Translation speed compensation in the dorsal aspect of the medial superior temporal area

Brian Lee, Bijan Pesaran, Richard A. Andersen

Research output: Contribution to journalArticle

Abstract

The dorsal aspect of the medial superior temporal area (MSTd) is involved in the computation of heading direction from the focus of expansion (FOE) of the visual image. Our laboratory previously found that MSTd neurons adjust their focus tuning curves to compensate for shifts in the FOE produced by eye rotation (Bradley et al., 1996) as well as for changes in pursuit speed (Shenoy et al., 2002). The translation speed of an observer also affects the shift of the FOE. To investigate whether MSTd neurons can adjust their focus tuning curves to compensate for varying translation speeds, we recorded extracellular responses from 93 focus-tuned MSTd neurons in two rhesus monkeys (Macaca mulatta) performing pursuit eye movements across displays of varying translation speeds. We found that MSTd neurons had larger shifts in their tuning curves for slow translation speeds and smaller shifts for fast translation speeds. These shifts aligned the focus tuning curves with the true heading direction and not with the retinal position of the FOE. Because the eye was pursuing at the same rate for varying translation speeds, these results indicate that retinal cues related both to translation speed and extraretinal signals from pursuit eye movements are used by MSTd neurons to compute heading direction.

Original languageEnglish (US)
Pages (from-to)2582-2591
Number of pages10
JournalJournal of Neuroscience
Volume27
Issue number10
DOIs
StatePublished - Mar 7 2007

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Neurons
Eye Movements
Macaca mulatta
Cues
Direction compound

Keywords

  • Compensation
  • Heading perception
  • MSTd
  • Optic flow
  • Self-motion
  • Translation

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Translation speed compensation in the dorsal aspect of the medial superior temporal area. / Lee, Brian; Pesaran, Bijan; Andersen, Richard A.

In: Journal of Neuroscience, Vol. 27, No. 10, 07.03.2007, p. 2582-2591.

Research output: Contribution to journalArticle

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