. Quain's elements of anatomy . mediately 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 superior and inferiorpeduncles. 1, median groove of thefourth ventricle ; 2, the samegroove at
. Quain's elements of anatomy . mediately 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 superior and inferiorpeduncles. 1, median groove of thefourth ventricle ; 2, the samegroove at the place where theauditory strice emerge from itto cross the floor of theventricle; 8, inferior peduncleor restiform body ; 4, funi-culus gracilis ; 5, superiorpeduncle ; on the right sidethe dissection shows thesuperior and inferior pedunclescrossing each other as theypass into the white centre of the cerebellum ; 6, fillet at the side of the crura cerebri;7, lateral grooves of the crura cerebri; 8, corpora MINUTE SOJRTJCTURE OF THE CEREBELLUM. The cortical grey substance is composed of two distinct layers,viz. :—an outer clear grey layer, and an inner greyish-red granulelayer. At the junction of the two is an incomplete layer of large cells,termed the corpuscles of Purldnje. Outside all is the pia mater, fiomwhich vascular processes extend inwards into the nervous substance. The outer layer (fig. 283, V) consists of a delicate matrix, apparently ofthe nature of neuroglia, containing cells and fibres. Most of the fibreshave a direction at right angles to the surface; the greater number of themare the processes of the large nerve-cells which lie between the two are fine tapering fibres, analogous to the sustentacular fibres ofthe retina, and abutting by a broad base against the inner surface of thepia-mater. The cells of this outer layer are granule-like bodies, some verysmall, and belonging probably to the matrix, others somewhat larger and
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Keywords: ., boo, bookcentury1800, booksubjectanatomy, booksubjecthumananatomy
