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Computation of Egomotion in the Macaque Cerebellar Vermis

Summary: Computation of Egomotion in the Macaque
Cerebellar Vermis
Dora E. Angelaki & Tatyana A. Yakusheva &
Andrea M. Green & J. David Dickman &
Pablo M. Blazquez
Published online: 11 December 2009
# Springer Science+Business Media, LLC 2009
Abstract The nodulus and uvula (lobules X and IX of the
vermis) receive mossy fibers from both vestibular afferents
and vestibular nuclei neurons and are thought to play a role
in spatial orientation. Their properties relate to a sensory
ambiguity of the vestibular periphery: otolith afferents
respond identically to translational (inertial) accelerations
and changes in orientation relative to gravity. Based on
theoretical and behavioral evidence, this sensory ambiguity
is resolved using rotational cues from the semicircular
canals. Recordings from the cerebellar cortex have identi-
fied a neural correlate of the brain's ability to resolve this
ambiguity in the simple spike activities of nodulus/uvula
Purkinje cells. This computation, which likely involves the


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


Collections: Biology and Medicine