CLINICAL INVESTIGATION OF OLFACTORY FUNCTION IN BRAIN TUMOUR PATIENTS

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Abstract
A known vol. of air containing a definite conc. of coffee or of citral was injected into one nostril, during a period of voluntary apnoea. The number of cc. necessary in order to be identified is the minimum identifiable odor (M.I.O.). In 60 normal individuals 3-15 cc. of the coffee laden air was necessary to elicit the M.I.O. 35 patients with brain tumors required a larger vol. for the M.I.O. The periods of duration of olfactory fatigue were greatly prolonged in cerebral tumor patients on the side of the lesion.

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