R Hari

Summary

Affiliation: Helsinki University of Technology
Country: Finland

Publications

  1. ncbi Right-hemisphere preponderance of responses to painful CO2 stimulation of the human nasal mucosa
    R Hari
    Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Pain 72:145-51. 1997
  2. ncbi Three hands: fragmentation of human bodily awareness
    R Hari
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Neurosci Lett 240:131-4. 1998
  3. ncbi Activation of human primary motor cortex during action observation: a neuromagnetic study
    R Hari
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN 02015 HUT, Espoo, Finland
    Proc Natl Acad Sci U S A 95:15061-5. 1998
  4. ncbi Magnetoencephalography in the study of human somatosensory cortical processing
    R Hari
    Brain Research Unit, Helsinki University of Technology, Espoo, Finland
    Philos Trans R Soc Lond B Biol Sci 354:1145-54. 1999
  5. ncbi Prolonged attentional dwell time in dyslexic adults
    R Hari
    Brain Research Unit, Helsinki University of Technology, Espoo, Finland
    Neurosci Lett 271:202-4. 1999
  6. ncbi [Neural basis of social cognition]
    Riitta Hari
    Teknillinen korkeakoulu, , Espoo
    Duodecim 119:1465-70. 2003
  7. ncbi Ipsilateral movement-evoked fields reconsidered
    R Hari
    Low Temperature Laboratory, Helsinki University of Technology, Espoo, FIN 02015 HUT, Finland
    Neuroimage 10:582-8. 1999
  8. ncbi [Magnetic images of living tissues and organs]
    Riitta Hari
    Teknillinen korkeakoulu, , Espoo
    Duodecim 119:2420-2. 2003
  9. ncbi Left minineglect in dyslexic adults
    R Hari
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Brain 124:1373-80. 2001
  10. ncbi The brain in time: insights from neuromagnetic recordings
    Riitta Hari
    Brain Research Unit, Low Temperature Laboratory, Aalto University School of Science and Technology, Aalto, Espoo, Finland
    Ann N Y Acad Sci 1191:89-109. 2010

Detail Information

Publications101 found, 100 shown here

  1. ncbi Right-hemisphere preponderance of responses to painful CO2 stimulation of the human nasal mucosa
    R Hari
    Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Pain 72:145-51. 1997
    ....
  2. ncbi Three hands: fragmentation of human bodily awareness
    R Hari
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Neurosci Lett 240:131-4. 1998
    ..P.'s sensations. We conclude that simultaneous mental contents about body scheme may be based on neural information extracted at considerably different times, resulting in fragmentation of bodily awareness...
  3. ncbi Activation of human primary motor cortex during action observation: a neuromagnetic study
    R Hari
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN 02015 HUT, Espoo, Finland
    Proc Natl Acad Sci U S A 95:15061-5. 1998
    ..These findings have implications for a better understanding of the machinery underlying action recognition in humans...
  4. ncbi Magnetoencephalography in the study of human somatosensory cortical processing
    R Hari
    Brain Research Unit, Helsinki University of Technology, Espoo, Finland
    Philos Trans R Soc Lond B Biol Sci 354:1145-54. 1999
    ..Somatically evoked MEG signals may also be detected from the posterior parietal cortex, central mesial cortex and the frontal lobe. The serial versus parallel processing in the cortical somatosensory network is still under debate...
  5. ncbi Prolonged attentional dwell time in dyslexic adults
    R Hari
    Brain Research Unit, Helsinki University of Technology, Espoo, Finland
    Neurosci Lett 271:202-4. 1999
    ..Thus a target captures attentional resources for considerably longer time in dyslexics than control subjects. The observed prolongation could significantly contribute to the sluggish temporal processing of dyslexic adults...
  6. ncbi [Neural basis of social cognition]
    Riitta Hari
    Teknillinen korkeakoulu, , Espoo
    Duodecim 119:1465-70. 2003
  7. ncbi Ipsilateral movement-evoked fields reconsidered
    R Hari
    Low Temperature Laboratory, Helsinki University of Technology, Espoo, FIN 02015 HUT, Finland
    Neuroimage 10:582-8. 1999
    ..The results indicate that the MEFs receive a strong contribution from tactile input. In our experiment the ipsilateral sensorimotor activation was triggered by the movement-related vibrations transmitted to the resting hand...
  8. ncbi [Magnetic images of living tissues and organs]
    Riitta Hari
    Teknillinen korkeakoulu, , Espoo
    Duodecim 119:2420-2. 2003
  9. ncbi Left minineglect in dyslexic adults
    R Hari
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Brain 124:1373-80. 2001
    ..Based on these and previous data, we propose a causal chain which could result in several sensory and cognitive deficits observed in dyslexic subjects...
