Superior rectus muscle

Superior rectus

View of the eye from above, showing the action of the superior rectus muscle.
Details
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
Latin musculus rectus superior bulbi
Dorlands
/Elsevier		 m_22/12550523
TA A15.2.07.010
FMA 49035

Anatomical terms of muscle

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.

Lacrimal nerve Trochlear nerve Trochlear nerve Trochlear nerve Abducens nerve Abducens nerve Oculomotor nerve Oculomotor nerve Supraorbital nerve Supratrochlear nerve Supratrochlear nerve Ophthalmic artery Ophthalmic artery Ophthalmic artery Ophthalmic artery Ophthalmic artery Ophthalmic artery Ophthalmic artery Maxillary nerve Mandibular nerve Trigeminal nerve Trochlear nerve Trochlear nerve Trochlear nerve Trochlear nerve Ophthalmic nerve Lacrimal nerve Frontal nerve Pupil Iris Cornea Limbus Superior rectus muscle Superior oblique muscle Superior oblique muscle Superior oblique muscle Superior oblique muscle Superior oblique muscle Trochlea of superior oblique Lateral rectus muscle Lateral rectus muscle Lateral rectus muscle Lateral rectus muscle Medial rectus muscle Medial rectus muscle Optic nerve Trigeminal ganglion
The superior rectus muscles is shown in this image of the right eye from above. Hover the mouse over the structures for their names. Click for more information.

Structure

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.[1]

Additional images

References

  1. ↑ "Eye Theory". Cim.ucdavis.edu. Retrieved 2012-12-02.

External links

This article is issued from Wikipedia - version of the Wednesday, September 09, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.