. Manuel de physiologie de Kirkes . LLUM 561 omohyoid à travers sa branche descendante, descendens noni; le thyro-hyoidthrough une branche spéciale; et le genio-hyoid, stylo-glossus, hyo-glossus, et genio-hyo-glossus et linguales à travers ses branches linguales. Fonctions. La fonction de l'hypoglossal est exclusivement moteur. Dans les cas d'hémiplégie impliquant les fonctions du nerf hypoglossal, le tonguewhen dépasse dévie vers le côté paralysé, quand il est retiré, il tourne du côté paralysé. Il arrive parfois qu'il ne soit pas possible d'observer toute déviation dans la direction de la pince saillante

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. Kirkes' handbook of physiology . LLUM 561 omohyoid through its descending branch, descendens noni; the thyro-hyoidthrough a special branch; and the genio-hyoid, stylo-glossus, hyo-glossus, and genio-hyo-glossus and linguales through its lingual branches. Functions. The function of the hypoglossal is exclusively motor. Incases of hemiplegia involving the functions of the hypoglossal nerve the tonguewhen protruded deviates toward the paralyzed side, when withdrawn it turnsaway from the paralyzed side. Occasionally it is not possible to observe anydeviation in the direction of the protruded tongue; probably because thetongue is so compact and firm that the muscles on either side can push itstraight forward or turn it for some distance toward either side. In hypo-glossal paralysis from cerebral lesions or lesions of the peduncles the paralysisis contralateral. IV. THE CEREBELLUM. The cerebellum is a large division of the brain, located just beneath thecerebrum and behind the medulla and pons. It is connected with the rest. Fig. 392.—Cerebellum in Section and Fourth Ventricle, with the Neighboring Parts, r, Median groove of fourth ventricle, ending below in the calamus scriptorius, with the longitudinaleminences formed by the fasciculi teretes, one on each side; 2, the same groove, at the place wherethe white streaks of the auditory nerve emerge from it to cross the floor of the ventricle; 3, in-ferior cms or peduncle of the cerebellum, formed by the restiform body; 4, posterior pyramid;above this is the calamus scriptorius; 5, superior crus of cerebellum, or processus e cerebello adcerebrum (or ad testes); 6, 6, fillet to the side of the crura cerebri; 7, 7, lateral grooves of the cruracerebri; 8, corpora quadrigemina. (From Sappey, after Hirschfeld and Leveille.) of the brain by three peduncles on each side: the superior, the middle, and theinferior peduncle, figure 392. The cerebellum is composed of white and gray matter, the latter being external, as in the cerebru

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