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Related Experiment Videos

A common reference frame for movement plans in the posterior parietal cortex.

Yale E Cohen1, Richard A Andersen

  • 1Department of Psychological and Brain Sciences, Center for Cognitive Neuroscience, 6207 Moore, Dartmouth College, Hanover, New Hampshire 03755, USA. yec@dartmouth.edu

Nature Reviews. Neuroscience
|July 3, 2002
PubMed
Summary

The posterior parietal cortex transforms sensory information into a common, eye-centered reference frame. This neural computation is crucial for guiding movements by integrating various positional signals.

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Motor Control

Background:

  • Movement control necessitates transforming sensory data across different reference frames.
  • Sensory encoding and motor effector frames often mismatch, requiring neural computation.
  • The posterior parietal cortex is implicated in these critical reference frame transformations.

Purpose of the Study:

  • To investigate how the posterior parietal cortex processes sensory information for movement guidance.
  • To identify the reference frame used by parietal neurons for sensory-to-motor transformations.
  • To understand the role of eye-, head-, body-, and limb-position signals in modulating neural representations.

Main Methods:

  • Neuronal recordings in two posterior parietal cortical areas.

Related Experiment Videos

  • Analysis of neural activity during sensory-guided movement tasks.
  • Characterization of reference frames for sensory representations.

    • Main Results:

    • A significant proportion of parietal neurons transform sensory signals into a common reference frame.
    • This common reference frame is eye-centered.
    • Neural representations are modulated by eye, head, body, and limb position signals.

    Conclusions:

    • The posterior parietal cortex utilizes a common, eye-centered reference frame for sensory-motor transformations.
    • This unified representation may facilitate inter-area communication for coordinating diverse effectors.
    • An eye-centered frame offers an efficient method for representing external sensory targets.