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A MANUAL OF PHYSIOLOGY 



of the peduncle. The fibres which reach the restiform body from the 

 olivary nucleus of the opposite, and also in smaller numbers from 

 that of the same side, run mainly to the hemisphere. All these 

 fibres are afferent in relation to the cerebellum (cerebello-petal) . An 

 uncrossed afferent^connection also exists between the cerebellum 

 and the vestibular,- branch of the auditory nerve, through certain of 

 its nuclei of reception, and also between it and the nuclei of other 

 cranial nerves, such as the trigeminus and the vagus. The fibres 

 pass up in the inner portion of the inferior peduncle (direct sensory 

 cerebellar path of Edinger, Fig. 329) to the nucleus of the roof 

 (nucleus tecti) and nucleus globosus. Some efferent fibres (cerebello- 

 fugal) also run down from the cerebellum in the inferior peduncle, 

 including fibres from the nucleus tecti of the opposite side which are 

 on their way to the medulla oblongata. 



The middle peduncle is in the main a link between the cerebellar 



FIG. 329. DIRECT SENSORY CERE- FIG. 330. DIAGRAM OF DORSAL AND VENTRAL 



BELLAR PATH OF EDINGER. 



(S~ D, Deiters' nucleus ; v, median 

 nucleus of auditory nerve ; t, nucleus 

 of the roof ; g, nucleus globosus. 



SPINO-CEREBELLAR TRACTS ENTERING CERE- 

 BELLUM (MOTT). 



P.C.Q., posterior corpora quadrigemina ; 

 s.v., superior vermis (worm) of cerebellum ; 

 d.a.c., v.a.c., dorsal and ventral ascending cere- 

 bellar tracts. 



cortex and the cerebral cortex of the opposite side, through the 

 relay of the pontine grey matter. Most of the fibres in it are afferent 

 in relation to the cerebellum, their cells of origin being situated in 

 the nuclei of the pons, and sending their axons across the middle line 

 to end in the cerebellar cortex. 



The superior peduncle connects chiefly the dentate nucleus of one 

 side with the cortex of the opposite cerebral hemisphere through 

 the red nucleus of the tegmentum of the crus cerebri and the 

 optic thalamus on the opposite side. The great majority, or perhaps 

 all, of its fibres are efferent fibres as regards the cerebellum i.e., 

 their cells of origin lie in the dentate nucleus. Running upwards 

 and forwards in the superior peduncle towards the mid-brain they 



