Vol. 69. No. 6. June 1093. f'rltltcdIII I'.S..d.
Encoding of Head Acceleration in Vestibular Neurons
I. Spatiotemporal Response Properties to Linear Acceleration
GEOFFREY A. BUSH, ADRIAN A. PERACHIO, AND DORA E. ANGELAKI
Departments of Otolaryngology, Physiology and Biophysics, and Anatomy and Neurosciences, University of Texas.
Medical Branch, Galveston, Texas 77.555-l 063
SUMMARY AND CONCLUSIONS
I. Extracellular recordings were made in and around the me-
dial vestibular nuclei in decerebrated rats. Neurons were function-
ally identified according to their semicircular canal input on the
basis of their responses to angular head rotations around the yaw,
pitch, and roll head axes. Those cells responding to angular acceler-
ation were classified as either horizontal semicircular canal-re-
lated (HC) or vertical semicircular canal-related (VC) neurons.
The HC neurons were further characterized as either type I or type
II, depending on the direction of rotation producing excitation.
Cells that lacked a response to angular head acceleration, but ex-
hibited sensitivity to a change in head position, were classified as
purely otolith organ-related (OTO) neurons. All vestibular neu-