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Biomedical subjects

S C Sharma

Publications and source records attributed to S C Sharma.

At least 379 records · Page 21Linked to original sources
PubMed1972

Redistribution of visual projections in altered optic tecta of adult goldfish.

The retinotectal connections formed in adult goldfish after removal of the rostro-caudal strip of dorsal tectum were mapped electrophysiologically. Initial maps recorded 1 month after surgery revealed visual scotoma corresponding to the ablated tectum. Subsequent maps recorded 4-5 months after the operation showed that the entire visual field redistributed appropriately over the remaining tectum. It is suggested that, in spite of an abnormal optic tectum, the reformed projection demonstrates a tendency to retain its completeness.

Action Potentials↗
PubMed1970

Electrical activity in the spinal cord of the chick embryo, in situ.

Unit electrical activity was recorded from single neurons in the lumbo-sacral spinal cord of 15-, 17-, and 19-day chick embryos, in situ. The dorsal columns showed relatively continuous single-unit activity. Below this lies an area of relative quiet 100-200mu deep. The ventral two thirds of the cord was the most active region, being characterized by polyneuronal bursts and intermittently active single units.

Animals↗
PubMed1970

Unit activity in the isolated spinal cord of chick embryo, in situ.

Unit electrical activity was recorded from single neurons in the isolated lumbo-sacral spinal cord of 14- to 19-day chick embryos, in situ. Spinal cord transection was combined with transection of all lumbo-sacral dorsal roots. The spontaneous discharge of cells is confined, for the most part, to the lower two thirds of the cord. A quasilinear reduction in the number of spontaneously active units was found during the developmental period studied. Comparable results were obtained in decentralized cord with sensory inputs blocked by xylocaine.

Animals↗