Horizontal and vertical vestibulo-ocular and cervico-ocular reflexes in the monkey during high frequency rotation |
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Authors: | Andreas B hmer,Volker Henn |
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Affiliation: | 1. Laboratoire de Physiologie du Travail du CNRS, CHU Pitie Salpetriere, 91 Boulevard de l''Hopital, 75634 Paris Cedex 13, France;2. Laboratoire de Physiologie du Travail de l''EPHE et Laboratoire de Physiologie, INSERM U3, Hopital de la Salpetriere, 47 Boulevard de l''Hopital, 75013 Paris, France |
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Abstract: | In the alert monkey the horizontal vestibulo-ocular reflex (VOR) is basically compensatory over the range of 0.5 to 6 Hz with a gain near unity, and with the phase of the compensatory eye position having a minimal lag with respect to head position. Typical frequency-dependent eye movement patterns were observed. Vertical VOR is also compensatory having the same phase relations but with a reduced gain (-2.5 to -3.7 dB). In this range, vestibular input appears to be the predominant sensory influence on reflex eye movements. Additional optokinetic reflexes do not improve the VOR above 0.5 Hz. The horizontal cervico-ocular reflex (COR) is minimal or absent in normal monkeys. |
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Keywords: | eye movements nystagmus vestibulo-ocular reflex cervico-ocular reflex |
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