Light: Evidence for Its Direct Effect on Hypothalamic Neurons

Journal/Book: Reprinted from Science October 9 1964 Vol. 146 No. 3641 pages 272-273. 1964;

Abstract: Department of Biology Princeton University Princeton New Jersey Abstract. Continuous light impinging an the suprachiasmatic region of enucleate rats resulted in a constant estrous-like vaginal cycle. The lowest precentage of cornified cells was obtained from exposure of the arcuate or mammillary neurons to light. Ovarian and pituitary weight increased significantly after exposure of the arcuate region to continuous light. ___MH

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