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Summary: Exp Brain Res (2004) 155: 8190
DOI 10.1007/s00221-003-1693-0
RESEARCH ARTICLE
Asim Haque . Dora E. Angelaki . J. David Dickman
Spatial tuning and dynamics of vestibular semicircular canal
afferents in rhesus monkeys
Received: 27 January 2003 / Accepted: 19 August 2003 / Published online: 11 November 2003
# Springer-Verlag 2003
Abstract Rotational head motion in vertebrates is de-
tected by the three semicircular canals of the vestibular
system whose innervating primary afferent fibers encode
movement information in specific head planes. In order to
further investigate the nature of vestibular central proces-
sing of rotational motion in rhesus monkeys, it was first
necessary to quantify afferent information coding in this
species. Extracellular recordings were performed to
determine the spatial and dynamic properties of semicir-
cular canal afferents to rotational motion in awake rhesus
monkeys. We found that the afferents innervating specific
semicircular canals had maximum sensitivity vectors that
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