Skull and Hyoid 



199 



The frontal plate, on its front surface, is smooth and convex, covered by the anterior 

 part of the Occipito-frontalis sheet and, above the orbital margins, by the Orbicularis 

 palpebrarum on each side. The supraorbital vessels and nerves run up to the scalp 



k \~ **'& 



naul p '* i 



jf/ne 



Ethmoid*! notch . fa U m o/d . 



fontmen 



'& '.'.'" " '' ; '; ; '': ; ' ''' -.'"i 



FIG. 165. Frontal bone. Upper figure, from above and behind. Lower 

 figure, from the front : A., surface (below interrupted line) covered by 

 Orbicularis palp. ; B., surface covered by Occipito-frontalis. 



deep to the last-named muscle, and the bone frequently shows grooves marked on it 

 by filaments of the nerve. 



The surface is bounded above by the line of the coronal suture and below by the 

 orbital margins : between these it is prolonged down for a little distance as a nasal 

 surface, on which are two rough articular areas on each side, the inner for the corre- 

 sponding nasal bone and the outer for the nasal process of the maxilla. This surface 

 ends below and centrally in the nasal spine. 



