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Intentional maps in posterior parietal cortex.

Richard A Andersen1, Christopher A Buneo

  • 1Division of Biology, California Institute of Technology, Mail Code 216-76, Pasadena 91125, USA. andersen@vis.caltech.edu

Annual Review of Neuroscience
|June 8, 2002
PubMed
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The posterior parietal cortex (PPC) integrates sensory information for movement planning. It contains specialized regions for eye, reaching, and grasping intentions, utilizing a common spatial representation.

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience

Background:

  • The posterior parietal cortex (PPC) was traditionally considered a sensory area.
  • Emerging research highlights its crucial role in sensory-motor integration and the formation of movement intentions.

Purpose of the Study:

  • To elucidate the role of the PPC in sensory-motor integration.
  • To investigate the functional organization of intention formation within the PPC.
  • To explore the neural mechanisms underlying sensory-motor transformations in the PPC.

Main Methods:

  • Review of existing literature on PPC function.
  • Analysis of neuroimaging and electrophysiological studies.
  • Examination of computational models of PPC activity.

Main Results:

Related Experiment Videos

  • The PPC is vital for integrating multisensory information to guide motor output.
  • Distinct subregions within the PPC are specialized for planning different types of movements (e.g., eye, reach, grasp).
  • A common, distributed spatial representation, independent of sensory or motor specifics, facilitates these transformations in several PPC subregions.

Conclusions:

  • The PPC acts as a critical hub for translating sensory perceptions into actionable motor intentions.
  • Specialized maps of intentions within the PPC support diverse motor behaviors.
  • The PPC employs abstract spatial representations and is influenced by attention and learning, likely within the framework of sensory-motor processing.