Rhythmic and patterned neuronal firing in visual cortex.
We present evidence from multi-electrode recordings that the stimulus driven activity in a region of monkey visual cortex displays synchronous, oscillatory behaviour with temporally changing patterns of firing. The spatial-temporal patterns are dependent on cortical layer and on visual stimulus, 'build up and die down' with a period of 70-100 msec, and cannot be factorized into separate spatial and temporal components. This finding supports neural network models which explicitly incorporate spatial-temporal structure, ruling against a purely spatial code for information processing. The new type of analysis presented here is also suitable for direct on-line interactive analysis during multi-electrode recording experiments. Further, it could be modified for use in human EEG or evoked response recordings.
Shaw
G L
GL
Department of Physics, University of California, Irvine 92717.
Krüger
J
J
Silverman
D J
DJ
Aertsen
A M
AM
Aiple
F
F
Liu
H C
HC
D000200:Action Potentials / Q000502:physiology; D000818:Animals; D002521:Cercopithecus; D003344:Cortical Synchronization; D008839:Microelectrodes; D009415:Nerve Net / Q000502:physiology*; D009474:Neurons / Q000502:physiology*; D010507:Periodicity; D014793:Visual Cortex / Q000166:cytology / Q000502:physiology*