86 MUSCULAR SYSTEM. 



4. ABDUCENS Vel DEPRIMENS AUREM. 



Parotido-auricularis. 



Situation. — Below, and to the outer side of the root of the ear. 



Form. — Broad, thin, membraniform. 



Attachment. — To the surface of the parotid gland by dense 

 cellular membrane ; and to the outer and fore part of the concha, 

 just below its orifice. 



Relations. — Externally, with the panniculus and skin ; inter- 

 nally, with the parotid gland. 



Direction. — From below upwards; inclining a little forwards. 



Structure. — Fleshy, and more substantial than the attoUentes. 



Action. — To abduct the ear, and assist in depressing it. 



2.— PALPEBRAL REGION. 



LEV ATORPALPEBRilC SUPERIOR IS CO RRU GATOR SLPERClLll. 



Fronto-superciliaris. 



Situation. — Above the orbit. 



Figure. — Short, thin, narrow, pyramidal. 



Attachment. — Blended with the aponeurotic expansion upon 

 the forehead, above the orbital arch; and inserted into the supe- 

 rior part of the upper eyelid, nearer to its inner than outer angle. 



Relations. — Internally, with the skin ; externally, with the 

 orbital arch ; inferiorly, blended with the next muscle. 



Direction. — Oblique : from above downwards, and from within 

 outwards. 



Structure. — Superiorly, aponeurotic ; inferiorly, pale and de- 

 licately fleshy. 



Action. — To draw up the upper eyelid, and particularly the 

 inner part of it. 



ORBICULARIS PALPEBRARUM. MuSCuluS CiUaris. 



Situation. — Within the eyelids: in front of the base of the 

 orbit. 



Figtir e.—OhVique\y oval ; slit in its long diameter. 



Attachment. — To the orbital portion of the ossa unguis et 

 frontis ; to the palpebral ligament; and to the skin of both lids. 



Relations. — Externally, with the skin ; internally, with the 

 membrana conjunctiva ; superiorly, with the former muscle ; in- 

 feriorly with the levator labii; towards the margins of the lids, 

 with the tarsi; at the inner canthus, with the lachrymal sac. 



Structure. — Fleshy : disposed in little packets or fasciculi. 



Action. — To approxinmtc or shut the eyelids. 



