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Robert Cohn, MD

Arch Neurol. 1969;21(3):321-329.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

PATHOLOGIC lesions of sufficient severity to give rise to homonymous hemianopic defects in man usually show decreased electric activity, particularly of the -frequency waves over the involved cerebral hemisphere.^1,2 The phenomenon of altered electric output is observed in both the spontaneous electroencephalogram and in summated evoked cortical responses.^3-5 Both of these responses in man show striking variability in different individuals; the decreased electric output also appeared to be dependent on the duration of time from injury. It, therefore, seemed important to carry out a series of experiments in the primate visual system in which the location, extent, and durations of the injuries could be precisely controlled. This study addresses itself primarily to the evaluation of the summated visual evoked cortical responses, since the -frequency or other rhythmic output of the monkey is not as well defined, or as well organized, as in man.

Methods

Twelve monkeys (Macacus . . . [Full Text PDF of this Article]

Author Affiliations
Bethesda, Md

From the National Naval Medical Center, Bethesda, Md.

Footnotes
Submitted for publication March 24, 1969; accepted April 23.

Read in part before the 90th annual meeting of the American Neurological Association, Atlantic City, NJ, June 15, 1965.

Reprint requests to the National Naval Medical Center, Bethesda, Md 20014.

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