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Related Experiment Videos

Coordinate transformations for eye and arm movements in the brain.

L H Snyder1

  • 1McDonnell Center for Higher Brain Function, Department of Anatomy & Neurobiology, Box 8108, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, MO 63110, USA. larry@eye-hand.wustl.edu

Current Opinion in Neurobiology
|March 10, 2001
PubMed
Summary

The brain uses eye-centered representations for spatial coding, adapting to eye movements to maintain working memory. New findings reveal how these representations transform sensory input into motor commands.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Computational Neuroscience

Background:

  • Spatial information processing in the brain is crucial for sensory-to-motor transformations.
  • Eye-centered (retinal) representations modulated by eye position, known as gain fields, are prevalent in parietal and occipital cortex.
  • Maintaining spatial working memory during eye movements presents a significant challenge for neural systems.

Purpose of the Study:

  • To investigate the neural mechanisms underlying spatial coding and sensory-to-motor transformations.
  • To explore how the brain overcomes challenges in spatial working memory due to eye movements.
  • To understand the role of eye-centered representations in motor planning.

Main Methods:

  • Analysis of neural activity in parietal and occipital cortex.

Related Experiment Videos

  • Investigating gain field representations and their modulation by eye position.
  • Examining neural representations of spatial locations and arm movements.

    • Main Results:

    • Gain field representations are common in posterior brain regions, encoding eye-centered spatial information.
    • Emerging evidence suggests mechanisms for maintaining spatial memory despite eye movements.
    • Discovery of eye-centered representations for ongoing or intended arm movements.

    Conclusions:

    • The brain employs sophisticated strategies, including gain fields, for spatial coding and sensory-to-motor transformations.
    • Understanding these mechanisms is key to deciphering how the brain manages spatial working memory.
    • The findings reshape our understanding of the sequence of operations in sensorimotor coordinate transformations.