Slide 5

Simultaneous recording of two oscillatory cells reveals synchronization of activity when both are driven by the same light bar

Simultaneous recording of two neurons in the visual cortex revealed that their activity could be synchronized if they were activated by the same visual stimulus. In this experiment, the two cells were activated either by one long bar (A, D), two short bars moving in the same direction (B, E), or two bars moving in opposite directions (C., F). Even though the cells were activated equally well by all three stimuli, the degree to which the cells generated synchronous discharges was highest when activated by one long bar, and lowest when they were activated by two short bars moving in opposite directions. This finding suggests that neurons that are activated by the same stimulus and that generate rhythmic oscillations may synchronize with one and another, thereby defining themselves as members of the neural representation of that stimulus.
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.