N Logothetis

Summary

Affiliation: Max Planck Institute for Biological Cybernetics
Country: Germany

Publications

  1. doi What we can do and what we cannot do with fMRI
    Nikos K Logothetis
    Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany, and Imaging Science and Biomedical Engineering, University of Manchester, Manchester M13 9PL, UK
    Nature 453:869-78. 2008
  2. ncbi Simultaneous recording of neuronal signals and functional NMR imaging
    Axel Oeltermann
    Max Planck Institute for Biological Cybernetics, Department of Physiology of Cognitive Processes, Spemannstrasse 38, 72076 Tubingen, Germany
    Magn Reson Imaging 25:760-74. 2007
  3. doi Hippocampal-cortical interaction during periods of subcortical silence
    N K Logothetis
    Max Planck Institute for Biological Cybernetics, Spemannstraße 38, 72076 Tuebingen, Germany
    Nature 491:547-53. 2012
  4. doi Intracortical recordings and fMRI: an attempt to study operational modules and networks simultaneously
    Nikos K Logothetis
    Max Planck Institute for Biological Cybernetics, Tuebingen, Germany
    Neuroimage 62:962-9. 2012
  5. pmc Towards extracellular Ca2+ sensing by MRI: synthesis and calcium-dependent 1H and 17O relaxation studies of two novel bismacrocyclic Gd3+ complexes
    Kirti Dhingra
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    J Biol Inorg Chem 13:35-46. 2008
  6. pmc A toolbox for the fast information analysis of multiple-site LFP, EEG and spike train recordings
    Cesare Magri
    Italian Institute of Technology, Department of Robotics, Brain and Cognitive Sciences, I 16163 Genoa, Italy
    BMC Neurosci 10:81. 2009
  7. pmc The neural basis of the blood-oxygen-level-dependent functional magnetic resonance imaging signal
    Nikos K Logothetis
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Philos Trans R Soc Lond B Biol Sci 357:1003-37. 2002
  8. ncbi Object vision and visual awareness
    N Logothetis
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    Curr Opin Neurobiol 8:536-44. 1998
  9. doi Bold claims for optogenetics
    Nikos K Logothetis
    Max Planck Institute for Biological Cybernetics, Tuebingen, Germany
    Nature 468:E3-4; discussion E4-5. 2010
  10. ncbi The underpinnings of the BOLD functional magnetic resonance imaging signal
    Nikos K Logothetis
    Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
    J Neurosci 23:3963-71. 2003

Detail Information

Publications113 found, 100 shown here

  1. doi What we can do and what we cannot do with fMRI
    Nikos K Logothetis
    Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany, and Imaging Science and Biomedical Engineering, University of Manchester, Manchester M13 9PL, UK
    Nature 453:869-78. 2008
    ..Here I give an overview of the current state of fMRI, and draw on neuroimaging and physiological data to present the current understanding of the haemodynamic signals and the constraints they impose on neuroimaging data interpretation...
  2. ncbi Simultaneous recording of neuronal signals and functional NMR imaging
    Axel Oeltermann
    Max Planck Institute for Biological Cybernetics, Department of Physiology of Cognitive Processes, Spemannstrasse 38, 72076 Tubingen, Germany
    Magn Reson Imaging 25:760-74. 2007
    ..Here, we provide a detailed description of the interference compensation system that can be used to record field and action potentials intracortically within a high-field scanner...
  3. doi Hippocampal-cortical interaction during periods of subcortical silence
    N K Logothetis
    Max Planck Institute for Biological Cybernetics, Spemannstraße 38, 72076 Tuebingen, Germany
    Nature 491:547-53. 2012
    ..Such a mechanism would cause minimal interference, enabling consolidation of hippocampus-dependent memory...
  4. doi Intracortical recordings and fMRI: an attempt to study operational modules and networks simultaneously
    Nikos K Logothetis
    Max Planck Institute for Biological Cybernetics, Tuebingen, Germany
    Neuroimage 62:962-9. 2012
    ....
  5. pmc Towards extracellular Ca2+ sensing by MRI: synthesis and calcium-dependent 1H and 17O relaxation studies of two novel bismacrocyclic Gd3+ complexes
    Kirti Dhingra
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    J Biol Inorg Chem 13:35-46. 2008
    ..On Ca2+ binding, the water exchange is slightly accelerated, which is likely related to the increased steric demand of the central part leading to a destabilization of the Ln-water binding interaction...