  10. ncbi The brain in time: insights from neuromagnetic recordings
    Riitta Hari
    Brain Research Unit, Low Temperature Laboratory, Aalto University School of Science and Technology, Aalto, Espoo, Finland
    Ann N Y Acad Sci 1191:89-109. 2010
    ..Instrumentation and data analysis methods are rapidly progressing, enabling attempts to decode the four-dimensional spatiotemporal signal patterns to reveal correlates of behavior and mental contents...
  11. ncbi Brain basis of human social interaction: from concepts to brain imaging
    Riitta Hari
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Physiol Rev 89:453-79. 2009
    ..We conclude by discussing some major disorders of social interaction...
  12. ncbi Enhanced extrastriate activation during observation of distorted finger postures
    Sari Avikainen
    Helsinki University of Technology, Espoo, Finland
    J Cogn Neurosci 15:658-63. 2003
    ..We interpret this result as an early top-down effect of emotional valence on the processing of unusual hand shapes in the extrastriate visual cortex...
  13. ncbi Action-perception connection and the cortical mu rhythm
    Riitta Hari
    Brain Research Unit, Low Temperature Laboratory and Advanced Magnetic Imaging Centre, Helsinki University of Technology, Otakaari 3A, Espoo, 02015 TKK, Finland
    Prog Brain Res 159:253-60. 2006
    ..Reactivity of the mu rhythm, especially its motor cortex 20-Hz component, provides an illuminating window to the involvement of the human sensorimotor system in the loop that connects action and perception with the environment...
  14. ncbi Magnetoencephalographic cortical rhythms
    R Hari
    Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Int J Psychophysiol 26:51-62. 1997
    ..Finally, some clarifications are suggested to the terminology of brain rhythms...
  15. ncbi Three-dimensional integration of brain anatomy and function to facilitate intraoperative navigation around the sensorimotor strip
    J P Makela
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Hum Brain Mapp 12:180-92. 2001
    ....
  16. ncbi Sustained activation of the human SII cortices by stimulus trains
    N Forss
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN-02015 HUT, Espoo, Finland
    Neuroimage 13:497-501. 2001
    ..The different response patterns of SI and SII suggest that the inhibition, following the early excitatory responses, is weaker at SII than SI, or that inhibitory responses of these two areas differ in their relative timing...
  17. ncbi Audiovisual integration of letters in the human brain
    T Raij
    Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Neuron 28:617-25. 2000
    ..quot; The dynamics of these functions bring new insight into the interplay between sensory and association cortices during object recognition...
  18. ncbi Tactile information from the human hand reaches the ipsilateral primary somatosensory cortex
    A Schnitzler
    Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Neurosci Lett 200:25-8. 1995
    ..This interhemispheric information transfer may represent a neurophysiological substrate of somatosensory fusion between the hands...
  19. ncbi Dorsal penile nerve stimulation elicits left-hemisphere dominant activation in the second somatosensory cortex
    J P Makela
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Hum Brain Mapp 18:90-9. 2003
    ..In addition to tactile processing, SII could also contribute to mediating emotional effects of DPN stimuli...
  20. ncbi Functional overlap of finger representations in human SI and SII cortices
    C Simoes
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN 02015 HUT Espoo, Finland
    J Neurophysiol 86:1661-5. 2001
    ..The results indicate a strong and symmetric overlap of finger representations for both hands in the human SII cortices, and a weaker functional overlap for fingers of the same hand in the SI cortex...
  21. ncbi Temporal dynamics of cortical representation for action
    N Nishitani
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, P O BOX 2200, FIN 02015 HUT, Espoo, Finland
    Proc Natl Acad Sci U S A 97:913-8. 2000
    ..The mirror system matches action observation and execution and probably contributes to our understanding of actions made by others...
  22. ncbi Relationship between responses to contra- and ipsilateral stimuli in the human second somatosensory cortex SII
    C Simoes
    Low Temperature Laboratory, Helsinki University of Technology, Espoo, FIN 02015 HUT, Finland
    Neuroimage 10:408-16. 1999
    ..These results suggest that neuronal activations due to contra- and ipsilateral stimuli overlap strongly in the human SII cortex...
  23. ncbi Modulation of human cortical rolandic rhythms during natural sensorimotor tasks
    S Salenius
    Brain Research Unit, Helsinki University of Technology, Espoo, Finland
    Neuroimage 5:221-8. 1997
    ..The rebound is left-hemisphere dominant in right-handed subjects and its suppression reveals bilateral cortical activation during both motor tasks and passive tactile stimulation, especially for explorative finger movements...
  24. ncbi Somatosensory evoked fields to large-area vibrotactile stimuli
    V Jousmaki
    Low Temperature Laboratory, Helsinki University of Technology, Finland
    Clin Neurophysiol 110:905-9. 1999
    ..These simple vibrotactile stimuli could be useful for rapid and reliable identification of the somatosensory and auditory cortices, for example in presurgical evaluation of children...
