Abstract
Effects of the repetitive current pulses of microstimulation on spatio-temporal neuronal excitations in the primary visual cortex in mouse cerebral slices in vitro were examined by utilizing the voltage-sensitive dye imaging technique. The amplitude and spatial extent of the population spike directly induced by the stimulus pulse was significantly reduced in response to successive stimulus pulses at 200 Hz. This suggested that the high-frequency microstimulation may not be efficient for inducing the neuronal spiking, at least, in vitro.
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