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Related Experiment Videos

Cortical control of reaching movements

J F Kalaska1, S H Scott, P Cisek

  • 1Département de physiologie, Université de Montréal, Québec, Canada. kalaskaj@ere.umontreal.ca

Current Opinion in Neurobiology
|February 18, 1998
PubMed
Summary

Neuronal activity in the parietal cortex represents limb position and target locations, while precentral cortex handles motor action selection and execution. These processes are understood via sensorimotor transformations and internal models.

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Motor Control

Background:

  • The parietal cortex is implicated in spatial processing and sensorimotor integration.
  • The precentral cortex (motor cortex) is known for its role in motor execution.

Purpose of the Study:

  • To differentiate the roles of parietal and precentral cortical activity in motor control.
  • To provide a conceptual framework for understanding sensorimotor transformations.

Main Methods:

  • Analysis of neuronal activity in parietal and precentral cortices during motor tasks.
  • Review and synthesis of recent neuroscientific studies.

Main Results:

  • Parietal cortex neuronal activity reflects spatial representations (limb position, targets).

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  • Precentral cortex neuronal activity is more associated with motor action selection and execution.
  • These findings support distinct functional specializations within sensorimotor pathways.

    • Conclusions:

    • Spatial representation and motor execution involve distinct cortical regions.
    • Sensorimotor transformations and internal models offer a framework for interpreting these distinct neural processes.