  6. pmc A toolbox for the fast information analysis of multiple-site LFP, EEG and spike train recordings
    Cesare Magri
    Italian Institute of Technology, Department of Robotics, Brain and Cognitive Sciences, I 16163 Genoa, Italy
    BMC Neurosci 10:81. 2009
    ....
  7. pmc The neural basis of the blood-oxygen-level-dependent functional magnetic resonance imaging signal
    Nikos K Logothetis
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Philos Trans R Soc Lond B Biol Sci 357:1003-37. 2002
    ....
  8. ncbi Object vision and visual awareness
    N Logothetis
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    Curr Opin Neurobiol 8:536-44. 1998
    ....
  9. doi Bold claims for optogenetics
    Nikos K Logothetis
    Max Planck Institute for Biological Cybernetics, Tuebingen, Germany
    Nature 468:E3-4; discussion E4-5. 2010
    ..Their experiments therefore do not pin down the identity of the specific neuronal signals that give rise to the BOLD signal...
  10. ncbi The underpinnings of the BOLD functional magnetic resonance imaging signal
    Nikos K Logothetis
    Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
    J Neurosci 23:3963-71. 2003
  11. ncbi MR imaging in the non-human primate: studies of function and of dynamic connectivity
    Nikos K Logothetis
    Max Planck Institute for Biological Cybernetics, Department of Physiology of Cognitive Processes, Spemannstr 38, 72076 Tubingen, Germany
    Curr Opin Neurobiol 13:630-42. 2003
    ..Moreover, the use of MRI-visible tracers and of electrical microstimulation applied during imaging proves to be ideal for the study of connectivity in the living animal...
  12. doi The effects of electrical microstimulation on cortical signal propagation
    Nikos K Logothetis
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    Nat Neurosci 13:1283-91. 2010
    ..Taken together, our findings suggest that electrical stimulation disrupts cortico-cortical signal propagation by silencing the output of any neocortical area whose afferents are electrically stimulated...
  13. ncbi Francis crick 1916-2004
    Nikos K Logothetis
    The author is at the Max Planck Institut für biologische Kybernetik, Spemannstrasse 38, Tubingen 72076, Germany
    Nat Neurosci 7:1027-8. 2004
  14. ncbi In vivo measurement of cortical impedance spectrum in monkeys: implications for signal propagation
    Nikos K Logothetis
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Neuron 55:809-23. 2007
    ..We propose that the spatial summation of LFP and MUA is determined by the size of these signals' generators and the nature of neural events underlying them, rather than by biophysical properties of gray matter...
  15. ncbi Ultra high-resolution fMRI in monkeys with implanted RF coils
    Nikos Logothetis
    Max Planck Institute for Biological Cybernetics, Spemannstr 38, Tuebingen, Germany
    Neuron 35:227-42. 2002
    ..The implications of this technique for combined fMRI/electrophysiology experiments and its limitations in terms of spatial coverage are discussed...
  16. pmc Single units and conscious vision
    N K Logothetis
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    Philos Trans R Soc Lond B Biol Sci 353:1801-18. 1998
    ..The mechanisms of rivalry are probably the same as, or very similar to, those underlying multistable perception in general, and further physiological studies might reveal much about the neural mechanisms of our perceptual organization...
  17. ncbi Functional imaging of the monkey brain
    N K Logothetis
    Max Planck Institute for Biological Cybernetics, Spemannstr 38, 72076 Tubingen, Germany
    Nat Neurosci 2:555-62. 1999
    ..Similar responses were obtained in alert, behaving monkeys performing a discrimination task...
  18. ncbi Object recognition: holistic representations in the monkey brain
    N K Logothetis
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    Spat Vis 13:165-78. 2000
    ..Our findings suggests that regarding their neural encoding faces are unlikely to be 'special', but they rather are the default 'special class' of the primate visual system...
  19. ncbi On the nature of the BOLD fMRI contrast mechanism
    Nikos K Logothetis
    Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Magn Reson Imaging 22:1517-31. 2004
    ..We conclude by considering applications of invasive MRI, including injections of paramagnetic tracers for the study of connectivity in the living animal and simultaneous imaging and electrical microstimulation...
  20. ncbi Neurophysiological investigation of the basis of the fMRI signal
    N K Logothetis
    Max Planck Institute for Biological Cybernetics, Tuebingen, Germany
    Nature 412:150-7. 2001
    ..These findings suggest that the BOLD contrast mechanism reflects the input and intracortical processing of a given area rather than its spiking output...