  25. ncbi Cortical activation associated with passive movements of the human index finger: an MEG study
    F Alary
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT, Espoo, Finland
    Neuroimage 15:691-6. 2002
    ..Our results suggest a predominant role for the human left SII cortex in proprioceptive processing...
  26. ncbi A brush stimulator for functional brain imaging
    V Jousmaki
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Brain Research Unit, Otakaari 3, 02015 HUT, Espoo, Finland
    Clin Neurophysiol 118:2620-4. 2007
    ..To describe a novel non-magnetic hand-held device to stimulate various parts of the skin and to evaluate its performance in magnetoencephalographic (MEG) recordings...
  27. ncbi Stronger reactivity of the human primary motor cortex during observation of live rather than video motor acts
    J Järveläinen
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology FIN 02015 HUT, Finland
    Neuroreport 12:3493-5. 2001
    ..These results suggest that the human mirror neuron system differentiates natural and artificially presented movements...
  28. ncbi Activation trace lifetime of human cortical responses evoked by apparent visual motion
    M A Uusitalo
    Brain Research Unit, Helsinki University of Technology, Espoo, Finland
    Neurosci Lett 224:45-8. 1997
    ..e. how long the V5 cortex "remembers' each stimulus. The lifetimes varied interindividually from 0.4 to 1.4 s, but were within 0.1 s in the hemispheres of the four subjects with bilaterally identified sources...
  29. ncbi Evidence for a 7- to 9-Hz "sigma" rhythm in the human SII cortex
    L Narici
    Brain Research Unit, Helsinki University of Technology, Espoo, FIN-02015 HUT, Finland
    Neuroimage 13:662-8. 2001
    ..Single stimuli may trigger several periods of the rhythm. The functional significance of the sigma rhythm remains to be investigated...
  30. ncbi Activation of the human occipital and parietal cortex by pattern and luminance stimuli: neuromagnetic measurements
    K Portin
    Brain Research Unit, Helsinki University of Technology, Espoo, Finland
    Cereb Cortex 8:253-60. 1998
    ..These findings are also in line with a stronger attention-catching value of the luminance than pattern stimuli...
  31. ncbi Subject's own speech reduces reactivity of the human auditory cortex
    J Numminen
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Neurosci Lett 265:119-22. 1999
    ..This effect was more prominent in responses to ipsilateral than contralateral tones, possibly due to a sum effect of diminished ipsilateral input to the cortex and decreased transcallosal excitation...
  32. ncbi Human cortical 40 Hz rhythm is closely related to EMG rhythmicity
    S Salenius
    Brain Research Unit, Helsinki University of Technology, Finland
    Neurosci Lett 213:75-8. 1996
    ..The coherence of these rhythms with muscular firing patterns likely reflects communication between the sensorimotor cortex and the motor units...
  33. ncbi Human parieto-occipital visual cortex: lack of retinotopy and foveal magnification
    K Portin
    Brain Research Unit, Helsinki University of Technology, Espoo, Finland
    Proc Biol Sci 266:981-5. 1999
    ..This result strengthens our previous suggestion that the medial parieto-occipital sulcus is the human homologue of the monkey V6 complex, characterized by, for example, lack of retinotopy and the absence of relative foveal magnification...
  34. ncbi Activation of the human posterior parietal and temporoparietal cortices during audiotactile interaction
    R Gobbele
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, P O BOX 2200, FIN 02015 HUT, Espoo, Finland
    Neuroimage 20:503-11. 2003
    ....
  35. ncbi The imprint of action: motor cortex involvement in visual perception of handwritten letters
    M Longcamp
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN 02015 HUT, Espoo, Finland
    Neuroimage 33:681-8. 2006
    ..These results support the idea of embodied visual perception of handwritten scripts and the involvement of the motor cortex in the underlying action-perception link...
  36. ncbi Magnetoencephalographic correlates of audiotactile interaction
    B Lütkenhöner
    Brain Research Unit, University of Technology, Espoo, Finland
    Neuroimage 15:509-22. 2002
    ....
  37. ncbi Oscillatory interaction between human motor cortex and trunk muscles during isometric contraction
    N Murayama
    Brain Research Unit, Helsinki University of Technology, Espoo, FIN-02150, Finland
    Neuroimage 14:1206-13. 2001
    ..Our results indicate that during isometric contractions descending motor commands are modulated by cortical oscillations for both limb and trunk muscles, although the modulation is weaker and may be bilateral for trunk muscles...
