File:Kirkes' handbook of physiology (1907) (14583317078).jpg

Identifier: kirkeshandbookof00kirk (find matches)
Title: Kirkes' handbook of physiology
Year: 1907 (1900s)
Authors: Kirkes, William Senhouse, 1823-1864 Greene, Charles Wilson, 1866-1947
Subjects: Physiology
Publisher: New York, W. Wood and company
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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Fig. 412.—Motor Areas of the Human Brain, Median View. hold good with regard to the human brain. Evidence furnished by diseasedconditions is not wanting to support the general idea of the existence of corticalmotor centers in the human brain, figure 411. So far, however, it has been possible to localize motor functions in theprecentral and ascending parietal convolutions only; the convolutions which 582 THE NERVOUS SYSTEM bound the fissure of Rolando and those on the inner side of the hemisphereswhich correspond thereto, and possibly the frontal lobe in front of the pre-central convolution. The position of the centers is probably much the same as in the monkeysbrain, those for the leg above, those for the arm, face, lips, and tongue fromabove downward. Destruction of these parts causes paralysis, correspondingto the district affected, and irritation causes contractions of the muscles of the CORP. CALIOSUM -ANT? LIMBINTVCAPSULF
Text Appearing After Image:
corp:gen :int. SUP QUADtBODV TEMPORO -PONTINETRACT LOBE. Fig. 413.—Diagram of Certain Connections of the Frontal, Temporal, and Occipital Lobes.Founded on the observations of Flechsig, Ferrier, and Turner. (Cunningham.) same part. Again, a number of cases are on record in which aphasia, or theloss of power of expressing ideas in words, has been associated with disease ofthe posterior part of the lower or third frontal convolution on the left side.This condition is usually associated with paralysis of the right side, righthemiplegia. This district of the brain, particularly the convolutions bounding thefissure of Rolando, is now generally known as the motor area; and there is nodoubt whatever that from this area pass the nerve fibers which proceed to thespinal cord, and are there represented as the pyramidal tracts. MOTOR AREAS OF THE HUMAN BRAIN 583 This is the reason that movements are produced on stimulation of the whitematter after the superficial gray matter of the animals brain

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