  21. ncbi Recording chronically from the same neurons in awake, behaving primates
    Andreas S Tolias
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    J Neurophysiol 98:3780-90. 2007
    ..The chronic recording techniques and methods of analyses we report can be used to characterize the changes in brain circuits due to learning...
  22. doi Unimodal responses prevail within the multisensory claustrum
    Ryan Remedios
    Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    J Neurosci 30:12902-7. 2010
    ..While these results confirm the notion of the claustrum as a multisensory structure per se, they argue against the hypothesis of the claustrum serving as an integrator of sensory information...
  23. ncbi Multisensory integration of dynamic faces and voices in rhesus monkey auditory cortex
    Asif A Ghazanfar
    Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
    J Neurosci 25:5004-12. 2005
    ..These multisensory processes in the auditory cortex likely occur via reciprocal interactions with the superior temporal sulcus...
  24. doi An auditory region in the primate insular cortex responding preferentially to vocal communication sounds
    Ryan Remedios
    Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    J Neurosci 29:1034-45. 2009
    ..Importantly, our results provide a neural counterpart for the human imaging and lesion findings and uncover a basis for a supposed role of the insula in processing vocal communication sounds such as speech...
  25. doi Spatial organization of multisensory responses in temporal association cortex
    Christoph D Dahl
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    J Neurosci 29:11924-32. 2009
    ....
  26. doi Low-frequency local field potentials and spikes in primary visual cortex convey independent visual information
    Andrei Belitski
    Max Planck Institute for Biological Cybernetics, D 72076 Tubingen, Germany
    J Neurosci 28:5696-709. 2008
    ....
  27. doi Decorrelated neuronal firing in cortical microcircuits
    Alexander S Ecker
    Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    Science 327:584-7. 2010
    ..Our findings suggest a refinement of current models of cortical microcircuit architecture and function: Either adjacent neurons share only a few percent of their inputs or, alternatively, their activity is actively decorrelated...
  28. pmc Context-dependent perceptual modulation of single neurons in primate visual cortex
    Alexander Maier
    Max Planck Institut für biologische Kybernetik, 72076 Tubingen, Germany
    Proc Natl Acad Sci U S A 104:5620-5. 2007
    ....
  29. pmc Monkey drumming reveals common networks for perceiving vocal and nonvocal communication sounds
    Ryan Remedios
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Proc Natl Acad Sci U S A 106:18010-5. 2009
    ....
  30. ncbi Functional MR imaging in the awake monkey: effects of motion on dynamic off-resonance and processing strategies
    Josef Pfeuffer
    Max Planck Institute for Biological Cybernetics, Department Physiology of Cognitive Processes, 72076 Tubingen, Germany
    Magn Reson Imaging 25:869-82. 2007
    ..Highly activated voxels also displayed good reproducibility between trials. On average, the BOLD amplitude response to a short 3-s visual stimulus was close to 2%...
  31. ncbi Region and volume dependencies in spectral line width assessed by 1H 2D MR chemical shift imaging in the monkey brain at 7 T
    Christoph Juchem
    Department of Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    Magn Reson Imaging 22:1373-83. 2004
    ..g., ventricles vs. surrounding tissue)...
  32. ncbi Phase locking of single neuron activity to theta oscillations during working memory in monkey extrastriate visual cortex
    Han Lee
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, D 72076 Tubingen, Germany
    Neuron 45:147-56. 2005
    ....
  33. ncbi Grouping and segmentation in binocular rivalry
    Michael A Silver
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, D 72076 Tubingen, Germany
    Vision Res 44:1675-92. 2004
    ..However, experiments with parametric variation of dot motion coherence suggested that segmentation mechanisms based on detection of collinearity can also influence perceptual selection and suppression in binocular rivalry...
  34. doi Optimizing the imaging of the monkey auditory cortex: sparse vs. continuous fMRI
    Christopher I Petkov
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    Magn Reson Imaging 27:1065-73. 2009
    ..We consider the choice of imaging paradigm as a key component in optimizing the fMRI of the monkey auditory cortex...
  35. ncbi Eye movements of monkey observers viewing vocalizing conspecifics
    Asif A Ghazanfar
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tuebingen, Germany
    Cognition 101:515-29. 2006
    ..The data therefore suggest that the sensorimotor strategies underlying bimodal speech perception may have a homologous counterpart in a closely related primate ancestor...
