[Responses of frog midbrain auditory center neurons to exposure to amplitude-modulated tones].
Responses of single units in torus semicircularis of the lake frog (Rana ridibunda) to sinusoidal (10-30%) amplitude-modulated tone of the characteristic frequency was usually much more intensive than responses to the pure tone of the same frequency. The variation of the amplitude reproduction in the discharge rate of the neurons as a function of modulation frequency was analyzed from cycle histograms locked to the modulation waveform. In some units the degree of modulation of the spike rate monotonically decreased with the modulation frequency rise, the other units showed a peak within the range of modulation frequencies 10-20 Hz. Usually modulations of the phase histogram substantially exceeded the modulation of the stimulus. The phase angle between the maximum of the stimulus envelope and the maximum of cycle histogram substantially exceeded the modulation of the stimulus. The phase angle between the maximum of the stimulus envelope and the maximum of cycle histogram was linearly connected with the modulation frequency increase.
D000161:Acoustic Stimulation / Q000379:methods; D000200:Action Potentials; D000818:Animals; D001001:Anura; D001306:Auditory Pathways / Q000502:physiology; D001307:Auditory Perception / Q000502:physiology*; D001931:Brain Mapping; D008636:Mesencephalon / Q000502:physiology*; D011898:Ranidae
Reaktsii neĭronov slukhovogo tsentra mozga liagushki na deĭstvie amplitudno-modulirovannykh tonov.