THE MUSCLE OF THE SCALP 



379 



which covers the whole of one side of the vertex of the skull, from the occipital 

 bone to the eyebrow. It consists of two parts, the Occipitalis and the Frontalis, 

 connected by an intervening tendinous aponeurosis, the galea aponeurotica. 



The Occipitalis, thin and quadrilateral in form, arises by tendinous fibers from 

 the lateral two-thirds of the superior nuchal line of the occipital bone, and from 

 the mastoid part of the temporal. It ends in the galea aponeurotica. 



Corrugalor 



Dilatator naris ant. 



Dilatator naris post 



Xasalis 



Depressor septi 



Mentalis 



Fio. 378. Muscles of the head, face, and neck. 



The Frontalis is thin, of a quadrilateral form, and intimately adherent to the 

 superficial fascia. It is broader than the Occipitalis and its fibers are longer and 

 paler in color. It has no bony attachments. Its medial fibers are continuous w r ith 

 those of the Procerus; its immediate fibers blend with the Corrugator and Orbicu- 

 laris oculi; and its lateral fibers are also blended with the latter muscle over 

 the zygomatic process of the frontal bone. From these attachments the fibers 

 are directed upward, and join the galea aponeurotica below the coronal suture. 



