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Related Experiment Videos

Map plasticity in somatosensory cortex.

Daniel E Feldman1, Michael Brecht

  • 1Division of Biological Sciences, University of California, San Diego, 9500 Gilman Drive, Room 0357, La Jolla, CA 92093, USA. dfeldman@ucsd.edu

Science (New York, N.Y.)
|November 8, 2005
PubMed
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Sensory maps in the brain change with experience. This study shows map plasticity in the somatosensory cortex involves multiple brain areas and mechanisms, not just one.

Area of Science:

  • Neuroscience
  • Cognitive Science

Background:

  • Neocortical sensory maps are plastic and change with experience and learning.
  • Somatosensory cortex exhibits distinct patterns of plasticity in response to sensory use or disuse.

Purpose of the Study:

  • To investigate the mechanisms underlying adaptive sensory map alterations in the neocortex.
  • To explore the distributed nature of plasticity in the somatosensory cortex.

Main Methods:

  • Utilized diverse approaches including genetics, synaptic and in vivo physiology.
  • Employed optical imaging and ultrastructural analysis to study cortical circuits.

Main Results:

  • Evidence suggests a distributed model of plasticity occurring at multiple sites within the cortical circuit.

Related Experiment Videos

  • Multiple cellular and synaptic mechanisms, along with various learning rules, contribute to map plasticity.
  • Findings contrast with the classical model of a single Hebbian process.

    • Conclusions:

    • Sensory map plasticity in the somatosensory cortex is a complex, multi-site phenomenon.
    • The adaptive alteration of sensory maps involves a distributed network rather than a single synaptic mechanism.