344 



LABORATORY MANUAL OF HUMAN ANATOMY 



exposed; note how it is formed by the pia mater encephali 

 coming in through the fissura transversa cerebri. In connection 

 with it, study 



(a) Upper lamella, next to inferior surface of corpus callosum and fornix. 



(b) Lower lamella, over the surface of the thalamus. 



(c) Between (a) and (b) some loose connective tissue, a continuation of 



the subarachnoideal connective tissue of the cisterna venae 

 cerebri magnae. In this study 



FIG. 156. 



Cq* Cq 



Ccq 



Gcb 



Co 



II' 



Spa 



A portion of the right cerebral hemisphere resting on the polus frontalis, to illustrate the basis cerebri. 

 Sea, brachium quadrigeminum superius ; Bcp, brachium quadrigeminum inferius ; Ccb, pedunculus 

 cerebri ; Cgl, corpus geniculatum laterale ; Cgm, corpus geniculatum mediale ; Ccq, brachium conjunc- 

 tivum ; Co, chiasma opticum ; Cq 1 , colliculus inferior ; Cqi, colliculus superior ; L, lemniscus ; Pv, pul- 

 vinar of thalamus ; Spa, substantia perforata anterior ; St, stria terminalis ; II', tractus opticus. The 

 radix medialis and the radix lateralis are well illustrated ; f, cut surface of tip of temporal lobe which 

 has been removed. (After J. Henle, Handbuch der Nervenlehre des Menschen, II. Aufl., Braunsch.. 

 1879, S. 155, Fig. 80.) 



(ca) The two internal veins of the cerebrum (venae cerebri inter- 

 nae) (0. T. veins of Galen), and their tribu- 

 taries 



(caa) Vein of septum pellucidum (V. septi pellucidi). 



(cab) Terminal vein (V. terminalis) (0. T. vein of the 



corpus striatum). 



(cac) Chorioid vein (V. chorioidea). 



The venae cerebri internae unite to form the 