  38. ncbi Reactivity of magnetic parieto-occipital alpha rhythm during visual imagery
    S Salenius
    Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Electroencephalogr Clin Neurophysiol 95:453-62. 1995
    ..Sources for the alpha activity, modeled with equivalent current dipoles, clustered in the parietal and occipital lobes. The strongest suppression of the activity occurred near the parieto-occipital sulcus...
  39. ncbi Evidence for reactive magnetic 10-Hz rhythm in the human auditory cortex
    L Lehtelä
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Neurosci Lett 222:111-4. 1997
    ..5 Hz activity, with sources in the superior temporal lobes, was transiently suppressed by the sounds in eight out of nine subjects. Our results support the existence of a distinct, reactive auditory rhythm in the human temporal cortex...
  40. ncbi Stronger occipital cortical activation to lower than upper visual field stimuli. Neuromagnetic recordings
    K Portin
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Exp Brain Res 124:287-94. 1999
    ..These results agree with psychophysical data, which indicate lower visual field advantage in complex visual processing. Parieto-occipital responses in the putative V6 complex were similar to lower and upper field stimuli...
  41. ncbi Human auditory cortex is activated by omissions of auditory stimuli
    T Raij
    Brain Research Unit, Helsinki University of Technology, Espoo, Finland
    Brain Res 745:134-43. 1997
    ..Additional activity was observed in the posterolateral frontal cortex and in the superior temporal sulcus, more often in the right than in the left hemisphere...
  42. ncbi Vibration-induced auditory-cortex activation in a congenitally deaf adult
    S Levänen
    Brain Research Unit, Helsinki University of Technology, Espoo, Finland
    Curr Biol 8:869-72. 1998
    ..Our findings suggest that human cortical areas, normally subserving hearing, may process vibrotactile information in the congenitally deaf...
  43. ncbi Neuromagnetic responses to vowels vs. tones reveal hemispheric lateralization
    E Kirveskari
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Otakaari 3A, P O BOX 2200, FIN 02015 HUT, Espoo, Finland
    Clin Neurophysiol 117:643-8. 2006
    ..Such information would be important for later development of clinical noninvasive tests of hemispheric language dominance in candidates for brain surgery...
  44. ncbi Speaking modifies voice-evoked activity in the human auditory cortex
    G Curio
    Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Hum Brain Mapp 9:183-91. 2000
    ..Such motor-to-sensory priming of early auditory cortex responses during voicing constitutes one element of speech self-monitoring that could be compromised in central speech disorders...
  45. ncbi On the human sensorimotor-cortex beta rhythm: sources and modeling
    O Jensen
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Finland
    Neuroimage 26:347-55. 2005
    ..We found that an increase in IPSCs onto inhibitory neurons was more important for generating neuronal synchronization in the beta band than an increase in IPSCs onto excitatory pyramidal cells...
  46. ncbi Human cortical-evoked fields during detection, localisation, and identification of 'pop-out' targets
    J Saarinen
    Brain Research Unit, Helsinki University of Technology, Finland
    Perception 27:215-24. 1998
    ..The activation of the right occipito-temporal source depended on the task. The maximum amplitude was smallest for the passive viewing, increased for the detection task, and was largest for the localisation and identification...
  47. ncbi Cortical sources of human short-latency somatosensory evoked fields to median and ulnar nerve stimuli
    S Vanni
    Brain Research Unit, Helsinki University of Technology, Espoo, Finland
    Brain Res 737:25-33. 1996
    ..These results suggest that M20 and M40 to upper limb stimulation represent activation of distinct neuronal populations in hand SI cortex, presumably in area 3b...
  48. ncbi Cortical representation of sign language: comparison of deaf signers and hearing non-signers
    S Levänen
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN 02015 HUT, Espoo, Finland
    Cereb Cortex 11:506-12. 2001
    ....
  49. ncbi Oscillatory cortical drive to isometrically contracting muscle in Unverricht-Lundborg type progressive myoclonus epilepsy (ULD)
    Teija Silén
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, P O BOX 2200, FIN 02015 HUT, Espoo, Finland
    Clin Neurophysiol 113:1973-9. 2002
    ..The results were compared with those of 8 healthy control subjects...
  50. ncbi Coinciding early activation of the human primary visual cortex and anteromedial cuneus
    S Vanni
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, P O BOX 2200, FIN 02015 HUT, Espoo, Finland
    Proc Natl Acad Sci U S A 98:2776-80. 2001
    ..The anteromedial cuneus has the temporal position needed to interact with the primary visual cortex V1 and thereby to modify information transferred via V1 to extrastriate cortices...
