A STUDY OF THE CORTICAL OLFACTORY CENTER

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Abstract
It is many years since Broca and Zuckerkandl first claimed that the gyrus hippocampi, cornu ammonis, and gyrus fornicatus were the cortical olfactory centers. Experimental study, clinicopathologic observations, and comparative anatomy have been productive of a large number of papers concerning this important subject. In spite of the efforts of many authors, the exact location of the cortical olfactory center cannot be said to have been definitely determined. Recently I had an opportunity to study two patients presenting unilateral involvement of the olfactory lobe, one of congenital absence, the other of softening due to arteriosclerosis. Both had a lesion in the same area of the homolateral lobus pyriformis, the lesion being reasonably regarded as a secondary degeneration following the primary involvement of the peripheral olfactory center. Report Of Cases Case 1.—Clinical History. —Case No. 22048, Danvers State Hospital; necropsy No. 2165. A man, born in August, 1861, single, whose early

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