title: Neck muscle vibration alters visually-perceived roll after unilateral vestibular loss.
abstract: Unilateral sternocleidomastoid muscle vibration was applied to 21 normal and six unilateral vestibular deafferented (uVD) human subjects at head erect and during 30 degrees left and right whole body roll-tilt. In normal subjects, neck vibration had no effect upon the settings of a visual bar to subjective visual horizontal (SVH) in any roll-tilt condition. In uVD subjects settings to SVH were significantly altered by neck vibration, with ipsilesional neck vibration increasing the SVH bias at head erect. Further, during contralesional roll-tilt, ipsilesional neck vibration in uVD subjects significantly increased the E-effect. These results suggest that compensation after vestibular loss allows cervical signals to influence visual perception of roll-tilt.
authors.affiliation: Department of Psychology, The University of Sydney, NSW, Australia.
authors.forename: G A
authors.initials: GA
authors.lastname: Betts
authors.forename: M
authors.initials: M
authors.lastname: Barone
authors.forename: M
authors.initials: M
authors.lastname: Karlberg
authors.forename: H
authors.initials: H
authors.lastname: MacDougall
authors.forename: I S
authors.initials: IS
authors.lastname: Curthoys
mesh_terms: D000328:Adult; D003714:Denervation; D005260:Female; D006801:Humans; D008297:Male; D009334:Neck Muscles / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D011187:Posture / Q000502:physiology; D011434:Proprioception / Q000502:physiology*; D012016:Reference Values; D012984:Software; D014725:Vestibular Nerve / Q000502:physiology*; D014732:Vibration; D014796:Visual Perception / Q000502:physiology*