Reach Plans in Eye-Centered Coordinates

The neural events associated with visually guided reaching begin with an image on the retina and end with impulses to the muscles. In between, a reaching plan is formed. This plan could be in the coordinates of the arm, specifying the direction and amplitude of the movement, or it could be in the co...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1999-07, Vol.285 (5425), p.257-260
Main Authors: Batista, Aaron P., Buneo, Christopher A., Snyder, Lawrence H., Andersen, Richard A.
Format: Article
Language:English
Subjects:
Analysis
Anatomical correlates of behavior
Animals
Arm - physiology
Behavioral psychophysiology
Biological and medical sciences
Brain
Brain research
Coding
Coordinate systems
Correlation
Eye Movements
Eyes
Eyes & eyesight
Feedback (Response)
Fixation, Ocular
Fundamental and applied biological sciences. Psychology
Geodetic position
Histograms
Light emitting diodes
Macaca mulatta
Motor ability
Motor Activity
Motor Cortex - physiology
Nervous system
Neural Pathways - physiology
Neurons
Neurons - physiology
Neurons, Afferent - physiology
Neuroscience
Parietal Lobe - physiology
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Psychomotor Performance
Retina
Saccades
Visual cortex
Visual fixation
Visual Pathways - physiology
Visual Perception - physiology
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Description
Summary:The neural events associated with visually guided reaching begin with an image on the retina and end with impulses to the muscles. In between, a reaching plan is formed. This plan could be in the coordinates of the arm, specifying the direction and amplitude of the movement, or it could be in the coordinates of the eye because visual information is initially gathered in this reference frame. In a reach-planning area of the posterior parietal cortex, neural activity was found to be more consistent with an eye-centered than an arm-centered coding of reach targets. Coding of arm movements in an eye-centered reference frame is advantageous because obstacles that affect planning as well as errors in reaching are registered in this reference frame. Also, eye movements are planned in eye coordinates, and the use of similar coordinates for reaching may facilitate hand-eye coordination.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.285.5425.257