Summated evoked cortical activity in homonymous visual field defects.
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Biomedical subjects
Publications and source records attributed to R Cohn.
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Dorsal rhizotomy from C(2) or C(3) to T(4) in the primate results in failure to elicit summated cortical responses from systematic stimulation of the appropriate peripheral nerves. Under these conditions there is thus no evidence of sensory input into the cerebral cortex. A nonclassical mechanism must therefore be operational to explain the extensive purposive movements observed in the deafferented animals.
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The increasing use of endotracheal intubation in support of various surgical methods has resulted in more injury to the tracheal mucous membrane than was formerly supposed. Tracheal injury may result in fibrosis and narrowing of the trachea. When tracheal stenosis is of a sufficient degree to necessitate repeated bronchoscopies and dilations, the patient's time under medical care and total morbidity may be considerably lessened by aggressive approach, involving resection of the diseased portion of the trachea.
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