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Vestibular stimulation affects dichotic lexical decision performance.

H Schüeli·V Henn·P Brugger
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Abstract

We report an experimental attempt to shift, by vestibular stimulation, healthy subjects' right ear advantage (REA) in a dichotic listening (DL) task with words and nonwords as stimuli. Forty right-handed men performed the task under two different conditions, once while sitting in a stationary turning chair (baseline) and once during sinusoidal rotation. In this latter condition, every other stimulation was received during maximal left-to-right (i.e., clockwise), every other during maximal right-to-left (i.e., counterclockwise) acceleration. There was a reliable REA for lexical decision accuracy in the baseline and right-to-left trials but not during left-to-right rotation. While right ear performance was unaffected by rotation, there were more correct lexical decisions to left ear targets exclusively during left-to-right turns (one-tailed P = 0.05). Since there were no parallel shifts in auditory thresholds under the different conditions, this effect is not due to any hypothetical auditory-vestibular interactions on a primary sensory level. The improvement in left ear DL performance, although small in our study, is comparable to the symptom-alleviating effect of caloric vestibular stimulation in patients with left-sided hemispatial neglect and interpreted as a consequence of a rotation-induced attentional shift towards the left hemispace.

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AdultAnalysis of VarianceDecision MakingDiscrimination, PsychologicalFunctional LateralityGravity SensingHumansMaleProhibitinsRotationSpeech PerceptionVestibule, LabyrinthJournal Article

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BibTeXRIS

H Schüeli, V Henn, P Brugger. 1999. Vestibular stimulation affects dichotic lexical decision performance.. https://doi.org/10.1016/s0028-3932(98)00129-8

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