Slide 6

Synchronization of activity deponds upon stimulus configuration

Recording multiple unit activity in four different locations has revealed that synchronization of oscillatory activity are dependent upon the configuration of the stimuli. In this example, cell pairs 1 and 3, 2 and 4 and 2 and 3 could be relatively synchronized by using different orientations of a moving bar. However, if all four cells were stimulated with two moving bars, then the four neurons synchronized into two groups: 1-3 and 2-4. These groups did not synchronize with one and another (see 2-3 cross-correlogram) indicating that single neurons may be members of various groups of synchronized activity, depending upon stimulus configuration.
From Engel, A.K., Konig, P., Kreiter, A.K., Shillen, T.B. and Singer, E. (1992) Temporal coding in the visual cortex: new vistas on integration in the nervous system. Trends in Neurosciences 15: 218-226.