Physiology : A manual for students and practioners / by Theodore C. Guenther and Augustus E. Guenther.

  • Guenther, Theodore C. (Theodore Charles)
Date:
1903
Catalogue details

Licence: Public Domain Mark

Credit: Physiology : A manual for students and practioners / by Theodore C. Guenther and Augustus E. Guenther. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    CENTi:. IL .\7v7.' \'() IS SYSTIJM. 18:J cortical celln, when [he fibres with wliicli tlicy wore in coimection tlogenerate. Jiy tliis inctliod it lias hi't-ii liniiul that the axoiifx of the motor ccll.-< extend throiiirli th(^ IntrDiol ntj)iinh\ throu^rii the criistd, and the pjintmltlH to the Imlh-rord. It is found tliat some iil)rcs of the caUoxnm also (hrjnu-roti', and may he traced down through the internal capsule aud crusta of the other side. Fi(.i. 41. 9 -/ Brain of monkey, showinyrthe position of the motor and sensory centres as ascer- tained l)y Ferrier. Tlie actions all occur on the side of the tmdy opposite to the part of tile bruin irritated : 1, the eyes open widely, the ]iiiiiils dilate, and head and eyes turn toward npimsite side : 2, extension furwiinl <«f the oTijMisite arm and hand, as if to reach something in front: .>, movements of tail (ancl trunk); 4, retraction with adduction of opposite arm ; .^, supination and tlexion of the forearm, by which the arm is raised toward the mouth : I'l, action of zypromatics, by whicli the anf;le of mouth is retracted and elevated: 7, elevatinn of ala of nose and upper lip: 8, openin^r of mouth witli i>rotrusion of tonsrue : ;•, ri'traction of tonpue: lo, retraction of opposite angle of niuuth ; (7, b. r, d, preliensile movenu'nts: 11, retraction and adduction of opposite arm: I.', advance of the opposite hind liml); 13, complex movements of thigh, leg, and foot: 14,15, vision (sensory); IR, hearing (sensory;. At the decussation of the. pjiraniids the irreater ininiher of the fii)res from the internal capsule of each side cross to the opposite side, and when they reach the cord are jTrouped together to form the crossf'<1 piiramidal trart oi' the latrral cohnnnx. A les.<er number of the fibres pa.ss down into the cord on the same side and form the direct j>yramidiil tractx of the a)itcrior columns. Injury to the cortex of one hemisphere will produce degenera-