  36. ncbi Dissociation between local field potentials and spiking activity in macaque inferior temporal cortex reveals diagnosticity-based encoding of complex objects
    Kristina J Nielsen
    Max Planck Institute for Biological Cybernetics, D 72076 Tubingen, Germany
    J Neurosci 26:9639-45. 2006
    ..Our findings highlight the power of combined analysis of field potentials and spiking activity for mapping structure to computational function in the brain...
  37. ncbi 1H-MRS of the macaque monkey primary visual cortex at 7 T: strategies and pitfalls of shimming at the brain surface
    Christoph Juchem
    Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    Magn Reson Imaging 25:902-12. 2007
    ..The quality of the obtained results paves the way for further neuroscientific research, including studies on the cortical microcircuits and the dynamic longitudinal changes occurring during cortical reorganization and plasticity...
  38. doi Functional MRI evidence for LTP-induced neural network reorganization
    Santiago Canals
    Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    Curr Biol 19:398-403. 2009
    ....
  39. ncbi Lack of long-term cortical reorganization after macaque retinal lesions
    Stelios M Smirnakis
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, D 72076 Tubingen, Germany
    Nature 435:300-7. 2005
    ..Electrophysiology experiments corroborated the fMRI results. This indicates that adult macaque V1 has limited potential for reorganization in the months following retinal injury...
  40. ncbi High-resolution (1)H chemical shift imaging in the monkey visual cortex
    Christoph Juchem
    Max Planck Institute for Biological Cybernetics, Department Physiology of Cognitive Processes, Tubingen, Germany
    Magn Reson Med 54:1541-6. 2005
    ..Concentration ratios of white matter versus gray matter tissue as well as between metabolites matched those reported in the literature from healthy human brain, demonstrating the consistency and reliability of the procedure...
  41. ncbi Improvement of visual contrast detection by a simultaneous sound
    Michael Lippert
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Brain Res 1173:102-9. 2007
    ..Altogether our findings suggest that cross-modal influences in such simple detection tasks are not exclusively mediated by hard-wired sensory integration but rather point to a prominent role for cognitive and attention-like effects...
  42. pmc Visually driven activation in macaque areas V2 and V3 without input from the primary visual cortex
    Michael C Schmid
    Max Planck Institut für biologische Kybernetik, Tubingen, Germany
    PLoS ONE 4:e5527. 2009
    ..Such pathways may contribute to the behavioral phenomenon of blindsight...
  43. ncbi The effect of image scrambling on visual cortical BOLD activity in the anesthetized monkey
    Gregor Rainer
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, D 72076 Tubingen, Germany
    Neuroimage 16:607-16. 2002
    ..This suggests that low-level accounts for reduced BOLD activation in higher visual areas cannot be completely ruled out based on scrambling data...
  44. ncbi The duration of 3-d form analysis in transformational apparent motion
    Peter Ulric Tse
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    Percept Psychophys 64:244-65. 2002
    ..We conclude that perception of TAM follows an analysis of 3-D form that takes approximately 100 msec. This stage of form analysis may be common to both TAM and second-order motion...
  45. ncbi Robust controlled functional MRI in alert monkeys at high magnetic field: effects of jaw and body movements
    Georgios A Keliris
    Max Planck Institute for Biological Cybernetics, Spemannstr 38, 72076 Tuebingen, Germany
    Neuroimage 36:550-70. 2007
    ..It is anticipated that the techniques presented here will prove useful for alert monkey fMRI at any magnetic field...
  46. ncbi Tuning to sound frequency in auditory field potentials
    Christoph Kayser
    Max Planck Institute for Biological Cybernetics, Speemannstr 38, 72076 Tuebingen, Germany
    J Neurophysiol 98:1806-9. 2007
    ....
  47. pmc Individuation and holistic processing of faces in rhesus monkeys
    Christoph D Dahl
    Max Planck Institute for Biological Cybernetics, Tübingen 72012, Germany
    Proc Biol Sci 274:2069-76. 2007
    ..These experiments show that macaques naturally display the distinguishing characteristics of face processing seen in humans and provide the first clear demonstration that holistic information guides scan paths for conspecific faces...
