Research Topics
| H TiitinenSummaryAffiliation: University of Helsinki Country: Finland Publications
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Detail Information
Publications
Frequency change detection in human auditory cortexP May
Department of Mathematics, King s College London, Strand, UK
J Comput Neurosci 6:99-120. 1999..The experimental results bear out the prediction that MMN is due to both adaptation and lateral inhibition. Finally, we suggest that MMN might serve as a probe of what stimulus features are mapped by human auditory cortex...- Modeling the categorical perception of speech sounds: a step toward biological plausibilityNelli H Salminen
Helsinki University of Technology, Helsinki, Finland
Cogn Affect Behav Neurosci 9:304-13. 2009..Thus, the present study offers a unifying framework for explaining the neural basis of the warping of perceptual space associated with categorical perception... - Cortical sensitivity to periodicity of speech soundsSanteri Yrttiaho
Department of Signal Processing and Acoustics, Helsinki University of Technology, PO Box 3300, FI 02015 TKK, Finland
J Acoust Soc Am 123:2191-9. 2008..The behavior of the N1m latency and the emergence of a response cascade at very low F0 values may reflect the lower limit of pitch perception... - The right-hemispheric auditory cortex in humans is sensitive to degraded speech soundsLassi A Liikkanen
Apperception and Cortical Dynamics ACD, Cognitive Science Unit, Department of Psychology, University of Helsinki, Finland
Neuroreport 18:601-5. 2007..Thus, the auditory cortex of right hemisphere might be particularly involved in processing degraded speech and possibly compensates for the poor signal quality by increasing its activity... - From the repression of contents to the rules of the (narrative) self: a present-day cognitive view of the Freudian phenomenon of repressed contentsVesa Talvitie
Apperception and Cortical Dynamics ACD, Department of Psychology, University of Helsinki, Finland
Psychol Psychother 79:165-81. 2006..It also becomes apparent that certain fundamental problems met in the study of the self are the ones that Freud tried to solve in his meta-psychological writings... - The contribution of high frequencies to human brain activity underlying horizontal localization of natural spatial soundsSakari Leino
Apperception and Cortical Dynamics ACD, Department of Psychology, University of Helsinki, Finland
BMC Neurosci 8:78. 2007..Stimuli were presented to the subjects during MEG registration and in a behavioral listening experiment... - Periodic glottal excitation and formant frequencies in the perception of vowelsH Tiitinen
Apperception and Cortical Dynamics, Department of Psychology, University of Helsinki, Finland
Neurol Clin Neurophysiol 2004:103. 2004..Thus, changes affecting the perceptual quality of speech signals without changing their phonetic content modify the dynamics of human auditory cortex... - Behavioral detection of spatial stimuli is reflected in auditory cortical dynamicsH Tiitinen
Apperception and Cortical Dynamics, Department of Psychology, University of Helsinki, Finland
Neurol Clin Neurophysiol 2004:50. 2004..The behavioral performance of the subjects correlated positively with N100m amplitude organization, showing that the dynamics of auditory cortex predict behavioral sound detection... - Disentangling the effects of phonation and articulation: hemispheric asymmetries in the auditory N1m response of the human brainHannu Tiitinen
Apperception and Cortical Dynamics, Department of Psychology, University of Helsinki, POB 9, FIN 00014, Finland
BMC Neurosci 6:62. 2005.... - Neuromagnetic recordings reveal the temporal dynamics of auditory spatial processing in the human cortexHannu Tiitinen
Apperception and Cortical Dynamics ACD, Cognitive Science, Department of Psychology, P O Box 9, FIN 00014 University of Helsinki, Finland
Neurosci Lett 396:17-22. 2006..The latter activations, however, were specific to attentional engagement and motor responding. This suggests that parietal activation reflects active responding to a spatial sound rather than auditory spatial processing as such... - Averaged and single-trial brain responses in the assessment of human sound detectionHannu Tiitinen
Apperception and Cortical Dynamics, Department of Psychology, University of Helsinki, PO Box 9, FIN 00014, Finland
Neuroreport 16:545-8. 2005..The transient response reported here holds promise for rapid, objective hearing assessment not requiring a behavioural task... - Electromagnetic recordings reveal latency differences in speech and tone processing in humansH Tiitinen
Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, PO Box 13 Meritullinkatu 1, FIN 00014, Helsinki, Finland
Brain Res Cogn Brain Res 8:355-63. 1999..The findings are discussed in relation to previous observations on cortical processing of sinusoidal and vowel sounds and with regard to the glottal excitation in speech processing... - Separation of contamination caused by coil clicks from responses elicited by transcranial magnetic stimulationH Tiitinen
