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The premotor cortex and nonstandard sensorimotor mapping

S P Wise1, G di Pellegrino, D Boussaoud

  • 1Laboratory of Neurophysiology, National Institute of Mental Health, Poolesville, MD 20837, USA.

Canadian Journal of Physiology and Pharmacology
|April 1, 1996
PubMed
Summary
This summary is machine-generated.

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The brain can flexibly shift gaze, attention, and reaching movements, a process called nonstandard mapping. This flexibility, crucial for complex behaviors, may be supported by the premotor cortex.

Area of Science:

  • Neuroscience
  • Motor Control
  • Cognitive Science

Background:

  • Sensorimotor transformations typically align gaze, attention, and reaching with visual targets (standard mapping).
  • However, the brain can decouple these actions, allowing for flexible behavioral responses.

Purpose of the Study:

  • To explore the concept of nonstandard mapping, where sensorimotor transformations deviate from standard spatial congruency.
  • To investigate the potential role of the premotor cortex in enabling nonstandard mapping and behavioral flexibility.

Main Methods:

  • The study reviews existing literature and theoretical frameworks concerning sensorimotor control and spatial cognition.
  • It analyzes scenarios demonstrating dissociations between gaze, attention, and reaching.

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Main Results:

  • Standard mapping ensures congruent guidance of eyes, limbs, and body toward visual targets.
  • Nonstandard mapping allows for dissociation between attention, gaze, and reaching targets.
  • Conditional motor tasks illustrate guiding actions with nonspatial cues.

Conclusions:

  • Nonstandard mapping is essential for behavioral flexibility, enabling the brain to adapt to complex and dynamic environments.
  • The premotor cortex is hypothesized to be a key neural substrate underlying nonstandard mapping.