  48. ncbi Neuroperception: facial expressions linked to monkey calls
    Asif A Ghazanfar
    Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    Nature 423:937-8. 2003
  49. ncbi A novel functional magnetic resonance imaging compatible search-coil eye-tracking system
    Axel Oeltermann
    Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
    Magn Reson Imaging 25:913-22. 2007
    ..It can therefore be of great importance for studies requiring accurate fixation of a target, or measurement and study of the subject's oculomotor system...
  50. doi Neurophysiology of the BOLD fMRI signal in awake monkeys
    Jozien B M Goense
    Department of Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Tuebingen, Germany
    Curr Biol 18:631-40. 2008
    ..One important question raised by the aforementioned investigation is whether the reported correlations also apply to alert subjects...
  51. ncbi Visual categorization shapes feature selectivity in the primate temporal cortex
    Natasha Sigala
    Max Planck Institute for Biological Cybernetics, Tuebingen, Germany
    Nature 415:318-20. 2002
    ..These findings demonstrate that stimulus features important for categorization are instantiated in the activity of single units (neurons) in the primate inferior temporal cortex...
  52. doi fMRI and its interpretations: an illustration on directional selectivity in area V5/MT
    Andreas Bartels
    Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    Trends Neurosci 31:444-53. 2008
    ..We conclude that fMRI constitutes a complement, not a poor-resolution substitute, to invasive techniques, and that it deserves interpretations that acknowledge its stand as a separate signal...
  53. ncbi Stable perception of visually ambiguous patterns
    David A Leopold
    Max Planck Institut für biologische Kybernetik, Spemannstrabetae 38, 72076 Tubingen, Germany
    Nat Neurosci 5:605-9. 2002
    ..These findings indicate that uninterrupted subjective perception of an ambiguous pattern is required for the initiation of the brain-state changes underlying multistable vision...
  54. ncbi Three-dimensional shape representation in monkey cortex
    Margaret E Sereno
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    Neuron 33:635-52. 2002
    ..This distributed network of areas cuts across both "what" and "where" processing streams, reflecting multiple uses for 3D shape representation in perception, recognition, and action...
  55. doi A voice region in the monkey brain
    Christopher I Petkov
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Nat Neurosci 11:367-74. 2008
    ....
  56. ncbi Visual processing in the ketamine-anesthetized monkey. Optokinetic and blood oxygenation level-dependent responses
    David A Leopold
    Max Planck Institut für biologische Kybernetik, Spemannstrasse 38, 72076 Tubingen, Germany
    Exp Brain Res 143:359-72. 2002
    ....
  57. doi Mass spectrometry-based neurochemical analysis: perspectives for primate research
    Xiaozhe Zhang
    Department of Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Tubingen, 72076, Germany
    Expert Rev Proteomics 5:641-52. 2008
    ..We specifically highlight perspectives for the use of MS for brain functional studies and drug discovery in nonhuman primates...
  58. ncbi fMRI of the temporal lobe of the awake monkey at 7 T
    Jozien B M Goense
    Max Planck Institute for Biological Cybernetics, Department of Physiology of Cognitive Processes, Spemannstrasse 38, 72076 Tubingen, Germany
    Neuroimage 39:1081-93. 2008
    ..This allows fMRI of areas that normally suffer from artifact and thus more reliable whole-brain studies...
  59. ncbi Simultaneous EEG and fMRI in the macaque monkey at 4.7 Tesla
    Michael C Schmid
    Max Planck Institute for Biological Cybernetics, D 72076 Tubingen, Germany
    Magn Reson Imaging 24:335-42. 2006
    ..In conclusion, simultaneous EEG/fMRI acquisition is feasible in the macaque monkey preparation at 4.7 T and holds promise for investigating the neural processes that give rise to particular EEG patterns...
  60. pmc The effect of learning on the function of monkey extrastriate visual cortex
    Gregor Rainer
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    PLoS Biol 2:E44. 2004
    ..This suggests that V4 plays a key role in resolving indeterminate visual inputs by coordinated interaction between bottom-up and top-down processing streams...
  61. ncbi Fixations in natural scenes: interaction of image structure and image content
    Christoph Kayser
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Vision Res 46:2535-45. 2006
    ..These results question theories, which suggest that initial fixations are driven by stimulus structure whereas later fixations are determined by informative scene content...
  62. ncbi Anatomical and functional MR imaging in the macaque monkey using a vertical large-bore 7 Tesla setup
    Josef Pfeuffer
    Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, 72012 Tübingen, Germany
    Magn Reson Imaging 22:1343-59. 2004
    ..The exquisite sensitivity of the system and the increased specificity of the hemodynamic signals promise further insights into the relationship of the latter to the underlying physiological activity...
