Journal
NEUROREPORT
Volume 11, Issue 7, Pages 1443-1447Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00001756-200005150-00018
Keywords
hippocampus; horizontal eye movement; semicircular canal; utricular; vertical eye movement; vestibular
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Vestibular information modulates hippocampal activity for spatial processing and place cell firing. However, evidence of a purely vestibular stimulus modulating hippocampal activity is confounded as most studies use stimuli containing somatasensory and visual components. In the present study, high-frequency electrical stimulation of specific vestibular sensory regions of the right labyrinth in anaesthetized guinea pigs induced an evoked field potential in the hippocampal formation bilaterally with a latency of about 40 ms following stimulation onset. Field potentials localized in the hippocampal formation occurred with stimulus current parameters that were too small to produce eye movements. This provides direct electrophysiological evidence of vestibular input to the hippocampus. NeuroReport 11:1443-1447 (C) 2000 Lippincott Williams & Wilkins.
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