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Related Experiment Videos

Gaze effects in the cerebral cortex: reference frames for space coding and action.

D Boussaoud1, F Bremmer

  • 1Institut des Sciences Cognitives, CNRS, 67 Boulevard Pinel, F-69675 Bron Cedex, France, broussaoud@isc.cnrs.fr

Experimental Brain Research
|September 4, 1999
PubMed
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The brain transforms visual information into body-centered coordinates for movement. Recent findings suggest parallel processing of reference frames across the visuomotor pathway, allowing for multiple, task-dependent spatial representations.

Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Motor Control

Background:

  • Visual information is initially mapped retinotopically in the brain.
  • The motor cortex uses a body-centered reference frame for planning movements.
  • The neural mechanisms for transforming visual coordinates to motor coordinates remain unclear.

Purpose of the Study:

  • To review recent findings on coordinate transformation in the visuomotor pathway.
  • To investigate the localization and mechanisms of reference frame transformation in the cerebral cortex.
  • To explore the possibility of parallel emergence of multiple reference frames.

Main Methods:

  • Review of recent neurophysiological and computational studies.
  • Analysis of sensory input signals (retinal and eye position) in the dorsal premotor cortex.

Related Experiment Videos

  • Comparison of eye position effects in premotor cortex and posterior parietal cortex.

    • Main Results:

    • Elementary sensory signals, including retinal and eye position, are present in the dorsal premotor cortex.
    • Similar neuronal properties and inputs suggest a non-retinocentric spatial representation along the visuomotor pathway.
    • Evidence supports the distribution of sensory inputs across the visuomotor continuum.

    Conclusions:

    • The brain may utilize parallel processing to generate multiple, task-dependent reference frames.
    • Sensory input signals distributed across the visuomotor pathway could enable flexible spatial representations.
    • Coordinate transformation may not be a strictly serial process but can occur in parallel.