File:Nervous and mental diseases (1919) (14758523716).jpg

Identifier: nervousmentaldis00chu (find matches)
Title: Nervous and mental diseases
Year: 1919 (1910s)
Authors: Church, Archibald, b. 1861 Peterson, Frederick, 1859-1938, joint author
Subjects: Nervous system Mental illness
Publisher: Philadelphia, London, W.B. Saunders company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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n was formerly thought. The functional groups of skeletalmuscles are represented in the precentral or ascending frontal convolu-tion from the lower end of Rolandos fissure up to the midline of the brain,and to a slight extent on the mesial surface of the hemisphere, in a con-tinuous narrow zone. The bottom of the fissure of Rolando sharplybounds the motor area behind, and it extends forward not to exceed thewidth of the precentral gyre. Liepman - and Wilson ^ have shown conclusively that the ability toperform skilled movements with the limbs resides in the first and second 1 Histological Studies of the Localization of Cerebral Functions, 1905. 2 Monatsschr. f. Psychiatr. u. IseuroL, 1900, 1906, 1907. 3 Brain, 1908. THE CEREBRAL CORTEX—LOCALIZATION. 169 frontal convolutions of the left side. Their destruction results in a lossof such motions, a condition called apraxia, analogous to or identicalwith motor aphasia and agraphia. This state may be unattended byany evidence of paralysis.
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Fig. 68.—Functional areas of the mesial surface of the left hemisphere (after Campbell). At the branching of the fissure of Sylvius motious of the tongue andplatysma are reprc-sented, and immediately above them tlie muscles ofthe face—first the lower, then the upper, face parts. Next in order we

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