Nervous and mental diseases . 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. Relations of body to cortical areas. encounter finger, itrist, elboic, and shoulder movements ; then those of thetrunk, and highest of all those of the lower extremity, which lap over themesial margin of the hemisphere. 170 DISEASES OF THE BRAIN PROPER. In front of the ce
Nervous and mental diseases . 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. Relations of body to cortical areas. encounter finger, itrist, elboic, and shoulder movements ; then those of thetrunk, and highest of all those of the lower extremity, which lap over themesial margin of the hemisphere. 170 DISEASES OF THE BRAIN PROPER. In front of the centers for the tongue and mouth parts, in Brocasconvolution, the third left frontal, motor vocal speech^ is principally rep-resented. In left-handed individuals this motor function is located onthe right side of the brain. If we take the Rolandic area, from the superior margin of the half-brain to the Sylvian fissure, and divide it into fifths by horizontal parallellines, the face occupies the lowest two-fifths, the upper extremity thenext two-fifths, and the trunk and lower extremity the highest and re-maining fifth. Sensory Cortical Localization.—The impossibility of accurately de-termining sensory disturbances in animals is one of the major reasons for theconfusion that exists regarding the cortical representation
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Keywords: ., bookcentury1900, booksubjectmentalillness, booksubjectnervoussys