  63. ncbi Mapping cortical activity elicited with electrical microstimulation using FMRI in the macaque
    Andreas S Tolias
    Max Planck Institute for Biological Cybernetics, Tuebingen 72076, Germany
    Neuron 48:901-11. 2005
    ..Consistent with this functional transynaptic spread we also obtained activation in expected projection sites in extrastriate visual areas, demonstrating the utility of our technique in uncovering in vivo functional connectivity maps...
  64. pmc Causal relationships between frequency bands of extracellular signals in visual cortex revealed by an information theoretic analysis
    Michel Besserve
    Max Plack Institute for Biological Cybernetics, Spemannstrasse 38, 72076, Tuebingen, Germany
    J Comput Neurosci 29:547-66. 2010
    ....
  65. doi Flexible, phase-matched, linear receive arrays for high-field MRI in monkeys
    Jozien Goense
    Department of Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    Magn Reson Imaging 28:1183-91. 2010
    ..Performance of a variety of arrangements of gapped linear arrays was evaluated at 4.7 and 7T in high-resolution anatomical and functional MRI...
  66. doi Integration of EEG source imaging and fMRI during continuous viewing of natural movies
    Kevin Whittingstall
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, Tubingen, Germany
    Magn Reson Imaging 28:1135-42. 2010
    ..This is especially useful in combined EEG/fMRI experiments, where one can now potentially study neural-hemodynamic relationships across the whole brain volume in a noninvasive manner...
  67. pmc The role of the primary visual cortex in perceptual suppression of salient visual stimuli
    Georgios A Keliris
    Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    J Neurosci 30:12353-65. 2010
    ..g., synchronization), not necessarily altering the firing rates of single cells or the LFP power dramatically...
  68. pmc Millisecond encoding precision of auditory cortex neurons
    Christoph Kayser
    Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    Proc Natl Acad Sci U S A 107:16976-81. 2010
    ..In addition, they highlight the importance of millisecond-precise neural coding as general functional principle of auditory processing--from the periphery to cortex...
  69. pmc Functional imaging reveals numerous fields in the monkey auditory cortex
    Christopher I Petkov
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    PLoS Biol 4:e215. 2006
    ..The findings can now guide neurophysiological recordings in the monkey to expand our understanding of the processing within these fields. Additionally, this work will improve fMRI investigations of the human auditory cortex...
  70. ncbi Negative functional MRI response correlates with decreases in neuronal activity in monkey visual area V1
    Amir Shmuel
    Max Planck Institute for Biological Cybernetics, Spemannstr 38, 72076 Tuebingen, Germany
    Nat Neurosci 9:569-77. 2006
    ..The NBR was associated with comparable decreases in local field potentials and multiunit activity. Our findings indicate that a significant component of the NBR originates in neuronal activity decreases...
  71. ncbi Temporal frequency and contrast tagging bias the type of competition in interocular switch rivalry
    Michael A Silver
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, D 72076 Tubingen, Germany
    Vision Res 47:532-43. 2007
    ..The results are consistent with a model in which the brain combines information across multiple visual features to resolve ambiguities in visual inputs...
  72. pmc Spatio-temporal point-spread function of fMRI signal in human gray matter at 7 Tesla
    Amir Shmuel
    Center for MR Research, University of Minnesota Medical School, 2021 6th St SE, Minneapolis, MN, USA
    Neuroimage 35:539-52. 2007
    ..The choice of optimal stimulus duration represents a trade-off between the spatial specificity and the overhead associated with short stimulus duration...
  73. doi Color and shape interactions in the recognition of natural scenes by human and monkey observers
    Stefanie Liebe
    Department of Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    J Vis 9:14.1-16. 2009
    ..Our results demonstrate that humans as well as non-human primates exploit their sensory ability of color vision to achieve higher performance in visual recognition tasks especially when shape features are degraded...
  74. doi Functional magnetic resonance imaging of awake behaving macaques
    Jozien B M Goense
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, D 72076 Tubingen, Germany
    Methods 50:178-88. 2010
    ..Here, we discuss the specific challenges and benefits of fMRI in the awake monkey and review the methodologies and strategies for scanning behaving macaques...
