Volume 1

Quain's elements of anatomy / edited by Edward Albert Schäfer and George Dancer Thane.

Date:
1895-1898
Catalogue details

Licence: Public Domain Mark

Credit: Quain's elements of anatomy / edited by Edward Albert Schäfer and George Dancer Thane. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

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    pillars find a termination in the grey matter of the corpora albicantia, and are not directly continuous, as in dissected preparations they seem to be, with the bundle of YicQ-d'Azyr. The posimor pilars or crura of.ihiS fornix (fig. 94, 13) are the divergmg posterior prolongations of the two flat lateral bands composing the body. At first co.w. caa - sure ; co.m, middle commissnre ; ch, chiasma ; i quadrigemina ; aq, aqueduct. Fig. 93.—Sketch showing the oiiigin and con- NEDTIONS OP THE ANTERIOK PILLAES OF THE I'ORNix. (Schwalbe.) A median section has been made llirougli the third ventricle, and the superficial grey matter re- moved at its anterior and lower part as far as a. th.s, upper part of the thalamus : th.m, its mesial surface : between the two is the medullary stria, leading from the pineal gland and trigonum habenul83, tr.h, to the anterior pillar of the fornix, c.f; f, bundle of Vicq-d'Azyr; cm, corpus mamillare; i.f, fibres of the inferior peduncle of the thalamus diverging in its substance ; co.a, anterior commis- infandibulum ; r.ip, stalk of pineal body ; qu, corpora they adhere to the under surface of the corpus callosum, then, curving outwards and downwards over the pulvinar of the optic thalamus, each crus enters the descending horn of the lateral ventricle, where some of its fibres are distributed on the surface of Fig. 94.—View of the upper siii- FACE OF THE VELUM INTERPOSITUM, CHOROID PLEXUSES, AND CORPORA STRIATA. (From Sappey after Vicq- d'Azyr. ) I 1, fore part of the tela cboroidea or velum interpositum ; 2, 2, choroid plexus ; 3, 3, left vein of Galen partly covered by the right ; 4, anterior pillars of the fornix divided in front of the foramen of Monro ; on either side are seen small veins from the front of the corpus callosum and the septum lucidum ; 5, vein of tbe corpus striatum ; 6, convoluted marginal vein of the choroid plexus ; 7, vein rising from the thalamus opti- cus and corpus striatum ; 8, vein proceeding from the inferior comu and hippocampus major ; 9, one from the posterior comu ; 11, fornix divided near its midtlle and turned backwards; 12, lyra ; 13, posterior pillar of the fornix ; 14, the splenium of the corpus callosum. the great hippocampus and the remainder are prolonged as the narrow band of white matter known as the tmiii hippocampi or Jimlria (fig- 89, ./?r^' On examining the under surface of the conjoined posterior parts of the fornix and corpus callosum, the splenium of the latter with its thickened edge and the diverging halves of the fornix appear to enclose between them a triangular structure, marked with trans- verse, longitudinal, and oblique lines. To this part the term lyra has been apphed