[The responses of frog vestibular neurons to the combined temperature microstimulation of the semicircular canals].
Controlled temperature microstimulation of the frog semicircular canal (heating of 2 sec duration, peak amplitude from 0.5 to 5.0 degrees C above the temperature level of the labyrinth, 17-19 degrees C) may be considered as an analogue of angular acceleration in the plane of the canal. Combined temperature microstimulation of some canals may be considered as a physical model of complicated space rotations. Responses of the frog vestibular nuclei's neurons (n = 278) to temperature microstimulation showed that 80% of them had inputs from 1-2 canals and only 20% of neurons--from 3-6 canals. 201 neurons (72.3%) had ipsilateral inputs only; 14 neurons (5%)--contralateral ones only; 63 neurons (22.7%) had both inputs. The most effective excitatory inputs were ipsilateral horizontal, ipsilateral posterior and contralateral posterior canals; the least effective were contralateral horizontal and contralateral anterior canals. Latent canal inputs (excitatory as well as inhibitory) seem to exist as revealed in combination with the effective inputs.
Tsoĭ
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Orlov
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Vovk
T V
TV
D000818:Animals; D008297:Male; D008839:Microelectrodes; D009474:Neurons / Q000502:physiology*; D010812:Physical Stimulation / Q000295:instrumentation / Q000379:methods; D011896:Rana temporaria; D012665:Semicircular Canals / Q000502:physiology*; D013696:Temperature; D014726:Vestibular Nuclei / Q000502:physiology*
Otvety vestibuliarnykh neĭronov liagushki na kombinirovannuiu temperaturnuiu mikrostimuliatsiiu polukruzhnykh kanalov.