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Spatiotemporal Processing of Linear Acceleration: Primary Afferent and Central Vestibular Neuron Responses
 

Summary: Spatiotemporal Processing of Linear Acceleration: Primary Afferent
and Central Vestibular Neuron Responses
DORA E. ANGELAKI AND J. DAVID DICKMAN
Department of Neurobiology, Washington University School of Medicine; and Department of Research,
Central Institute for the Deaf, St. Louis, Missouri 63110
Received 10 March 2000; accepted in final form 2 June 2000
Angelaki, Dora E. and J. David Dickman. Spatiotemporal process-
ing of linear acceleration: primary afferent and central vestibular
neuron responses. J Neurophysiol 84: 21132132, 2000. Spatiotem-
poral convergence and two-dimensional (2-D) neural tuning have
been proposed as a major neural mechanism in the signal processing
of linear acceleration. To examine this hypothesis, we studied the
firing properties of primary otolith afferents and central otolith neu-
rons that respond exclusively to horizontal linear accelerations of the
head (0.1610 Hz) in alert rhesus monkeys. Unlike primary afferents,
the majority of central otolith neurons exhibited 2-D spatial tuning to
linear acceleration. As a result, central otolith dynamics vary as a
function of movement direction. During movement along the maxi-
mum sensitivity direction, the dynamics of all central otolith neurons
differed significantly from those observed for the primary afferent

  

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

 

Collections: Biology and Medicine