Department of Psychology, University of Helsinki, Finland
Clin Neurophysiol 110:982-5. 1999..Furthermore, clicks were found to interact with simultaneously presented auditory sinewave stimuli, resulting in an amplitude decrease in the auditory N1 response... - Scopolamine augments transient auditory 40-hz magnetic response in humansJ Ahveninen
Department of Psychology, University of Helsinki, Finland
Neurosci Lett 277:115-8. 1999..01) augmented the 40-Hz magnetic response over the hemispheres ipsi- and contralateral to the ear stimulated. This finding suggests muscarinic modulation of the auditory evoked transient 40-Hz response... - Transient brain responses predict the temporal dynamics of sound detection in humansVille Mäkinen
Apperception and Cortical Dynamics, Department of Psychology, University of Helsinki, Helsinki FIN 00014, Finland
Neuroimage 21:701-6. 2004..Thus, noninvasively measured transient events in the human auditory cortex can be used to predict accurately the temporal course of sound detection and may therefore turn out to be useful in clinical settings... - Magnetoencephalographic (MEG) localization of the auditory N400m: effects of stimulus durationA M Mäkelä
Department of Phonetics, University of Helsinki, Finland
Neuroreport 12:249-53. 2001..The differential amplitude behaviour of the N400m between the two subject groups further suggests that comprehension of the semantic content of the speech message is also required... - Cortical activity elicited by isolated vowels and diphthongsA M Mäkelä
Apperception and Cortical Dynamics, Department of Psychology, University of Helsinki, Finland
Neurol Clin Neurophysiol 2004:91. 2004..Notably, the stimuli appeared to elicit left-hemispheric activity resembling the N400, typically obtained by using more complicated speech stimuli such as words and sentences... - The auditory n100m response reflects changes in speech fundamental frequencyA M Mäkelä
Apperception and Cortical Dynamics, Department of Psychology, University of Helsinki, Finland
Neurol Clin Neurophysiol 2004:49. 2004..The present observations are interpreted in terms of the interrelatedness of speech production and perception... - Benzodiazepine temazepam suppresses the transient auditory 40-Hz response amplitude in humansI P Jääskeläinen
Department of Psychology, University of Helsinki, Finland
Neurosci Lett 268:105-7. 1999..This suggests involvement of GABA(A) receptors in transient auditory 40-Hz response generation, however, not in the attentive modulation of the 40-Hz response... - Suppression of transient 40-Hz auditory response by haloperidol suggests modulation of human selective attention by dopamine D2 receptorsJ Ahveninen
Cognitive Brain Research Unit, Department of Psychology, PO Box 13, FIN 00014 University of Helsinki, Helsinki, Finland
Neurosci Lett 292:29-32. 2000..The present result suggests that dopamine D(2) receptors modulate selective attention... - Dose-dependent suppression by ethanol of transient auditory 40-Hz responseI P Jääskeläinen
Cognitive Brain Research Unit, Department of Psychology, P O Box 13, Meritullinkatu 1, 00014 University of Helsinki, Finland
Psychopharmacology (Berl) 148:132-5. 2000.... - A population rate code of auditory space in the human cortexNelli H Salminen
Department of Biomedical Engineering and Computational Science, Helsinki University of Technology, Helsinki, Finland
PLoS ONE 4:e7600. 2009..Previous work on the human auditory cortex has revealed areas specialized in spatial processing but how the neurons in these areas represent the location of a sound source remains unknown... - Human cortical dynamics determined by speech fundamental frequencyAnna Mari Mäkelä
Apperception and Cortical Dynamics, Department of Psychology, P O Box 13, FIN 00014, University of Helsinki, Finland
Neuroimage 17:1300-5. 2002.... - Auditory scene analysis and sensory memory: the role of the auditory N100mP J C May
Apperception and Cortical Dynamics, Department of Psychology, University of Helsinki, Finland
Neurol Clin Neurophysiol 2004:19. 2004..As the emergence of the SR coincides with the stimuli being perceived as auditory streams, our study suggests that auditory sensory memory as indexed by transient and sustained cortical activity might underlie auditory scene analysis... - Auditory evoked responses are additive to brain oscillationsV T Mäkinen
Apperception and Cortical Dynamics, Department of Psychology, University of Helsinki, Finland
Neurol Clin Neurophysiol 2004:45. 2004..When examining evoked brain activity with methods providing simultaneous frequency and time information, emphasizing temporal accuracy is likely to provide more accurate descriptions of non-stationary processes of the human brain... - Spectral characterization of ongoing and auditory event-related brain processesV T Mäkinen
Apperception and Cortical Dynamics, Department of Psychology, University of Helsinki, Finland
Neurol Clin Neurophysiol 2004:104. 2004..Thus, the presented methods enable the straightforward detection of ongoing brain oscillations and their association with event-related power changes... - The auditory N1m reveals the left-hemispheric representation of vowel identity in humansAnna Mari Mäkelä
