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The Journal of Neuroscience, November 1995, 15(11): 7201-7216 Differential Processing of Semicircular Canal Signals in the
 

Summary: The Journal of Neuroscience, November 1995, 15(11): 7201-7216
Differential Processing of Semicircular Canal Signals in the
Vestibulo-Ocular Reflex
Dora E. Angelaki,' Bernhard J. M. Hess,* and Jun-lchi Suzuki3
`Department of Surgery (Otolaryngology), University of Mississippi Medical Center, Jackson, Mississippi 39216-
4505, 2Department of Neurology, University Hospital Zurich, CH-8091, Switzerland, and 3Department of
Otolaryngblogy, Teikyo University, Tokyo, Japan
Selective semicircular canal inactivation and three-dimen-
sional eye movement recordings have been used to inves-
tigate the spatial organization of vestibular signals in the
vestibulo-ocular reflex (VOR) of rhesus monkeys. In ani-
mals with one pair of semicircular canals inactivated, af-
ferent activity no longer codes all spatial components of
head angular velocity. If it were the activation pattern of
semicircular canal afferents alone that determines VOR
slow phase eye velocity, the head velocity components
along the sensitivity vectors of the remaining intact semi-
circular canals would determine the orientation of slow
phase eye velocity. Thus, angular head velocity and slow
phase eye velocity would not necessarily always align. Al-

  

Source: Angelaki, Dora - Department of Anatomy and Neurobiology, Washington University in St. Louis

 

Collections: Biology and Medicine