File:A text-book of human physiology (1906) (14768161384).jpg

Identifier: textbookofhumanp00tige (find matches)
Title: A text-book of human physiology
Year: 1906 (1900s)
Authors: Tigerstedt, Robert, 1853-1923 Murlin, John R. (John Raymond), b. 1874, tr
Subjects: Physiology
Publisher: New York and London, D. Appleton and Co.
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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calization in individual lobes of the cerebellum. Thus Thomas observes thatdestruction of the vermis disturbs more especially the movements of the poste-rior extremities; and, according to v. Rynberk, destruction of the middl(> halfof the vermis affects the neck muscles, while sharply circumscribed destructionof that part of the hemisphere just lateral to this middle region affects themovements of the anterior extremity (dog). Impulses are conveyed to the cerebellum by many different pathways (Fig.271). We shall consider first of all those which connect with the vestibularnerve and those traversing the lateral cerebellar tract of the cord (cf. Fig. 26-4 610 PHYSIOLOGY OF THE BRAIN-STEM and page 593), because the anatomical relationships mark them as of specialimportance, and because we have such evidence also from physiologicalexperiments. As Stefani especially has pointed out, the symptoms following ablation ofthe cerebellum present in many respects a striking agreement with those
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^^ Fig. 271.—Diagram showing paths connecting the cerebellum and pons with the cerebrum, afterBarker. /, fibers of frontal cerebro-cortico-pontal path derived from pyramidal cells in thecortex of the frontal lobe. 1, Frontal cerebro-cortico-pontal path forming a medial bundle ofwhite fibers on the ventral side of the superior peduncle; 2, bundle of fibers connecting thetemporal or temporal and occipital lobes with the cerebellum; 3, cell body in the pons givingoff a fiber to terminate in the opposite cerebellar hemisphere; 4, cell body connected with thetemporal cerebro-cortico-pontal path giving off a fiber to the opposite hemisphere of thecerebellum; 5 and 6, Purkinje cells in the cerebellar cortex giving off fibers to the nucleipontis; 7 and 8, cell bodies in the nuclei pontis sending fibers toward the cerebrum. THE CEREBELLUM 611 which follow extirpation of the membranous lab)Tinth of the internal ear(cf. page 4TG). and the inference seems not too far drawn that the businessof t

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