  51. ncbi Corticokinematic coherence during active and passive finger movements
    H Piitulainen
    Brain Research Unit, O V Lounasmaa Laboratory and MEG Core, Aalto NeuroImaging, School of Science, Aalto University, P O Box 15100, FI 00076 Aalto, Espoo, Finland Electronic address
    Neuroscience 238:361-70. 2013
    ..no-touch conditions. Our results suggest that the CKC occurring during repetitive finger movements is mainly driven by somatosensory, primarily proprioceptive, afferent input to the SM1 cortex, with negligible effect of cutaneous input...
  52. ncbi Viewing speech modulates activity in the left SI mouth cortex
    Riikka Möttönen
    Laboratory of Computational Engineering, Helsinki University of Technology, PO Box 3000, FIN 02015 HUT, Espoo, Finland
    Neuroimage 24:731-7. 2005
    ..The results provide further evidence for the view that SI is involved in "mirroring" of other persons' actions...
  53. ncbi Reproducibility of cortex-muscle coherence
    Marjatta Pohja
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, PO Box 2200, FIN 02015 HUT, Espoo, Finland
    Neuroimage 26:764-70. 2005
    ..However, caution is needed when interpreting absolute levels or changes in the strength of coherence in single subjects between the sessions...
  54. ncbi Oscillatory motor cortex-muscle coupling during painful laser and nonpainful tactile stimulation
    Andrej Stancak
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Neuroimage 26:793-800. 2005
    ..05). The observed coherence increase could be related to stabilization of the motor-cortex control after sensory input. Our findings add to the clinically interesting evidence about the cortical pain-motor system interaction...
  55. ncbi Modulation of motor-cortex oscillatory activity by painful Adelta- and C-fiber stimuli
    Tuukka T Raij
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, PO Box 2200, 02015, HUT, Finland
    Neuroimage 23:569-73. 2004
    ..These results suggest automatic, lateralized, excitation of the MI cortex by noxious Adelta- and C-fiber input...
  56. ncbi Diffusion tensor imaging and tractography of distal peripheral nerves at 3 T
    Jaana Hiltunen
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, P O BOX 2200, 02015 Espoo, HUT, Finland
    Clin Neurophysiol 116:2315-23. 2005
    ..We studied whether distal peripheral nerves could be imaged using quantitative diffusion tensor imaging (DTI) with a 3-T MRI scanner, and visualized using tractography...
  57. ncbi Activation of the human primary motor cortex during observation of tool use
    Juha Järveläinen
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology FIN 02015 HUT Espoo, Finland
    Neuroimage 23:187-92. 2004
    ..These results support the view that the motor-cortex activation is related to the observer's ability to understand and imitate motor acts...
  58. ncbi Common cortical network for first and second pain
    Nina Forss
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN 02015 HUT, Espoo, Finland
    Neuroimage 24:132-42. 2005
    ..Reliable temporospatial characterization of cortical responses to first and second pain offers a unique tool for basic and clinical neuroscience to study the two distinctive pain fiber systems at cortical level...
  59. ncbi Dissociation of face-selective cortical responses by attention
    Maura L Furey
    Laboratory of Brain and Cognition and Mood and Anxiety Disorders Program, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA
    Proc Natl Acad Sci U S A 103:1065-70. 2006
    ..By contrast, the early, face-specific M170 that was not modulated by attention likely reflects a rapid, feed-forward phase of face-selective processing...
  60. ncbi Manifest disease and motor cortex reactivity in twins discordant for schizophrenia
    Martin Schürmann
    Brain Research Unit, Helsinki University of Technology, Finland
    Br J Psychiatry 191:178-9. 2007
    ..During action observation and execution, motor cortex reaction was weaker in those with schizophrenia than in their co-twins, suggesting a disease-related dysfunction of motor cognition...
  61. ncbi Actor's and observer's primary motor cortices stabilize similarly after seen or heard motor actions
    Gina Caetano
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, P O BOX 2200, FIN 02015 HUT, Espoo, Finland
    Proc Natl Acad Sci U S A 104:9058-62. 2007
    ..Besides motor cortex activation before own and observed (predicted) actions, the M1 cortex of both the viewer and the listener stabilized in a very similar manner after brisk motor actions...
  62. ncbi Face recognition and cortical responses: effect of stimulus duration
    Topi Tanskanen
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, PO Box 2200, FI 02015 HUT, Espoo, Finland
    Neuroimage 35:1636-44. 2007
    ..In single-trial analysis the variability of response strengths increased in a direct proportion to response amplitude, demonstrating the averaged responses to be composed of graded rather than of all-or-nothing-type single responses...
  63. ncbi Phantom-based evaluation of geometric distortions in functional magnetic resonance and diffusion tensor imaging
    Seppo Mattila
    Brain Research Unit, Low Temperature Laboratory, TKK, Helsinki University of Technology, FI 02015 TKK, Espoo, Finland
    Magn Reson Med 57:754-63. 2007
    ..Possible future applications for this type of phantom include quality assurance and calibration of the hardware and software used in EPI-based functional MRI and DTI...
