MST neuronal responses to heading direction during pursuit eye movements

William K. Page, Charles J. Duffy

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

Abstract

As you move through the environment, you see a radial pattern of visual motion with a focus of expansion (FOE) that indicates your heading direction. When self-movement is combined with smooth pursuit eye movements, the turning of the eye distorts the retinal image of the FOE but somehow you still can perceive heading. We studied neurons in the medial superior temporal area (MST) of monkey visual cortex, recording responses to FOE stimuli presented during fixation and smooth pursuit eye movements. Almost all neurons showed significant changes in their FOE selective responses during pursuit eye movements. However, the vector average of all the neuronal responses indicated the direction of the FOE during both fixation and pursuit. Furthermore, the amplitude of the net vector increased with increasing FOE eccentricity. We conclude that neuronal population encoding in MST might contribute to pursuit-tolerant heading perception.

Original languageEnglish (US)
Pages (from-to)596-610
Number of pages15
JournalJournal of neurophysiology
Volume81
Issue number2
DOIs
StatePublished - 1999

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)
  • Physiology

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