530 ANATOMY IX A NUTSHELL 



[nsertion. — Into the aponeurosis of the upper t:\rsal cartilage, skin of 

 lid, and conjunctiva. 



Action. — Lifts the upper lid and antagonizes the Orbicularis palpebrarum. 



Nerve Supply. — A branch of the third nerve which pierces the su- 

 perior rectus muscle. 



Blood Supply'. — Muscular branches from the ophthalmic artery. 



7. Superior oblique. -Description. — This muscle belongs to the orbital 

 region and receives the fourth nerve. 



Orsgin. — From above the inner margin of optic foramen. Its tendon 

 passes through a pulley near the internal angular process of the frontal bone, 

 then beneath the Superior rectus muscle. 



Insertion. Into the sclerotic coat between the Superior rectus and Ex- 

 ternal rectus muscle at right angles to these muscles. 



PLATE CCLXXIV. 



SUPERFICIAL DORSAL VEIN 



DEEP DORSAL VEIN 



DORSAL ARTERY 



CORPUS 

 DARTOS ■ 



AREOLAR TISSUE 



ANTERIOR BRANCH - 

 BULBO-CAVERNOUS ARTERY 



CORPUS SPONGIOSIS 



A Transverse Section oe the Penis. 



Action. — it rotates the eye-ball on its antero-posterior axis, drawing the 

 cornea downward and outward. 



Nerve Supply*. — Fourth cranial nerve. 



Blood Supply. Muscular branches from the ophthalmic artery. 



8. Superior rectus. — Description. — This is the thinnest and narrowest 

 o f the Recti muscles. 



ORIGIN. From the upper margin of the optic foramen, and fibrous sheath 

 of the optic nerve. 



Insertion.- Into the sclerotic coat three or lour lines from the sclero- 

 corneal junction. 



Action. Elevates and abducts and rotates the cornea inward. 



Nerve Supply. — Third cranial nerve. 



Blood Si pply. — Muscular branches of the ophthalmic artery. 



U. Inferior rectus. 



Origin. From the ligamenl of Zinn with the Internal rectus. 