Apperception and Cortical Dynamics, Department of Psychology, Box 9, University of Helsinki, Helsinki, FIN 00014, Finland
Neurosci Lett 353:111-4. 2003..Thus, direct evidence for the orderly left-hemispheric representation of phonemes in human auditory cortex was found... - Visual short-term memory load affects sensory processing of irrelevant sounds in human auditory cortexJussi Valtonen
Apperception Cortical Dynamics ACD, Department of Psychology, P O Box 9, University of Helsinki, FIN 00014 Helsinki, Finland
Brain Res Cogn Brain Res 17:358-67. 2003..Thus, it appears that task demands requiring attentional allocation and short-term memory result in interaction across visual and auditory brain areas carrying out the processing of stimulus features... - Left-hemispheric brain activity reflects formant transitions in speech soundsAnna Mari Mäkelä
Apperception and Cortical Dynamics, Department of Psychology, University of Helsinki, Helsinki, Finland
Neuroreport 16:549-53. 2005..Thus, the present study demonstrates how magnetoencephalography can be used to investigate the spatiotemporal evolution in cortical activity related to the various stages of the processing of speech... - Glides in speech fundamental frequency are reflected in the auditory N1m responseAnna Mari Mäkelä
Apperception and Cortical Dynamics ACD, Department of Psychology, P O Box 9, FIN 00014 University of Helsinki, Finland
Neuroreport 15:1205-8. 2004..Thus, the speech-specific behavior of the N1m arises out of cortical sensitivity to the acoustic structure of voiced speech, that is to the F0 and its harmonics, which underlie the perception of pitch and intonation in speech... - Aging and cholinergic modulation of the transient magnetic 40-Hz auditory responseJyrki Ahveninen
Cognitive Brain Research Unit, Department of Neurology, University of Helsinki, FIN 00014 Helsinki, Finland
Neuroimage 15:153-8. 2002..In sum, the transient magnetic 40-Hz auditory response may be useful in studies on brain cholinergic deficits in elderly subjects... - Human cortical processing of auditory events over timeP May
Apperception and Cortical Dynamics (ACD, Department of Psychology, University of Helsinki, Finland
Neuroreport 12:573-7. 2001..Our modelling and experimental results therefore provide evidence that the temporal structure of the auditory environment is decomposed in human auditory cortex by cells performing bandpass filtering on periodic input... - Auditory event-related responses are generated independently of ongoing brain activityVille Mäkinen
Apperception and Cortical Dynamics ACD, Department of Psychology, PO Box 9, FIN 00014 University of Helsinki, Finland
Neuroimage 24:961-8. 2005..Thus, on the basis of our observations, auditory event-related responses are unique descriptors of neural information processing in humans, generated by processes separate from and additive to ongoing brain activity... - The use of stationarity and nonstationarity in the detection and analysis of neural oscillationsVille T Mäkinen
Apperception and Cortical Dynamics, Department of Psychology, PO Box 9, FIN 00014, University of Helsinki, Finland
Neuroimage 28:389-400. 2005.... - Human auditory event-related processes in the time-frequency planeVille T Mäkinen
Apperception and Cortical Dynamics, Department of Psychology, University of Helsinki, Finland
Neuroreport 15:1767-71. 2004..These results indicate that auditory event-related processes consist not only of the well-established transient responses but also of power reductions of ongoing, non-phase-locked brain processes... - The MMN is a derivative of the auditory N100 responseP J C May
Apperception and Cortical Dynamics, Department of Psychology, University of Helsinki, Finland
Neurol Clin Neurophysiol 2004:20. 2004.... - Cortical processing of speech sounds and their analogues in a spatial auditory environmentKalle J Palomäki
Speech and Hearing Research Group, Department of Computer Science, University of Sheffield, Sheffield, UK
Brain Res Cogn Brain Res 14:294-9. 2002.... - Spatial processing in human auditory cortex: the effects of 3D, ITD, and ILD stimulation techniquesKalle J Palomäki
Laboratory of Acoustics and Audio Signal Processing, Helsinki University of Technology, P O Box 3000, FIN 02015 HUT, Finland
Brain Res Cogn Brain Res 24:364-79. 2005..Thus, the activity taking place already in the auditory cortex predicts behavioral sound detection of spatial stimuli, and the amount of spatial cues embedded in the signal are reflected in the activity of this brain area... - Human posterior auditory cortex gates novel sounds to consciousnessIiro P Jaaskelainen
Massachusetts General Hospital, Massachusetts Institute of Technology, Harvard Medical School, Athinoula A Martinos Center for Biomedical Imaging, Charlestown, MA 02129, USA
Proc Natl Acad Sci U S A 101:6809-14. 2004..Our converging findings suggest that transient adaptation of feature-specific neurons within human posterior auditory cortex filters superfluous sounds from entering one's awareness...