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Biomedical subjects

J Pearce

Publications and source records attributed to J Pearce.

At least 199 records · Page 11Linked to original sources
PubMed1968

Vasopressin in prevention of lumbar puncture headache.

A double-blind controlled trial of aqueous vasopressin injection (Pitressin) in the prophylaxis of lumbar puncture reactions in 50 patients showed that the incidence of reactions was unaffected, but that severe reactions occurred less frequently in the treatment group. Moderately severe side-effects occurred in 27% of those receiving vasopressin.

Clinical Trials as Topic↗
PubMedDate not supplied

Neural factors influence the degeneration of muscle fibers in the chelae of snapping shrimps.

The asymmetric pincer and snapper claws in the snapping shrimp differ in external morphology and musculature. The snapper is a massive claw used for displays and defense; the pincer is small and slender, used for feeding and burrowing. The snapper has only slow muscle fibers; the pincer has both slow and fast. Removal or denervation of the snapper claw induces transformation of the contralateral pincer to a snapper type of claw at the subsequent molt. A removed claw regenerates as a pincer type, as long as the innervation of the remaining claw is intact. Fast muscle fibers, found exclusively in the pincer claw, normally degenerate completely within 10 d after the moult, which transforms the pincer to a snapper. Morphological transformation of the pincer following removal of the snapper claw can occur even if the pincer claw is denervated. Denervation of the pincer, however, delays degeneration of the fast fibers, increasing the estimated half-time of muscle degeneration, for 4.4 +/- 0.2 to 19.5 +/- 0.8. d after the transforming moult. Neural influences therefore are involved both in the determination of the morphology of the claw and in the induction of degenerative changes during the remodeling of an existing claw.

Animals↗