528 TEXT-BOOK OF PHYSIOLOGY. 



lenticular capsule or in its abbreviated form as the external capsule. At a 

 given level the internal capsule may be said to consist of two segments or 

 limbs, an anterior, situated between the caudate nucleus and the anterior 

 extremity of the lenticular nucleus, and a posterior, situated between the 



FIG. 244. HORIZONTAL SECTION THROUGH THE CEREBRUM SHOWING THE NATURAL RELATIONS 



OF THE VARIOUS STRUCTURES. 



optic thalamus and the posterior extremity of the lenticular nucleus. The 

 two segments unite at an obtuse angle, termed the knee, which is directed 

 toward the median line. The appearance which is presented at different 

 levels varies however considerably. 