  75. doi Binocular rivalry: a time dependence of eye and stimulus contributions
    Andreas Bartels
    Centre for Integrative Neuroscience, University of Tubingen, Tubingen, Germany
    J Vis 10:3. 2010
    ..Their co-varying change may be due to feedback from image- to eye-of-origin representations...
  76. pmc Relationship of the BOLD signal with VEP for ultrashort duration visual stimuli (0.1 to 5 ms) in humans
    Bariş Yeşilyurt
    Max Planck Institute for Biological Cybernetics, High Field Magnetic Resonance Center, Tubingen, Germany
    J Cereb Blood Flow Metab 30:449-58. 2010
    ..These results extend earlier findings regarding VEP-BOLD coupling and highlight the component- and context-dependency of the relationship between evoked potentials and hemodynamic responses...
  77. doi Comparison of pattern recognition methods in classifying high-resolution BOLD signals obtained at high magnetic field in monkeys
    Shih pi Ku
    Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
    Magn Reson Imaging 26:1007-14. 2008
    ..An important factor in overall classification performance is careful preprocessing of the data, including dimensionality reduction, voxel selection and outlier elimination...
  78. doi Frequency-band coupling in surface EEG reflects spiking activity in monkey visual cortex
    Kevin Whittingstall
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    Neuron 64:281-9. 2009
    ..This finding may open up a new dimension in the use and interpretation of EEG in normal and pathological conditions...
  79. doi Spike-phase coding boosts and stabilizes information carried by spatial and temporal spike patterns
    Christoph Kayser
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Neuron 61:597-608. 2009
    ..In addition, they propose a role of slow cortical rhythms in stabilizing sensory representations by reducing effects of noise...
  80. doi Visual enhancement of the information representation in auditory cortex
    Christoph Kayser
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Curr Biol 20:19-24. 2010
    ....
  81. doi Multisensory interactions in primate auditory cortex: fMRI and electrophysiology
    Christoph Kayser
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Hear Res 258:80-8. 2009
    ....
  82. doi Frontoparietal activity with minimal decision and control in the awake macaque at 7 T
    Steffen Stoewer
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, Tuebingen, Germany
    Magn Reson Imaging 28:1120-8. 2010
    ..Similar to human imaging results the update of visual input was enough to activate an extensive network of frontoparietal cortex in the macaque brain, a network which is normally associated with complex cognitive control processes...
  83. doi Electric stimulation fMRI of the perforant pathway to the rat hippocampus
    Santiago Canals
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    Magn Reson Imaging 26:978-86. 2008
    ..In addition, we found a frequency-dependent spatial pattern of activation. With stimulation protocols and train frequencies used for kindling, the activity strongly spreads ipsilaterally through the hippocampus, DG, subiculum and EC...
  84. ncbi High-resolution fMRI of macaque V1
    Jozien B M Goense
    Department of Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    Magn Reson Imaging 25:740-7. 2007
    ..Notably, this very same layer coincided with the largest relaxivity changes as observed in steady-state cerebral blood volume measurements, using the intravascular agent monocrystalline iron oxide nanoparticles (MION)...
  85. ncbi Quantification of cerebral blood flow in nonhuman primates using arterial spin labeling and a two-compartment model
    Anne Catherin Zappe
    Department of Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    Magn Reson Imaging 25:775-83. 2007
    ..The CBF values in the occipital lobe of the monkey brain quantified with ASL are higher than previously reported in positron emission tomography studies...
  86. pmc Auditory looming perception in rhesus monkeys
    Asif A Ghazanfar
    Max Planck Institute for Biological Cybernetics, Spemanstrasse 38, 72076 Tubingen, Germany
    Proc Natl Acad Sci U S A 99:15755-7. 2002
    ..These response biases to looming sounds are consistent with an evolved neural mechanism that processes approaching objects with priority...
  87. ncbi High-field localized 1H NMR spectroscopy in the anesthetized and in the awake monkey
    Josef Pfeuffer
    Department of Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    Magn Reson Imaging 22:1361-72. 2004
    ..The corrected spectra obtained from the awake monkey afforded the reliable detection of 6-10 cerebral metabolites of 1-ml volumes...
  88. ncbi Functional imaging reveals visual modulation of specific fields in auditory cortex
    Christoph Kayser
    Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    J Neurosci 27:1824-35. 2007
    ..Together, these findings reveal multisensory modulation of auditory processing prominently in caudal fields but also at the lowest stages of auditory cortical processing...
