. Anatomy in a nutshell : a treatise on human anatomy in its relation to osteopathy. Human anatomy; Osteopathic medicine; Osteopathic Medicine; Anatomy. ANATOMY IX A NUTSHELL. 363 anterior surface is convex from side to side and slightly convex from above downward. Its superior border is longer than the lower border and Is convex, while the lower border Is almost straight. In the median line on the anterior surface there is a groove for the basilar artery. Its posterior surface is concave and forms the upper part of the floor of the fourth ventricle. A coronal section will divide it into an an
. Anatomy in a nutshell : a treatise on human anatomy in its relation to osteopathy. Human anatomy; Osteopathic medicine; Osteopathic Medicine; Anatomy. ANATOMY IX A NUTSHELL. 363 anterior surface is convex from side to side and slightly convex from above downward. Its superior border is longer than the lower border and Is convex, while the lower border Is almost straight. In the median line on the anterior surface there is a groove for the basilar artery. Its posterior surface is concave and forms the upper part of the floor of the fourth ventricle. A coronal section will divide it into an anterior or inferior portion and a posterior or superior portion. The posterior part is called tegmentum. The anterior part consists of three main divisions (1) superficial transverse fibres which pass from the middle peduncles of the cerebrum and give the pons its name., (2) deep transverse fibres which decussate in the pons connecting one side of the cerebellum with the opposite side of the cerebrum. (3)is longitudinal fibres which intermingle with the deep transverse fibres and pass through the medulla into PLATE Location of Centers of the Brain. the crust a or pes of the crus. The tegmental portion of the pons, or posteior part, has four main parts. Anteriorly (1) the fillet. (2) formatio reticularis, (3) posterior longitudinal bundle-, and (4) superior olivary nucleus. A hemorrhage in the pons, if it is above the decussation of the seventh nerve will cause paralysis of the opposite side of the face and opposite side of the body but if it is below the decussation of the seventh nerve it will cause paralysis of the same side of the face and opposite side of the body, producing what is known as crossed hemisphlegia. The sixth nerve, seventh nerve, and par' of the eighth nerve have their deep origin in this part of the pons. The crus cerebri or the peduncles of the cerebrum pass upward and outward from the upper margin of the pons into the substance of the cerebrum. Th
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