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Robert J. Schwartzman, MD

Arch Neurol. 1972;27(4):340-349.

Abstract
Seven rhesus macaque monkeys were trained to discriminate proprioception, vibration, light touch, and two-point discrimination. They then underwent removal of the classical somatosensory lemniscal cortex, areas SI and SII. There was complete loss of proprioceptive and two-point discriminatory ability immediately following surgery, with minimal loss of vibratory discrimination and light touch sensitivity. Following extensive retraining, the animals regained all fine discriminatory ability except for a slight increase of proprioception and two-point discrimination thresholds.

Author Affiliations
Bethesda, Md

From the Neuroanatomical Institute, University of Pennsylvania, Philadelphia; and the Laboratory of Perception, National Institutes of Health, Bethesda, Md. Dr. Schwartzman is now with the Jackson Memorial Hospital, Miami, Fla.

Footnotes
Accepted for publication April 26, 1972.

Reprint requests to Department of Neurology, Suite 448, Woodard Building, Jackson Memorial Hospital, 1700 NW Tenth Ave, Miami, Fla 33136 (Dr. Schwartzman).

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