THE LATERAL VENTRICLES. 



291 



sphere. The inner wall is formed by the septum luci- 

 dum, which is the vertical, partition between the right 

 and left lateral ventricles. The anterior cornu is an 

 extension of the lateral ventricle into the anterior lobe. 



FIG. 127. TRANSVERSE SECTION OF THE HUMAN BRAIN THROUGH 

 THE BASAL GANGLIA. 



NC, caudate nucleus : NC', the amygdala : LN. lenticular nucleus : TH, optic 

 thalamus: F. frontal lobe: TS. temporo-sphenoidal lohe: O. occipital lobe; Cls, elaus- 

 trnm ; IK, thalmo-lenticular portion of internal capsule : K, knee of same ; IK', cando- 

 lenticular portion of same : EK. external capsule : f. fornix cut across : In. insula, or 

 island of Reil : Op, depth of Sylvian fissure : me, middle commissure ; ph, posterior horn 

 of lateral ventricle ; ah, anterior horn of same ; SI, septum luciduin. 



The middle cornu curves downward behind and beneath 

 the optic thalamus into the middle lobe. The posterior 

 cornu extends backward into the posterior lobe. 



The corpus striatum, one of the great basal ganglia, is 

 striated on section, and consists of a mixture of white and 



