. Quain's elements of anatomy . he two coa-lesced roof-nuclei are seensome of the fibres of thesinjerior (anterior) decussa-tion, and above these againthe laminffi and furrows of thelingula (L g); whilst belowthe roof-nuclei one or twolaminae and furrows of theinferior vermiform process areincluded in the section. Ccq,superior cerebellar peduncle. The cerebellar pe-duncles are constituted by white fibres which pass out from or intothe white medullary substance of the hemispheres. The superior peduncles (crura ad cerebrum) emerge from the mesial partof the medullary substance of the hemispheres
. Quain's elements of anatomy . he two coa-lesced roof-nuclei are seensome of the fibres of thesinjerior (anterior) decussa-tion, and above these againthe laminffi and furrows of thelingula (L g); whilst belowthe roof-nuclei one or twolaminae and furrows of theinferior vermiform process areincluded in the section. Ccq,superior cerebellar peduncle. The cerebellar pe-duncles are constituted by white fibres which pass out from or intothe white medullary substance of the hemispheres. The superior peduncles (crura ad cerebrum) emerge from the mesial partof the medullary substance of the hemispheres, and run upwards andforwards towards the base of the corpora quadrigemina, under whichthey disappear. They are situated at first more at the side, but subse-quently in the roof, of the upper part of the fourth ventricle. Thesepeduncles are concealed by the anterior part of the cerebellum, so thatto see them properly this must be divided in the middle line andturned aside. When this is done the superior crura, with the superior. MINUTE STRUCTUEE. 311 (anterior) medullary velum stretched out between them, are brought toview. The middle peduncles (crura ad pontem) constitute the commissure ofthe cerebellar hemispheres. They emerge from the lateral part of thewhite substance of the hemisphere, and pass forwards to become thetransverse fibres of the ventral half of the pons. The inferior pedundes (crura ad meduUam) issue from the whitematter of the lateral hemispheres, between the other two, and passforwards immediately outside the superior peduncles to reach the lateralwall of the fourth ventricle. Here they turn sharply downwards, at aright angle, and become the restiform bodies of the medulla oblongata. Fig. 282.—FiGiTRE snowisa Fig. 282. THE THREE PAIRS OF CERE-BELLAR PEDUNCLES (fromSappey after Hirschfeld andLeveille). On the left side the tlu-eecerebellar peduncles have beencut short; on the right sidethe hemisphere has been cutobliquely to show its connection■with the su
Size: 1453px × 1719px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectanatomy, booksubjecthumananatomy
