In midpontine pretrigeminal Cats single fiber activity from the afferent (geniculo-cortical) and efferent (cortico-fugal) visual cortical tracts was studied in terms of interval distribution of successive spikes under steady, diffuse light stimulations. It was found that both the proportions of fibers which significantly modify their temporal patterns of discharge and the proportions of illumination trials which bring about significant changes in the neuronal interval distributions are very similar...
Transient responses in the multineuronal activity along the visual path ways of encéphale isolé cats were studied during movements of the eyes across a source of light. The time course of the activity bursts depended on selective characteristics of the ocular movements. When the movements were active and "fast", the transient increase in firing rate of the geniculo-cortical and corticofugal neurons preceded the burst of activity photically evoked in the optic chiasma. When the movements were passive...
As is known, the visual scene is perceived stationary during active eye movements. An attempt to explain such a perceptual phenomenon has been that at the time of an active eye movement, the efferent motor discharge would be accompanied by a concurrent discharge into the central visual system, capable of counteracting those changes in retinal activation resulting from the ocular movement itself (corollary discharge theory). Only indirect psychophysic and electrophysiological data agree with such...
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