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Separate body- and world-referenced representations of visual space in parietal cortex

Author

Listed:
  • Lawrence H. Snyder

    (California Institute of Technology, Pasadena
    Washington University School of Medicine)

  • Kenneth L. Grieve

    (California Institute of Technology, Pasadena
    University of Manchester Institute of Science and Technology)

  • Peter Brotchie

    (California Institute of Technology, Pasadena
    St Vincent's Hospital)

  • Richard A. Andersen

    (California Institute of Technology, Pasadena)

Abstract

In order to direct a movement towards a visual stimulus, visualspatial information must be combined with postural information1. For example, directing gaze (eye plus head) towards a visible target requires the combination of retinal image location with eye and head position to determine the location of the target relative to the body. Similarly, world-referenced postural information is required to determine where something lies in the world. Posterior parietal neurons recorded in monkeys combine visual information with eye and head position2,3,4. A population of such cells could make up a distributed representation of target location in an extraretinal frame of reference4,5,6,7. However, previous studies have not distinguished between world-referenced and body-referenced signals4,8. Here we report that modulations of visual signals (gain fields) in two adjacent cortical fields, LIP and 7a, are referenced to the body and to the world, respectively. This segregation of spatial information is consistent with a streaming of information, with one path carrying body-referenced information for the control of gaze, and the other carrying world-referenced information for navigation and other tasks that require an absolute frame of reference.

Suggested Citation

  • Lawrence H. Snyder & Kenneth L. Grieve & Peter Brotchie & Richard A. Andersen, 1998. "Separate body- and world-referenced representations of visual space in parietal cortex," Nature, Nature, vol. 394(6696), pages 887-891, August.
    • Handle: RePEc:nat:nature:v:394:y:1998:i:6696:d:10.1038_29777
    DOI: 10.1038/29777
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    Cited by:

    1. Janina Klautke & Celia Foster & W. Pieter Medendorp & Tobias Heed, 2023. "Dynamic spatial coding in parietal cortex mediates tactile-motor transformation," Nature Communications, Nature, vol. 14(1), pages 1-18, December.

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