Diseases of the nervous system / edited by Archibald Church.

Date:
1908
Catalogue details

Licence: In copyright

Credit: Diseases of the nervous system / edited by Archibald Church. Source: Wellcome Collection.

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    brought into play in motor speech function, the destruction of which, there- fore, produces the well known picture of motor aphasia with its various modi- fications. We cannot here discuss the enormous extension of the localization of speech disturbances in the teachings of the last few years. In the physio- logic localization of the centers for smell and taste, nothing decisive has been revealed. Comparative anatomical researches, it is true, point to the region of the gyrus hippocampi, the gyrus fornicatus, the fascia dentata, and, above all, to the cornu ammonis as the center for the sense of smell, since these portions of the brain are highly developed if the bulbus olfactorius is promi- nent, and in the dolphin in which the lobe of smell is absent they are greatly decreased; therefore these areas of the brain together with the lobus olfactorius are known as the rhinencephalon. Nevertheless, the study of cerebral localization is far from being exhausted; on the contrary, it still promises rich results; definite lobes of the brain and Anus and Vagina Fig. 8.—Left Cerebral, Cortex of a Female Chimpanzee (Troglodytes nigcr), showing the results of electric irritation. (After Grünbaum and Sherrington.) definite convolutions included within them are the centers which control special functions, hence it follows that this division of the cerebral cortex into fossae and convolutions is physiologically important. While, however, in the human brain at least, some centers have been recognized, there remain large areas of the cortex of the brain which at present permit no recognition of the localization of definite cerebral functions, and Flechsig has attempted,
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