HEAD AND NECK OF THE HORSE 



201 



the genu (genu capsiil* interna^). The limb in front of the genu may 

 be named the frontal part (pars frontalis capsule internee), and the 

 limb behind the genu the occipital part of the capsule (pars occipitalis 



capsul* internee). 



The internal capsule is of great importance since it contains fibres 

 derived from or passing to various parts of the cerebral cortex. The 



Caudate nucleus. 



Stria medullaris., 



Thalamus. 



Lateral geniculate body. 



Medial geniculate body. 



Corpora quadrigemina. 



Anterior medullary velum. 

 Brachium pontis. 



Brachium conjunctivum. 



Fourth ventricle, 



Lateral recess 

 Restiform body 



Dorsal median fissure. 



.Corpus callosum. 

 Septum pellucidum. 

 Fornix. 



-Stria terminalis. 

 .Third ventricle. 



.Taenia thalami. 

 Pineal body. 



IV. 



y. 



vn. 



VIIL 



..IX. 



-x. 



_XI. 

 .Taenia. 



_ Tuberculum cinereum. 

 _.Fasciculus cuneatus. 



Fig. 96.- Dorsal aspect of the hind- and mid-brain and thalami. The cerel.ellum 

 has been removed. The Roman numerals refer to cerebral nerves. 



divergence of the fibres dorsal to the capsule forms the corona 

 radiata^: below the capsule the fibres are continued into the basis 

 pedunculi. 



The so-called external capsule (capsula externa) is the layer of 

 white matter between the lentiform nucleus and the claustrum. 



Dissection.— li this has not already been done, the pia-arachnoid must 

 be removed from the surface of the hind-brain. The membrane must not 

 be disturbed where it lies between the medulla oblongata and the cere- 



1 Corona [L.], a crown. Radlatus [L.], irradiated, furnished with rays, like a 

 wheel with spokes. 