  89. ncbi Combined passive and active shimming for in vivo MR spectroscopy at high magnetic fields
    Christoph Juchem
    Max Planck Institute for Biological Cybernetics, Department of Physiology of Cognitive Processes, Spemannstrasse 38, 72076 Tubingen, Germany
    J Magn Reson 183:278-89. 2006
    ....
  90. ncbi Laminar specificity in monkey V1 using high-resolution SE-fMRI
    Jozien B M Goense
    Department of Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, 72076 Tubingen, Germany
    Magn Reson Imaging 24:381-92. 2006
    ..This way, it was possible to acquire high-spatial and high-temporal resolution SE-fMRI data...
  91. ncbi Mechanisms for allocating auditory attention: an auditory saliency map
    Christoph Kayser
    Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    Curr Biol 15:1943-7. 2005
    ..In any case, our results demonstrate that different primate sensory systems rely on common principles for extracting relevant sensory events...
  92. ncbi Integration of touch and sound in auditory cortex
    Christoph Kayser
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Neuron 48:373-84. 2005
    ..These findings demonstrates that multisensory integration occurs early and close to primary sensory areas and--because it occurs in anaesthetized animals--suggests that this integration is mediated by preattentive bottom-up mechanisms...
  93. ncbi Do early sensory cortices integrate cross-modal information?
    Christoph Kayser
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Brain Struct Funct 212:121-32. 2007
    ..Only then will we be able to determine whether early cross-modal interactions truly merit the label sensory integration, and how they increase a sensory system's ability to scrutinize its environment and finally aid behavior...
  94. ncbi Integration of local features into global shapes: monkey and human FMRI studies
    Zoe Kourtzi
    Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
    Neuron 37:333-46. 2003
    ..These findings suggest that unified shape perception in both monkeys and humans involves multiple visual areas that may integrate local elements to global shapes at different spatial scales...
  95. ncbi Capillary hydrophilic interaction chromatography/mass spectrometry for simultaneous determination of multiple neurotransmitters in primate cerebral cortex
    Xiaozhe Zhang
    Max Plank Institute for Biological Cybernetics, 72076 Tubingen, Germany
    Rapid Commun Mass Spectrom 21:3621-8. 2007
    ..We conclude that HILIC/MS/MS combined with the push-pull sampling method represents a sensitive technique for simultaneous monitoring of neurotransmitters from EBF samples...
  96. ncbi The effect of labeling parameters on perfusion-based fMRI in nonhuman primates
    Anne C Zappe
    Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Tubingen, Germany
    J Cereb Blood Flow Metab 28:640-52. 2008
    ..However, the effect of the PLD on fCBF was smaller than on baseline CBF. These results are of importance for high-resolution applications, and when accurate quantification is required for studies in monkeys as well as in humans...
  97. ncbi Very slow activity fluctuations in monkey visual cortex: implications for functional brain imaging
    David A Leopold
    Max Planck Institut für biologische Kybernetik, Spemannstrasse 38, 72076 Tubingen, Germany
    Cereb Cortex 13:422-33. 2003
    ..The results are discussed in the context of combined fMRI/electrophysiological recordings...
  98. doi Visual modulation of neurons in auditory cortex
    Christoph Kayser
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tubingen, Germany
    Cereb Cortex 18:1560-74. 2008
    ..These neurons thus meet the criteria for sensory integration and provide the auditory modality with multisensory contextual information about co-occurring environmental events...
  99. pmc The effect of a serotonin-induced dissociation between spiking and perisynaptic activity on BOLD functional MRI
    Alexander Rauch
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, D 72076 Tubingen, Germany
    Proc Natl Acad Sci U S A 105:6759-64. 2008
    ..We discuss implications of this finding for the interpretation of BOLD activity...
  100. doi Direct measurement of oxygen extraction with fMRI using 6% CO2 inhalation
    Anne C Zappe
    Max Planck Institute for Biological Cybernetics, Department of Physiology of Cognitive Processes, Tubingen, Germany
    Magn Reson Imaging 26:961-7. 2008
    ..These observations suggest that the fMRI response to a sensory stimulus for 6% CO2 inhalation occurs in the absence of a hemodynamic response, and it therefore directly reflects oxygen extraction into the tissue...
  101. ncbi A binocular rivalry study of motion perception in the human brain
    K Moutoussis
    Max Planck Institute for Biological Cybernetics, Spemannstrasse 38, 72076 Tuebingen, Germany
    Vision Res 45:2231-43. 2005
    ....