[Relation between midbrain auditory center neuronal responses and sound on-off time ratio in the frog].
The EPs and unit activity of the frog midbrain auditory region were tested during 1,2,5 and 10/sec presentations of the tone bursts. The maximal amplitude of the EPs and the exaltation of unit activity occurred when the burst duration was in the range 10--30 msec. The elongation of the tone bursts led to the increase of the latency and the decrease of the maximal firing rate. The synaptic mechanisms of this suppression are discussed.
D000161:Acoustic Stimulation / Q000379:methods; D000818:Animals; D001306:Auditory Pathways / Q000502:physiology*; D001307:Auditory Perception / Q000502:physiology*; D001931:Brain Mapping; D005072:Evoked Potentials, Auditory; D008636:Mesencephalon / Q000502:physiology*; D010507:Periodicity; D011895:Rana ridibunda; D011930:Reaction Time / Q000502:physiology; D009435:Synaptic Transmission
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