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August 1949

EFFECTS OF ULTRAVIOLET RADIATION ON THE EXPOSED BRAIN

Author Affiliations

MONTREAL, CANADA; WASHINGTON, D. C.

From the Department of Neurology and Neurosurgery, McGill University, and the Montreal Neurological Institute.

Arch NeurPsych. 1949;62(2):127-149. doi:10.1001/archneurpsyc.1949.02310140002001
Abstract

GERMICIDAL radiation of the operating field with ultraviolet rays has contributed much to the asepsis of surgery. Its effects on various tissues have been studied.1 Hart and Sanger1a alone reported the effect of ultraviolet radiation on the exposed brain and spinal cord of 2 dogs. They stated that after exposures to wavelengths of approximately 2,537 angstrom units for one hour no injurious effects were found pathologically.

The purpose of this paper is to report the pathologic changes resulting from five hour exposures in 10 brains of cats having bilateral maximal craniotomies. One hemisphere was shielded from the ultraviolet rays for control purposes, while the other hemisphere was irradiated. The exposures were made in the regular operating theaters of the Montreal Neurological Institute. The brain of each cat was studied pathologically between the third and the fifth postoperative day.

THEORETIC CONSIDERATIONS  For all practical purposes, we are concerned with

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