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Representation of Neck Velocity and Neck-Vestibular Interactions in Pursuit Neurons in the Simian Frontal Eye Fields

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Title: Representation of Neck Velocity and Neck-Vestibular Interactions in Pursuit Neurons in the Simian Frontal Eye Fields
Authors: Fukushima, Kikuro Browse this author →KAKEN DB
Akao, Teppei Browse this author
Saito, Hiroshi Browse this author →KAKEN DB
Kurkin, Sergei A. Browse this author →KAKEN DB
Fukushima, Junko Browse this author →KAKEN DB
Peterson, Barry W. Browse this author
Keywords: coordinate frame
frontal eye fields
neck proprioception
smooth pursuit
vestibular system
Issue Date: May-2010
Publisher: Oxford University Press
Journal Title: Cerebral Cortex
Volume: 20
Issue: 5
Start Page: 1195
End Page: 1207
Publisher DOI: 10.1093/cercor/bhp180
Abstract: The smooth pursuit system must interact with the vestibular system to maintain the accuracy of eye movements in space (i.e., gaze-movement) during head movement. Normally, the head moves on the stationary trunk. Vestibular signals cannot distinguish whether the head or whole body is moving. Neck proprioceptive inputs provide information about head movements relative to the trunk. Previous studies have shown that the majority of pursuit neurons in the frontal eye fields (FEF) carry visual information about target velocity, vestibular information about whole-body movements, and signal eye- or gaze-velocity. However, it is unknown whether FEF neurons carry neck proprioceptive signals. By passive trunk-on-head rotation, we tested neck inputs to FEF pursuit neurons in 2 monkeys. The majority of FEF pursuit neurons tested that had horizontal preferred directions (87%) responded to horizontal trunk-on-head rotation. The modulation consisted predominantly of velocity components. Discharge modulation during pursuit and trunk-on-head rotation added linearly. During passive head-on-trunk rotation, modulation to vestibular and neck inputs also added linearly in most neurons, although in half of gaze-velocity neurons neck responses were strongly influenced by the context of neck rotation. Our results suggest that neck inputs could contribute to representing eye- and gaze-velocity FEF signals in trunk coordinates.
Type: article
Appears in Collections:保健科学院・保健科学研究院 (Graduate School of Health Sciences / Faculty of Health Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 福島 順子

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