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Eye Proprioception Used for Visual Localization Only If in Conflict with the Oculomotor Plan

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Author(s)

Daniela Balslev, Marc Himmelbach, Hans-Otto Karnath, Svenja Borchers, Bartholomaeus Odoj

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Abstract

Both the corollary discharge of the oculomotor command and eye muscle proprioception provide eye position information to the brain. Two contradictory models have been suggested about how these two sources contribute to visual localization: (1) only the efference copy is used whereas proprioception is a slow recalibrator of the forward model, and (2) both signals are used together as a weighted average. We had the opportunity to test these hypotheses in a patient (R.W.) with a circumscribed lesion of the right postcentral gyrus that overlapped the human eye proprioceptive representation. R.W. was as accurate and precise as the control group (n = 19) in locating a lit LED that she viewed through the eye contralateral to the lesion. However, when the task was preceded by a brief (

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Original languageEnglish
Pages (from-to)8569-8573
Number of pages5
JournalThe Journal of Neuroscience
Volume32
Issue number25
DOIs
StatePublished - 20 Jun 2012

    Research areas

  • SOMATOSENSORY CORTEX, POSITION INFORMATION, OCULAR MUSCLES, EFFERENCE COPY, REPRESENTATION, DIRECTION, SAMPLES, INFLOW, HUMANS, AREAS

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