Superior rectus muscle

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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
Action:	elevates, adducts, and rotates medially the eye
Dorlands/Elsevier	m_22/12550523

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

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
• Dictionary at eMedicine Superior+rectus+muscle
• Diagram

Muscles of head and neck: the head

scalp/eyelid: occipitofrontalis (occipitalis, frontalis) - orbicularis oculi - corrugator supercilii - depressor supercilii extraocular: levator palpebrae superioris - superior tarsal - rectus (superior, inferior, medial, lateral) - oblique (superior, inferior) - intraocular: ciliary - iris dilator - iris sphincter ear: auriculares - temporoparietalis - stapedius - tensor tympani nose: procerus - nasalis (dilatator naris) - depressor septi nasi - levator labii superioris alaeque nasi mouth: levator anguli oris/depressor anguli oris - levator labii superioris/depressor labii inferioris - zygomaticus (major, minor) - mentalis - buccinator - orbicularis oris - risorius mastication: masseter - temporalis - pterygoid (lateral, medial) tongue: extrinsic (genioglossus - hyoglossus - chondroglossus - styloglossus) intrinsic (superior longitudinal - inferior longitudinal - transversus - verticalis) soft palate: levator veli palatini - tensor veli palatini - musculus uvulae - palatoglossus - palatopharyngeus pharynx: pharyngeal constrictor (inferior, middle, superior) - stylopharyngeus - salpingopharyngeus larynx: cricothyroid - posterior cricoarytenoid - lateral cricoarytenoid - arytenoid - thyroarytenoid