Selective Interference with the Representation of Size in the Human by Direct Cortical Electrical Stimulation

Selective Interference with the Representation of Size in the Human by Direct Cortical Electrical... A specific category in human cognition, size representation, was disrupted by the application of cortical electrical interference through a recently modified technique involving implantation of indwelling subdural electrode arrays. When subjected to electrical stimulation at a specific site, the subject was unable to access size information when questioned verbally, but showed no deficit if the size discrimination was presented visually. Verbal questions about size were answered correctly when the patient was not subjected to cortical interference. Other measures of verbal and visual comprehension for the categories of color, shape, orientation, movement, texture, and structure, tested under cortical interference, were normal. This clear-cut distinction between verbal and visual access to information about size, shown by a reversible block at a known and anatomically circumscribed site, provides further evidence that higher order neural processing is categorically represented. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Cognitive Neuroscience MIT Press

Selective Interference with the Representation of Size in the Human by Direct Cortical Electrical Stimulation

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Publisher
MIT Press
Copyright
© 1992 by the Massachusetts Institute of Technology
ISSN
0898-929X
eISSN
1530-8898
DOI
10.1162/jocn.1992.4.4.337
pmid
23968127
Publisher site
See Article on Publisher Site

Abstract

A specific category in human cognition, size representation, was disrupted by the application of cortical electrical interference through a recently modified technique involving implantation of indwelling subdural electrode arrays. When subjected to electrical stimulation at a specific site, the subject was unable to access size information when questioned verbally, but showed no deficit if the size discrimination was presented visually. Verbal questions about size were answered correctly when the patient was not subjected to cortical interference. Other measures of verbal and visual comprehension for the categories of color, shape, orientation, movement, texture, and structure, tested under cortical interference, were normal. This clear-cut distinction between verbal and visual access to information about size, shown by a reversible block at a known and anatomically circumscribed site, provides further evidence that higher order neural processing is categorically represented.

Journal

Journal of Cognitive NeuroscienceMIT Press

Published: Oct 1, 1992

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