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Rapid communication contribution of vestibular commissural pathways to spatial orientation of the angular vestibuloocular reflex.
| Content Provider | CiteSeerX |
|---|---|
| Author | Wearne, Susan Raphan, Theodore Cohen, Bernard |
| Abstract | bution of vestibular commissural pathways to spatial orientation and horizontal components of eye movements were re-of the angular vestibuloocular reflex. J. Neurophysiol. 78: 1193 – corded. Here we analyze three-dimensional eye movements 1197, 1997. During nystagmus induced by the angular vestibulooc- to determine whether GIA tilts with regard to the head in ular reflex (aVOR), the axis of eye velocity tends to align with any direction would affect the trajectories of eye velocitythe direction of gravitoinertial acceleration (GIA), a process we after velocity storage is abolished leaving only the directterm ‘‘spatial orientation of the aVOR.’ ’ We studied spatial orienta-pathways intact.tion of the aVOR in rhesus and cynomolgus monkeys before and after midline section of the rostral medulla abolished all oculomotor functions related to velocity storage, leaving the direct optokinetic M E T H O D Sand vestibular pathways intact. Optokinetic afternystagmus and the bias component of off-vertical-axis rotation were lost, and the Juvenile rhesus monkeys (M502 and M613) were prepared with aVOR time constant was reduced to a value commensurate with eye coils to record eye position in three dimensions, and the midlinethe time constants of primary semicircular canal afferents. Spatial was surgically sectioned in the rostral medulla. The experiments orientation of the aVOR, induced either during optokinetic or ves- |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Angular Vestibuloocular Reflex Vestibular Commissural Pathway Spatial Orientation Rapid Communication Contribution Velocity Storage Rostral Medulla Three-dimensional Eye Movement Bias Component Optokinetic Afternystagmus Directterm Spatial Orientation Gravitoinertial Acceleration Midline Section Cynomolgus Monkey Eye Coil Eye Movement Direct Optokinetic Sand Vestibular Pathway Primary Semicircular Canal Afferent Eye Velocity Spatial Orienta-pathways Intact Value Commensurate Avor Time Constant Ular Reflex Gia Tilt Angular Vestibulooc Horizontal Component Midlinethe Time Constant Eye Position Off-vertical-axis Rotation Eye Velocitythe Direction Juvenile Rhesus Monkey Oculomotor Function Experiment Orientation |
| Content Type | Text |