  64. ncbi Towards natural stimulation in fMRI--issues of data analysis
    Sanna Malinen
    Brain Research Unit of Low Temperature Laboratory, Helsinki University of Technology, P O BOX 2200, FI 02015 TKK, Espoo, Finland
    Neuroimage 35:131-9. 2007
    ..The ability to differentiate functionally meaningful composites of activated brain areas and to straightforwardly reveal their temporal dynamics renders ICA a sensitive tool to study brain responses to complex natural stimuli...
  65. ncbi Transient suppression of ipsilateral primary somatosensory cortex during tactile finger stimulation
    Yevhen Hlushchuk
    Low Temperature Laboratory, Helsinki University of Technology, 02150 TKK, Espoo, Finland
    J Neurosci 26:5819-24. 2006
    ..The shorter time course of deactivation than activation would agree with stronger decay of inhibitory than EPSP at the applied stimulus repetition rates...
  66. ncbi Quantification of mechanical vibration during diffusion tensor imaging at 3 T
    Jaana Hiltunen
    Advanced Magnetic Imaging Centre, Helsinki University of Technology, 02015 HUT, Helsinki, Finland
    Neuroimage 32:93-103. 2006
    ..Vibration levels might be reduced by adjusting imaging parameters, by modifying the gradient waveforms in the DTI sequence, and by redesigning the mechanics of patient bed to effectively dampen the movements...
  67. ncbi Improved differentiation of tactile activations in human secondary somatosensory cortex and thalamus using cardiac-triggered fMRI
    Sanna Malinen
    Brain Research Unit of Low Temperature Laboratory, Helsinki University of Technology, P O BOX 2200, 02015 TKK, Espoo, Finland
    Exp Brain Res 174:297-303. 2006
    ..In the group-level analysis, the thalamic response to finger stimulation was seen with cardiac triggering, only...
  68. ncbi Functional phantom for fMRI: a feasibility study
    Ville Renvall
    Advanced Magnetic Imaging Centre, Helsinki University of Technology, P O Box 3000, FI 02015 TKK Espoo, Finland
    Magn Reson Imaging 24:315-20. 2006
    ..Thus, this fMRI phantom could be useful for both cognitive fMRI studies and scanner calibration...
  69. ncbi The compassionate brain: humans detect intensity of pain from another's face
    Miiamaaria V Saarela
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Cereb Cortex 17:230-7. 2007
    ..These findings imply that the intersubjective representation of pain in the human brain is more detailed than has been previously thought...
  70. ncbi Touch activates human auditory cortex
    Martin Schürmann
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN 02015 Espoo, Finland
    Neuroimage 30:1325-31. 2006
    ..However, even tactile pulses (without any vibration) activated parts of the posterior auditory belt area, which therefore might subserve processing of audiotactile events that arise during dynamic contact between hands and environment...
  71. ncbi Yearning to yawn: the neural basis of contagious yawning
    Martin Schürmann
    Brain Research Unit, Low Temperature Laboratory, PO Box 2200, Helsinki University of Technology, 02015 HUT, Espoo, Finland
    Neuroimage 24:1260-4. 2005
    ..The subjects' self-reported tendency to yawn covaried negatively with activation of the left periamygdalar region, suggesting a connection between yawn contagiousness and amygdalar activation...
  72. ncbi Face recognition and cortical responses show similar sensitivity to noise spatial frequency
    Topi Tanskanen
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, PO Box 2200, FIN 02015, Espoo, Finland
    Cereb Cortex 15:526-34. 2005
    ....
  73. ncbi Abnormal response recovery in the right somatosensory cortex of dyslexic adults
    Hanna Renvall
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN 02015 HUT, Espoo, Finland
    Cereb Cortex 15:507-13. 2005
    ..The results agree with the proposed pansensory nature of temporal processing deficits in dyslexia, specifically demonstrating abnormal response recovery in the right somatosensory cortex...
  74. ncbi Phase locking between human primary and secondary somatosensory cortices
    Cristina Simões
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, P O BOX 2200, FIN 02015 HUT, Finland
    Proc Natl Acad Sci U S A 100:2691-4. 2003
    ..The observed SI-SII phase locking would not be reflected in the evoked responses because a considerable part of it was not time-locked to the stimuli. Thus, our finding reveals a unique interaction in the sensorimotor system...
  75. ncbi Impaired mirror-image imitation in Asperger and high-functioning autistic subjects
    Sari Avikainen
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN 02015 HUT, Espoo, Finland
    Curr Biol 13:339-41. 2003
    ..These results provide a new insight into the difficulties that autistic subjects face in viewing and understanding actions of others...
