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October 1972

Somatesthetic Recovery Following Primary Somatosensory Projection Cortex Ablations

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.

Arch Neurol. 1972;27(4):340-349. doi:10.1001/archneur.1972.00490160068008

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.

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