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Ann. N.Y. Acad. Sci. 1004: 132141 (2003). 2003 New York Academy of Sciences. doi: 10.1196/annals.1303.012
 

Summary: 132
Ann. N.Y. Acad. Sci. 1004: 132­141 (2003). © 2003 New York Academy of Sciences.
doi: 10.1196/annals.1303.012
Dynamic Modulation of Ocular Orientation
during Visually Guided Saccades and
Smooth-Pursuit Eye Movements
BERNHARD J.M. HESSa AND DORA E. ANGELAKIb
aDepartment of Neurology, Zürich University Hospital, Switzerland
bDepartment of Neurobiology, Washington University School of Medicine,
St. Louis, Missouri, USA
ABSTRACT: Rotational disturbances of the head about an off-vertical yaw axis
induce a complex vestibuloocular reflex pattern that reflects the brain's esti-
mate of head angular velocity as well as its estimate of instantaneous head ori-
entation (at a reduced scale) in space coordinates. We show that semicircular
canal and otolith inputs modulate torsional and, to a certain extent, also verti-
cal ocular orientation of visually guided saccades and smooth-pursuit eye
movements in a similar manner as during off-vertical axis rotations in com-
plete darkness. It is suggested that this graviceptive control of eye orientation
facilitates rapid visual spatial orientation during motion.
KEYWORDS: eye movements; vestibular; vestibuloocular; Listing's plane; ocu-

  

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

 

Collections: Biology and Medicine