Elsevier

Experimental Neurology

Volume 50, Issue 3, March 1976, Pages 579-594
Experimental Neurology

Fastigial neuronal responses to sinusoidal horizontal rotation

https://doi.org/10.1016/0014-4886(76)90028-5Get rights and content

Abstract

The response of single units in the fastigial nucleus of alert monkeys to sinusoidal, horizontal rotation was studied by extracellular recording techniques. Two types of response were found. Type I units increased their firing rates during ipsilateral rotation and decreased their firing rates during contralateral rotation. Type II units increased their activity for contralateral rotation and decreased their activity for ipsilateral rotation. Type I units were located primarily in the caudal portion, while type II units were found predominantly in the rostral portion of the fastigial nucleus. Bode phase and gain plots were derived by comparing the first harmonic determined by the fast Fourier transform of the fastigial neuron responses to the sinusoidal horizontal acceleration input. Gain plots for type I and type II units were similar and were approximately equal to the gain of primary vestibular afferents. Type I and type II units were approximately 180 deg out of phase with each other and both types of response showed a statistically significant increase in phase with increasing frequency.

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1

Supported by NIH grants NS05082, RR00166, RR05432 and EY00745. We would like to thank Professor Patricia D. Daniels, Department of Electrical Engineering, University of Washington, for her invaluable assistance in the preparation of this manuscript.

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