  76. ncbi Viewing lip forms: cortical dynamics
    Nobuyuki Nishitani
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, P O BOX 2200, FIN 02015 HUT, Espoo, Finland
    Neuron 36:1211-20. 2002
    ..These results demonstrate that still pictures, only implying motion, activate the human MNS in a well-defined temporal order...
  77. ncbi Human cortical representation of virtual auditory space: differences between sound azimuth and elevation
    Nobuya Fujiki
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN 02015 HUT, Espoo, Finland
    Eur J Neurosci 16:2207-13. 2002
    ..The binaural interaural time and interaural intensity difference cues were processed in the auditory cortex around 100-150 ms and the monaural spectral cues later around 200-250 ms...
  78. ncbi Auditory cortical responses to speech-like stimuli in dyslexic adults
    Hanna Renvall
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, PO Box 2200, FIN 02015 HUT, Espoo Finland
    J Cogn Neurosci 14:757-68. 2002
    ..The observed differences could be related to insufficient triggering of automatic auditory attention, resulting, for instance, from a general deficiency of the magnocellular system...
  79. ncbi Altered central sensorimotor processing in patients with complex regional pain syndrome
    Kirsi Juottonen
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT, Espoo, Finland
    Pain 98:315-23. 2002
    ..These results imply that chronic pain may alter central tactile and motor processing...
  80. ncbi Facilitation of the spinal H-reflex by auditory stimulation in dyslexic adults
    Katariina Saarelma
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 2200, 02015 HUT, Espoo, Finland
    Neurosci Lett 327:213-5. 2002
    ..The slightly prolonged facilitation in dyslexics agrees with the dyslexics' general sluggishness of sensorimotor processing...
  81. ncbi Cortico-muscular coupling in a human subject with mirror movements--a magnetoencephalographic study
    Marjatta Pohja
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, P O BOX 2200, FIN 02015 HUT, Espoo, Finland
    Neurosci Lett 327:185-8. 2002
    ..We suggest that our subject's MMs result from activation of an ipsilateral corticospinal projection, with involvement of additional synchronizing mechanisms at the subcortical, brainstem, or spinal level during bilateral contraction...
  82. ncbi Mind's ear in a musician: where and when in the brain
    Martin Schürmann
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN 02015 HUT, Finland
    Neuroimage 16:434-40. 2002
    ..These data imply a complex temporospatial activation sequence of multiple cortical areas when musicians recall firmly established audiovisual associations...
  83. ncbi Defective cortical drive to muscle in Parkinson's disease and its improvement with levodopa
    Stephan Salenius
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Brain 125:491-500. 2002
    ..Abnormalities in this aspect of basal ganglia function may directly contribute to bradykinesia and weakness in Parkinson's disease...
  84. ncbi Left-hemisphere-dominant SII activation after bilateral median nerve stimulation
    Cristina Simões
    Brain Research Unit, Helsinki University of Technology, FIN 02015 HUT, Espoo, Finland
    Neuroimage 15:686-90. 2002
    ..9 and 1.8 for wrist and thumb stimuli, respectively. The corresponding values were 1.5 and 1.7 in left-handers. The results indicate handedness-independent functional specialization of the human SII cortices...
  85. ncbi Visually evoked gamma responses in the human brain are enhanced during voluntary hyperventilation
    Ole Jensen
    Brain Research Unit, Helsinki University of Technology, Helsinki, FIN-02015 HUT, Finland
    Neuroimage 15:575-86. 2002
    ..We found that enhanced GABA(A) transmission, paired with enhanced excitability, can explain the increase in evoked gamma activity without changing the frequency...
  86. ncbi Effects of interstimulus interval on cortical responses to painful laser stimulation
    Tuukka T Raij
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    J Clin Neurophysiol 20:73-9. 2003
    ..On the basis of the time constants of the recovery cycles, the optimum ISI for obtaining the best signal-to-noise ratio for laser-evoked MEG and EEG responses during a fixed measurement interval is 4 to 5 seconds...
  87. ncbi Neuromagnetic responses to frequency-tagged sounds: a new method to follow inputs from each ear to the human auditory cortex during binaural hearing
    Nobuya Fujiki
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN 02015 HUT, Espoo, Finland
    J Neurosci 22:RC205. 2002
    ..This type of hemisphere- and ear-selective information on cortical binaural interaction could have important applications in human auditory neuroscience...
  88. ncbi Abnormal imitation-related cortical activation sequences in Asperger's syndrome
    Nobuyuki Nishitani
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Ann Neurol 55:558-62. 2004
    ..The observed abnormal premotor and motor processing could account for a part of imitation and social impairments in subjects with AS...
  89. ncbi Distal-to-proximal representation of volar index finger in human area 3b
    Yevhen Hlushchuk
    Brain Research Unit of Low Temperature Laboratory, Helsinki University of Technology, Finland
    Neuroimage 21:696-700. 2004
    ..1 mm. Thus the distal-to-proximal representation of the index finger shows a similar order in human and monkey SI cortex...
