Skull and Hyoid 



203 



The concave inner or cerebral surface has slight depressions corresponding with 

 the convolutions, particularly in its lower part. It otherwise presents : 



(a) Grooves for vessels of the middle meningeal series : usually two main 

 branching grooves, one running up near the front, the other further back. 



(b) A partial groove for superior longitudinal sinus, better marked on the right 





B 



(frontal) 

 iillinf\ 



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^iCiKf.Mfft. 



for Ternponl fio-Jflemiii 



FIG. 167. Right parietal. A ., inner surface ; B., outer surface. 



bone as a rule (see Fig. 167). The margins of the groove afford attachment to the 

 falx cerebri. 



(c) Depressions for Pacchionian bodies. 



(d) A groove on postero-inferior angle, where the lateral sinus reaches the 

 bone from the occipital and at once turns down and passes off it on to the temporal. 



(e) A parietal fossa, corresponding with the deepest part of the concavity of 

 the bone. 



MARGINS. (i) Upper or sagittal, much serrated, but usually rather straighter 

 opposite the foramen ; articulates with the opposite parietal. 



(2) Anterior or coronal, smaller serrations, articulating in its whole length 

 with frontal, which it overlaps below ; but in the upper part the frontal overlaps 



