Image d'archive à partir de la page 486 de Cunningham's Text-book d'anatomie (1914). Cunningham's Text-book d'anatomie cunninghamstextb00cunn Année : 1914 ( LE FASCIA ET LES MUSCLES DE L'OEBIT. 453.-Nerve-Supply Le muscle est fourni par la division supérieure du nerf oculo-rnotor. Actions.-Il élève la paupière supérieure et s'oppose à l'action de l'orbicularis oculi muscle. Superior Rectus palpebr Levator superioris.e mm. Recti.-La recti muscles sont au nombre de quatre-supérieure, inférieure, médiane et latérale. Ils sont tous issus d'une orbicularis oculi anneau membraneux entourant le trou optique, whic
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Archive image from page 486 of Cunningham's Text-book of anatomy (1914). Cunningham's Text-book of anatomy cunninghamstextb00cunn Year: 1914 ( THE FASCIA AND MUSCLES OF THE OEBIT. 453 Nerve-Supply.—The muscle is supplied by the superior division of the oculo-rnotor nerve. Actions.—It elevates the upper eyelid and antagonises the action of the orbicularis oculi muscle. Rectus superior Levator palpebr.e superioris Mm. Recti.—The recti muscles are four in number—superior, inferior, medial, and lateral. They all arise from a orbicularis oculi membranous ring surrounding the optic foramen, which is separable into two parts—a superior common tendon, giving origin to the superior and medial recti and the superior head of the lateral rectus; and an inferior common tendon, giving origin to the medial and inferior recti and the in- ferior head of the lateral rectus. The two origins of the lateral rectus muscle are separated by the passage into the orbit of the oculo-motor, naso-ciliary, and abducent nerves. Forming flat- tened bands which lie in the fat of the orbit around the optic nerve and eye- ball, the four muscles end in tendons which pierce the fascia bulbi, and are inserted into the sclera about eight millimetres (three to four lines) behind the margin of the cornea. The superior and inferior recti are inserted in the vertical plane slightly medial to the axis of the eyeball; the lateral and medial recti in the trans- verse plane of the eyeball; and all are attached in front of the equator of the eyeball. M. Obliquus Superior.—The obliquus superior arises from the margin of the optic foramen between the rectus superior and rectus medialis. It passes forwards as a narrow muscular band medial to the rectus superior, and at the anterior margin of the orbit forms a narrow ten- don which passes through a special fibrous pulley (trochlea) attached to the roof of the orbit. Its direction is then altered, and passing laterally between the tendon of the superio