  90. ncbi Cortical activation during a spatiotemporal tactile comparison task
    Jussi Numminen
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Neuroimage 22:815-21. 2004
    ....
  91. ncbi Modulated activation of the human SI and SII cortices during observation of hand actions
    Sari Avikainen
    Brain Research Unit, Low Temoerature Laboratory, Helsinki University of Technology, Otakaari 3A, FIN 02015 HUT, Espoo, Finland
    Neuroimage 15:640-6. 2002
    ..Our results suggest that the SI and SII cortices contribute to the human mirror-neuron system, possibly providing information necessary for preserving the sense of self during action observation...
  92. ncbi Suppressed responses to self-triggered sounds in the human auditory cortex
    Mika H Martikainen
    Department of Clinical Neurophysiology, Helsinki University Central Hospital, FIN-00290 Helsinki, Finland
    Cereb Cortex 15:299-302. 2005
    ....
  93. ncbi Binaural interaction in the human auditory cortex revealed by neuromagnetic frequency tagging: no effect of stimulus intensity
    Ken ichi Kaneko
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, PO Box 2200, FIN 02015 HUT, Espoo, Finland
    Hear Res 183:1-6. 2003
    ..These data could be useful in examining patients who suffer from auditory disorders as well as in revealing basic mechanism of human auditory processing...
  94. ncbi Magnetoencephalographic analysis of bilaterally synchronous discharges in benign rolandic epilepsy of childhood
    Yung Yang Lin
    Integrated Brain Research Unit, Department of Medical Research and Education, Taipei Veterans General Hospital, No 201, sector 2, Shih Pai Road, Taipei 11217, Taiwan, ROC
    Seizure 12:448-55. 2003
    ..The sequential activation during BSDs in both hemispheres suggest the existence of synaptic connections, possibly via the corpus callosum, between bilateral irritative foci...
  95. ncbi Comparison of BOLD fMRI and MEG characteristics to vibrotactile stimulation
    Pasi I Tuunanen
    Department of Biomedical NMR and National Bio-NMR Facility, University of Kuopio, Finland
    Neuroimage 19:1778-86. 2003
    ..Our results support the view that combined use of brain mapping methods provides complementary information and should be considered in functional brain examinations...
  96. ncbi Diminished auditory mismatch fields in dyslexic adults
    Hanna Renvall
    Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland
    Ann Neurol 53:551-7. 2003
    ..Magnetic mismatch fields, elicited by the stimulus deviances, were diminished in the left hemisphere of the dyslexic subjects. The results indicate deficient change detection in the left auditory cortex of right-handed dyslexic adults...
  97. ncbi Hands help hearing: facilitatory audiotactile interaction at low sound-intensity levels
    Martin Schürmann
    Brain Research Unit, Low Temperature Laboratory, Helsinki University of Technology, FIN 02015 HUT Espoo, Finland
    J Acoust Soc Am 115:830-2. 2004
    ..The subjects chose on average 12% lower intensities (p < 0.01) for the probe tone when they touched the tube, suggesting facilitatory interaction between auditory and tactile senses in normal-hearing subjects...
  98. ncbi Brain correlates of subjective reality of physically and psychologically induced pain
    Tuukka T Raij
    Brain Research Unit of Low Temperature Laboratory and Advanced Magnetic Imaging Centre, Helsinki University of Technology, FIN-02015 HUT, Espoo, Finland
    Proc Natl Acad Sci U S A 102:2147-51. 2005
    ..The medial prefrontal cortex is a likely area to contribute to such source monitoring...
  99. ncbi Synchronous cortical oscillatory activity during motor action
    Stephan Salenius
    Brain Research Unit, Helsinki University of Technology, 02740 Espoo, Finland
    Curr Opin Neurobiol 13:678-84. 2003
    ..The rhythmic interaction may reveal interesting information in several motor disorders, including essential tremor, Parkinson's disease, myoclonus epilepsy, and mirror movements...
  100. ncbi Comparison of minimum current estimate and dipole modeling in the analysis of simulated activity in the human visual cortices
    Linda Stenbacka
    Brain Research Unit, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT, Espoo, Finland
    Neuroimage 16:936-43. 2002
    ..For all source configurations, considerably smaller source amplitudes were reported with MCE than with dipole model...
  101. ncbi [Louis-Jeantet Medical Award 2003 to Academy Professor Riitta Hari]
    Perttu J Lindsberg
    Neurotieteen tutkimusohjelma Biomedicum Helsinki, HYKS:n neurologian klinikka PL 700, 00029 HUS
    Duodecim 119:284-5. 2003