Sarah L. Levin

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A study was made of changes induced by cholinergic agonists and antagonists in the K+, Na+, Ca2+ and Cl- content of saliva of 22 human subjects with denervated parotid salivary glands. At all stages after denervation there was an increased content of Na+ and Cl- in the secretion of the denervated gland as compared with that of the control glands: after(More)
  • S L Levin
  • 1984
In 110 subjects with traumatic severance of secretory nerves, salivation was studied to determine the effect of denervation on gland function. A sequence of responses was found in which an initial hyperpositive response to cholinergic agents was blocked by atropine (stage I); this effect was reversed and increased salivation occurred in both latent (stage(More)
  • S L Levin
  • 1986
Dualism in the effects of atropine, and metixene upon the denervated human parotid salivary gland is demonstrated by the fact that they suppress pilocarpine secretion while themselves causing an extremely intense and prolonged salivation. A still stronger cholinolytic, chlorosyle, although causing salivation, blocks paradoxical salivation initiated by(More)
The first South African report of chorionic villus sampling for molecular diagnosis of beta-thalassaemia in a 10-weeks' pregnant Indian Muslim woman is presented. The sampling procedure and molecular techniques for sexing the fetus and establishing whether it was affected by beta-thalassaemia are described. From the sample of villi obtained a male fetus was(More)
Sex differences in spatial cognition are well documented; males typically outperform females on tasks dealing with mental rotation and spatial navigation, while females tend to outperform males on tasks dealing with object location, relational object location memory, or spatial working memory. Here we investigated both behavioral and neural sex differences(More)