Chapter

Conclusion: Contributions of Inhibitory Mechanisms to Perceptual Completion and Cortical Reorganization

Liisa A. Tremere, Raphael Pinaud and Peter De Weerd

in Filling-In

Published in print April 2003 | ISBN: 9780195140132
Published online May 2009 | e-ISBN: 9780199865307 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195140132.003.0015
 Conclusion: Contributions of Inhibitory Mechanisms to Perceptual Completion and Cortical Reorganization

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This concluding chapter begins with a review of the identified contributions of inhibitory mechanisms to normal receptive field (RF) properties. In then discusses contributions of neural interpolation to normal perception. Specifically, a link is proposed between the short-term effects of disinhibition on neural interpolation and perceptual completion phenomena. Sustained disinhibition following deafferentation is proposed to promote slow patterns of neural interpolation, leading to long-term cortical reorganizations that, once completed, can modify the way in which stimuli are perceptually completed. A similar interplay between inhibitory mechanisms and interpolation may be triggered during skill learning. It is proposed that attention can trigger a state of disinhibition resulting in the promotion of plastic changes in cortex that can lay down a memory for the practiced skill. The interplay between inhibition and cortical interpolation, operating at different time scales, provides a common basis for understanding disparate aspects of perception, skill learning, attention, and recovery from injury.

Keywords: receptive field; perception; disinhibition; deafferentation; neural interpolation; cortical reorganization

Chapter.  12774 words.  Illustrated.

Subjects: Neuroscience

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