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Pursuit Speed Compensation in Cortical Area MSTd KRISHNA V. SHENOY, JAMES A. CROWELL, AND RICHARD A. ANDERSEN
 

Summary: Pursuit Speed Compensation in Cortical Area MSTd
KRISHNA V. SHENOY, JAMES A. CROWELL, AND RICHARD A. ANDERSEN
Division of Biology, California Institute of Technology, Pasadena, California 91125
Received 4 January 2001; accepted in final form 8 July 2002
Shenoy, Krishna V., James A. Crowell, and Richard A. Andersen.
Pursuit speed compensation in cortical area MSTd. J Neurophysiol 88:
26302647, 2002; 10.1152/jn.00002.2001. When we move forward
the visual images on our retinas expand. Humans rely on the focus, or
center, of this expansion to estimate their direction of self-motion or
heading and, as long as the eyes are still, the retinal focus corresponds
to the heading. However, smooth pursuit eye movements add visual
motion to the expanding retinal image and displace the focus of
expansion. In spite of this, humans accurately judge their heading
during pursuit eye movements even though the retinal focus no longer
corresponds to the heading. Recent studies in macaque suggest that
correction for pursuit may occur in the dorsal aspect of the medial
superior temporal area (MSTd); neurons in this area are tuned to the
retinal position of the focus and they modify their tuning to partially
compensate for the focus shift caused by pursuit. However, the
question remains whether these neurons shift focus tuning more at

  

Source: Andersen, Richard - Division of Biology, California Institute of Technology
Shenoy, Krishna V. - Neurosciences Program & Department of Electrical Engineering, Stanford University

 

Collections: Biology and Medicine; Engineering