Perception of tilt and ocular torsion of vestibular patients during eccentric rotation.

Abstract:

:Four patients following unilateral vestibular loss and four patients complaining of otolith-dependent vertigo were tested during eccentric yaw rotation generating 1 x g centripetal acceleration directed along the interaural axis. Perception of body tilt in roll and in pitch was recorded in darkness using a somatosensory plate that the subjects maintained parallel to the perceived horizon. Ocular torsion was recorded by a video camera. Unilateral vestibular-defective patients underestimated the magnitude of the roll tilt and had a smaller torsion when the centrifugal force was towards the operated ear compared to the intact ear and healthy subjects. Patients with otolithic-dependent vertigo overestimated the magnitude of roll tilt in both directions of eccentric rotation relative to healthy subjects, and their ocular torsion was smaller than in healthy subjects. Eccentric rotation is a promising tool for the evaluation of vestibular dysfunction in patients. Eye torsion and perception of tilt during this stimulation are objective and subjective measurements, which could be used to determine alterations in spatial processing in the CNS.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Clément G,Deguine O

doi

10.1016/j.neulet.2009.10.090

subject

Has Abstract

pub_date

2010-01-04 00:00:00

pages

161-5

issue

2

eissn

0304-3940

issn

1872-7972

pii

S0304-3940(09)01447-5

journal_volume

468

pub_type

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