a 



STJPEKFICIAL ANATOMY OF THE HEAD AND NECK. 



process, and finally recedes slightly to meet the end of the frontal margin at the 

 Sylvian notch. 



Relations of the cerebral fissures and convolutions to the cranial wall. The point 

 of division of the Sylvian fissure is situated in the pterion, beneath or very near the 

 spheno-parietal suture towards its posterior end. From this spot the posterior limb 

 of the fissure runs backwards and somewhat upwards, at first following the line of 

 the squamous suture, and then crossing the temporal area of the parietal bone as far 



Fig. 4. SIDE VIEW OF THE SKULL, SHOWING 



WALL. . 



THK RELATIONS OP THE BRAIN TO THE CRANIAL 



(G. D. T.) 



as the inferior temporal line, beyond which its superior terminal branch ascends for 

 a short distance beneath the parietal eminence. In the child the posterior limb of 

 the fissure is distinctly above the line of the squamous suture. The anterior 

 ascending branch of the Sylvian fissure runs from the hinder part of the spheno- 

 parietal suture upwards and somewhat forwards, crossing obliquely the lower end of 

 the coronal suture ; and the horizontal branch is directed forwards in the line of 

 the spheno-parietal suture. The parieto-occipital fissure is placed opposite the 

 lambda, or often rather above that point, especially in young subjects. The fissure 

 of Rolando is wholly beneath the parietal bone, its upper end being from 4 to 5 cm., 



