THE CORPUS STRIATUM 6 1 



Plate XXXII. shows the second or smaller variety of cells found in the corpus striatum. 

 These may be stellate cells quite like those of the thalamus, of which one is shown in the 

 plate ; or they may be very small triangular cells, with protoplasmic prolongations coming off 

 at right angles, or at acute angles to each other. Several such small cells are shown in 

 the plate. The majority of the dendrites of these small cells run in an antero-posterior 

 direction ; hence in the section shown, which is a frontal section, they are cut off, and 

 cannot be traced far. They have few branches, and are not long. The neuraxons of these 

 cells come off in all directions, and cannot be followed. It has been asserted by Marchi 

 that cells of both the types of Golgi are present in the corpora striata. It is evident in 

 both plates that a fine plexus of neuraxons is present throughout the gray matter, and 

 numerous collaterals can be seen coming off from these fibres. 



No definite relation between the corpus striatum and the cortex has been demonstrated, 

 though Kovalewski l believes that fibres enter the outer surface of the putamen from the 

 corona radiata, and external capsule, and end there, establishing such a relation. 



The function of these ganglia is undetermined. 



1 Sitzb. d. K. Akad. d. Wissensch. im Wien, Bd. LXXXVI. iii. Abt., December, 1882. 



