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Receptive field structure in the visual cortex: does selective stimulation induce plasticity?

G C DeAngelis1, A Anzai, I Ohzawa

  • 1Group in Vision Science, School of Optometry, University of California, Berkeley 94720-2020, USA.

Proceedings of the National Academy of Sciences of the United States of America
|October 10, 1995
PubMed
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Short-term sensory plasticity in the adult visual cortex does not alter receptive field structure. Instead, some neurons show increased responsiveness, suggesting adaptability through altered neural activity, not structural changes.

Area of Science:

  • Neuroscience
  • Visual Cortex Plasticity

Background:

  • Adult cerebral cortex sensory areas exhibit long-term plasticity.
  • This plasticity is vital for injury recovery and learning.
  • The role of short-term stimulus variations in primary cortical areas is unclear.

Purpose of the Study:

  • Investigate short-term plasticity in primary visual cortex.
  • Determine if receptive field structure changes with recent sensory history.
  • Clarify mechanisms of short-term adaptability in mature visual cortex.

Main Methods:

  • Studied neurons in the mature primary visual cortex.
  • Applied several minutes of surround stimulation.
  • Monitored receptive field size, structure, and responsiveness.

Related Experiment Videos

Main Results:

  • Surround stimulation did not alter receptive field size or internal structure.
  • Some neurons exhibited increased overall responsiveness.
  • No evidence for dynamic alterations in receptive field structure was found.

Conclusions:

  • Dynamic receptive field structure changes do not explain short-term plasticity in the mature primary visual cortex.
  • Short-term adaptability may involve changes in neuronal responsiveness.
  • Receptive fields in mature visual cortex are less malleable than previously suggested.