| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH |
|
|
|
|||||||
|
|||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
* To whom correspondence should be addressed. E-mail: bernhard.ross{at}ieee.org.
The hypothesis that gamma-band oscillations are related to the representation of an environmental scene in the cerebral cortex after binding of corresponding perceptual elements is currently under discussion. One question is how the sensory system reacts to a fast change in the scene if perceptual elements are rigidly bound together. A reset of the gamma-band oscillation forced by a change in sensory input may dissolve the binding, which then would be re-established for the new sensation. We studied the reset of gamma-band oscillations on the 40 Hz auditory steady-state responses (ASSR) by means of whole head magnetoencephalography (MEG). The rhythm of 40-Hz amplitude modulation of a 500-Hz tone evoked the ASSR, and a short noise burst served as a concurrent stimulus. Possible direct interactions of the auditory stimuli were excluded by presenting the noise impulse in a different frequency channel (2,000-3,000 Hz) to the contra-lateral ear. The concurrent stimulus induced a considerable decrement in the amplitude of ASSR, which was localized in primary auditory cortices. This decrement lasted 250 ms and was significantly longer than the duration of the transient gamma-band response evoked by the noise burst. Thus, it could not be explained by any linear superimposition of the responses. The time-courses of ASSR amplitude and phase during recovery from the decrement resembled those after stimulus onset, indicating that a new ASSR was built up after the resetting stimulus. The results are discussed as reset of oscillations in human thalamo-cortical networks.
This article has been cited by other articles:
|
|
 |
|
  N. Ding and J. Z. Simon Neural Representations of Complex Temporal Modulations in the Human Auditory Cortex J Neurophysiol, November 1, 2009; 102(5): 2731 - 2743. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 C. A. Brenner, G. P. Krishnan, J. L. Vohs, W.-Y. Ahn, W. P. Hetrick, S. L. Morzorati, and B. F. O'Donnell Steady State Responses: Electrophysiological Assessment of Sensory Function in Schizophrenia Schizophr Bull, November 1, 2009; 35(6): 1065 - 1077. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 B. Ross, S. A Hillyard, and T. W Picton Temporal Dynamics of Selective Attention during Dichotic Listening Cereb Cortex, September 29, 2009; (2009) bhp201v1. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. A. Pastor, C. Vidaurre, M. A. Fernandez-Seara, A. Villanueva, and K. J. Friston Frequency-Specific Coupling in the Cortico-Cerebellar Auditory System J Neurophysiol, October 1, 2008; 100(4): 1699 - 1705. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. Ross A Novel Type of Auditory Responses: Temporal Dynamics of 40-Hz Steady-State Responses Induced by Changes in Sound Localization J Neurophysiol, September 1, 2008; 100(3): 1265 - 1277. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. Draganova, B. Ross, A. Wollbrink, and C. Pantev Cortical Steady-State Responses to Central and Peripheral Auditory Beats Cereb Cortex, May 1, 2008; 18(5): 1193 - 1200. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. Luo, Y. Wang, D. Poeppel, and J. Z. Simon Concurrent Encoding of Frequency and Amplitude Modulation in Human Auditory Cortex: Encoding Transition J Neurophysiol, December 1, 2007; 98(6): 3473 - 3485. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH |
| Visit Other APS Journals Online |
