THE HEAD, ANTERIOR. 29 



Nerve Supply. The temporofacial division of the sev- 

 enth nerve. 



Action. To close the eyelids. 



The Tarsal Ligaments. 



The internal is a fibrous band less than a quarter of an 

 inch long which is attached internally to the crest of the 

 nasal portion of the superior maxilla and externally gives 

 attachment to the orbicularis palpebrarum muscle, and di- 

 vides into two portions, which are projected into the mar- 

 gins of the tarsal cartilages. 



The external tarsal ligament passes from the outer 

 extremities of the tarsal cartilages to the orbital process of 

 the malar bone. 



Pyramidalis Nasi. 



That portion of the occipitofrontalis which is extended 

 to the nasal bones where they are joined by their cartilages. 



The compressor narium, depressor alae nasi, dilator naris 

 anterior, and dilator naris posterior are muscles of interest 

 to the specialist in the field of anatomy and need not be 

 dissected by the student (there are too many other struc- 

 tures of more importance than insignificant muscles of this 

 sort, that demand his attention). 



DISSECTION. 



Divide the aponeurosis of the occipitofrontalis in the median line and also 

 over the vertex of the head from ear to ear. 



Reflect the anterior triangular portion forward and downward ; when near 

 the orbit the corrugator supercilii will be exposed. By turning the muscle 

 still further downward the supra-orbital notch or foramen and its contents will 

 be exposed. 



Reflect the posterior half of the occipitofrontalis. The temporal fascia is 

 now exposed. After learning its attachments cut it away from its upper attach- 

 ment, beginning at the external angular process of the frontal bone, and turn 

 it downward. 



This discloses the temporal muscle. 



