THE SUBTHALAMIC REGION, ETC. 



123 



matter the nucleus, posterior medialis, and latcralis of the oculo- 

 motor ; to it are added fibres from the deep marrow and from 

 the fasciculus longitudinalis posterior ; external to and continu- 

 ous with the latter the fibres of the posterior commissure. Ex- 



FIG. 72. 



Section just back of the anterior quartrigeminal body, combined from specimens at 

 different stages of medullary development. Hcematoxylin staining. 



A it* f'f>rjnt* xtriaf.. From the corpus striatum. 

 Ann L'il>. temporal timl parietulia. From the 



temporal and parietal lobes. 

 AUK Lub. front., From the frontal lobe. 



AUK Tlinlnmus, From the thalamus. 



Cen/r. IK/ilviHjrau, Central (ventricular) gray 



matter. 

 Tif/es Hark, Deep marrow. 



ternal to this a medullary tract, which apparently extends hither 

 from the thalamus, from which it took its departure in the form 

 of the laminae medullares. The fillet from the corpora quad- 

 rigcmina, and that from the tegmental radiation ; internal to 



