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Prior activity influences the velocity o ... frog and cat optic nerve fibers
Prior activity influences the velocity of impulses in frog and cat optic nerve fibers.
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Under normal visual stimulation, simultaneous recording from ganglion cells in the retina and from the axons of these cells in the brain revealed activity-dependent differences in the velocity of impulse propagation. In frog ganglion cells, spikes initiated 5-500 ms after a previous impulse showed supernormal increases in conduction velocity of up to 17%; spikes initiated 500-2000 ms after a previous one traveled more slowly than a spike initiated after a long period of rest. Cat ganglion cell impulses showed much smaller supernormality (maximum 3%), but exhibited pronounced slowing due to refractoriness and long-term fatigue associated with their high levels of spontaneous activity.
George SA, Mastronarde DN, Dubin MW
Brain research
1984-06-18 00:00
304
1
121-6
Animals,Axons,Cats,Evoked Potentials, Visual,Geniculate Bodies,Nerve Fibers,Neural Conduction,Optic Nerve,Rana pipiens,Reaction Time,Refractory Period, Electrophysiological,Retinal Ganglion Cells,Superior Colliculus,Synaptic Transmission,Visual Pathways,Visual Perception
Brain Res.
NEI EY-00998, NEI EY-01662
0006-8993
0006-8993(84)90867-9
371
True
6331576
