laa 



ANATOMY AND PHYSIOLOGY OF THE HORSE. 



Q. ■V\niat lobes rest on the wings of the sjjhenoid 

 bone? — A. The criu'a cerebri. 



Q. From whence do they arise? — A. From the in- 

 ferior and middle lobes of the cerebrum, and arc con- 

 tinued into an ovoid protuberance above them, named 

 tuber annulare. 



Q. "What is observable between the crura cerebri ? 

 — A. A small hcmisi)herical medullary eminence, 

 called corpus albicantium. 



Q. Where are the tractus optici situated ? — A. They 

 wind obliquely doAvnward around the crura. 



Q. Where do they proceed from ? — A. From the 

 terminations of the thalami. 



Q. What is the situation of the crura cerebelli ? — A- 

 They are located higher up and in a more outward 

 direction than the crura cerebri. 



Q. Describe the crura cerebelU. — A. They are two 

 1 cyUndroid, medullary chords, wliich join the lateral 

 j lobes of the cerebellum to the tuber annulare. 



Q. What does the tuber annulare rest upon ? — A. 

 On the cuneiform process of the posterior occipital 

 bone. 



Q. Where are the forumina) ca;ca situated ? — A. 

 Above and below the tuber. 



Q. What is their appearance ? — A. They are 

 described as little, round depressions, or blind holes. 



