[Responses of frog primary vestibular afferents to direct vibration of a semicircular canal].
Responses of primary afferents (PA) of lateral semicircular canal to sinusoidal vibration of the canal wall were studied within the range 0.05--200 Hz (mean amplitudes 5--15 microns) in immobilized frogs. Dynamic characteristics (gain, phase) relative linear velocity of the vibrator (micron.s-1-1) were examined. At 0.2 Hz, the gain was 5.35 +/- 3.19 imp-s-1/micro.s-1 (mean; S. D.; n=14) and linearly decreased if the frequency rose. Phase lag of responses relative velocity at 0.05 Hz was 49.8 degrees +/- 16.5 degrees (n=13) and at 1 Hz 97 degrees +/- 9.4 degrees (n=22). At 100 Hz phase lag was about 240 degrees. Three groups of PA were described: wide range PA reacting in the range from 0.05 up to 60--180 Hz; high frequency PA responding in the range from 20--40 up to 100--150 Hz; low frequency PA responding in the range from 0.05 up to 2--20 Hz.
D000818:Animals; D001001:Anura; D002415:Cats; D004594:Electrophysiology; D008297:Male; D009475:Neurons, Afferent / Q000502:physiology; D011896:Rana temporaria; D012665:Semicircular Canals / Q000294:innervation*; D014725:Vestibular Nerve / Q000502:physiology*; D014732:Vibration
Otvety pervichnykh vestibuliarnykh afferentov liagushki na priamuiu vibrostimuliatsiiu polukruzhnogo kanala.