Inferior rectus muscle

Inferior rectus muscle

Muscle infobox
Name = Inferior rectus
Latin = musculus rectus inferior bulbi
GraySubject = 227
GrayPage = 1022


Caption = "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

| Caption2 = Sagittal section of right orbital cavity.
Origin = annulus of Zinn at the orbital apex
Insertion = 6.5 mm inferior to the limbus
Blood =
Nerve = inferior branch of oculomotor nerve
Action = depression and adduction
DorlandsPre = m_22
DorlandsSuf = 12550484
The inferior rectus muscle is a muscle in the orbit.

Actions

It depresses, adducts, rotates laterally, and extorts the eye.

Innervation

As with most of the muscles of the orbit, it is innervated by the oculomotor nerve (Cranial Nerve III).


=Additional

External links

*
*
*
* (NormanAnatomyFig|orbit5)
* [http://www.med.mun.ca/anatomyts/head/eyemusc.gifDiagram at mun.ca]


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  • inferior rectus — noun the ocular muscle whose contraction turns the eyeball down and medially • Syn: ↑inferior rectus muscle, ↑rectus inferior • Hypernyms: ↑ocular muscle, ↑eye muscle …   Useful english dictionary

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  • Lateral rectus muscle — Muscle infobox Name = Lateral rectus Latin = musculus rectus lateralis bulbi GraySubject = 227 GrayPage = 1022 Caption = Rectus muscles: 2 = superior, 3 = inferior, 4 = medial, 5 = lateral Oblique muscles: 6 = superior, 8 = inferior Other muscle …   Wikipedia

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