Superior rectus muscle

Superior rectus
File:Eye movements elevators.jpg View of the eye from above, showing the action of the superior rectus muscle.
Details
Latin	musculus rectus superior bulbi
Origin	annulus of Zinn at the orbital apex
Insertion	7.5 mm superior to the limbus
Nerve	oculomotor nerve
Actions	elevates, intorsion, and rotates medially the eye
Identifiers
Dorlands /Elsevier	m_22/12550523
TA
TH	{{#property:P1694}}
TE	{{#property:P1693}}
FMA	{{#property:P1402}}
Anatomical terms of muscle [[[d:|edit on Wikidata]]]

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.

Structure

See also: Extraocular muscles

Function

See also: Eye movement

Clinical significance

Testing

The superior rectus muscle is the only muscle that is capable of elevating the pupil when it is in a fully abducted position.

Additional images

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

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  Superior rectus muscle

• Slide2uu.JPG

  Superior rectus muscle

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  Extrinsic eye muscle. Nerves of orbita. Deep dissection.

• Slide2abaa.JPG

  Extrinsic eye muscle. Nerves of orbita. Deep dissection.

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  Extrinsic eye muscle. Nerves of orbita. Deep dissection.

• Slide4abab.JPG

  Extrinsic eye muscle. Nerves of orbita. Deep dissection.

• Slide5abab.JPG

  Extrinsic eye muscle. Nerves of orbita. Deep dissection.

• Slide6abab.JPG

  Extrinsic eye muscle. Nerves of orbita. Deep dissection.

• Slide7abab.JPG

  Extrinsic eye muscle. Nerves of orbita. Deep dissection.

• Slide8ababa.JPG

  Extrinsic eye muscle. Nerves of orbita. Deep dissection.

External links

• Anatomy figure: 29:01-02 at Human Anatomy Online, SUNY Downstate Medical Center
• Diagram