Superior rectus muscle

A muscle with origin from the superior part of the common tendinous ring, with insertion into the superior part of the sclera of the eye, with nerve supply from the oculomotor nerve, and whose action directs the pupil upward and medialward.

The noun has one meaning:

Meaning #1: the ocular muscle whose contraction turns the eyeball upward and medially
  Synonyms: superior rectus, rectus superior

Superior rectus
Rectus muscles: 2 = superior, 3 = inferior, 4 = medial, 5 = lateral Oblique muscles: 6 = superior, 8 = inferior Other muscle: 9 = levator palpebrae superioris Other structures: 1 = Annulus of Zinn, 7 = Trochlea, 10 = Superior tarsus, 11 = Sclera, 12 = Optic nerve
Sagittal section of right orbital cavity.
Latin	musculus rectus superior bulbi
Gray's	subject #227 1022
Origin	annulus of Zinn at the orbital apex
Insertion	7.5 mm superior to the limbus
Artery
Nerve	oculomotor nerve
Actions	elevates, intorsion, and rotates medially the eye

The superior rectus muscle is a muscle in the orbit. It is one of the extraocular muscles.

It is innervated by the superior division of the oculomotor nerve (Cranial Nerve III).

In the primary position (looking straight ahead), the superior rectus muscle's primary function is elevation, although it also contributes to intorsion and adduction.

Additional images

Eye movement of lateral rectus muscle, superior view	Eye movement of medial rectus muscle, superior view	Eye movement of inferior rectus muscle, superior view	Eye movement of superior rectus muscle, superior view
Eye movement of superior oblique muscle, superior view	Eye movement of inferior oblique muscle, superior view	Anterior view

credit: Patrick J. Lynch

The sinuses at the base of the skull.

Dissection showing origins of right ocular muscles, and nerves entering by the superior orbital fissure.

The right eye in sagittal section, showing the fascia bulbi (semidiagrammatic).

External links

• LUC sr
• SUNY Figs 29:01-02
• Superior+rectus+muscle at eMedicine Dictionary
• Diagram

v • d • e List of muscles of head and neck: the head (TA A04.1, GA 4.378) Extraocular (CN III, IV, VI) oblique (inferior, superior) · rectus (superior, inferior, medial, lateral) · levator palpebrae superioris (superior tarsal) Mastication (CN V3) masseter · temporalis · pterygoid (lateral, medial) fascia: Masseteric fascia · Temporal fascia Facial (CN VII) Ear auriculares (anterior, superior, posterior) · temporoparietalis Scalp/eyelid occipitofrontalis (occipitalis, frontalis) · orbicularis oculi (depressor supercilii) · corrugator supercilii fascia: Galea aponeurotica Nose procerus · nasalis (dilatator naris) · depressor septi nasi  · levator labii superioris alaeque nasi Mouth levator anguli oris · levator labii superioris · zygomaticus (major, minor) orbicularis oris · risorius · buccinator depressor anguli oris · depressor labii inferioris · mentalis Mouth/throat (CN IX, X, XI) (except TVP=V3) Soft palate veli palatini (tensor, levator) · musculus uvulae · palatopharyngeus (to pharnyx) · palatoglossus (to tongue) Tongue (CN XII) extrinsic (genioglossus, hyoglossus/chondroglossus, styloglossus, and palatoglossus) · intrinsic (superior longitudinal, inferior longitudinal, transverse, vertical)

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