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Inferior 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 inferior bulbi | |
Gray's | subject #227 1022 | |
Origin: | annulus of Zinn at the orbital apex | |
Insertion: | 6.5 mm inferior to the limbus | |
Artery: | ||
Nerve: | inferior branch of oculomotor nerve | |
Action: | depression and adduction | |
Dorlands/Elsevier | m_22/12550484 |
The inferior rectus muscle is a muscle in the orbit.
Actions[]
It depresses, adducts, and rotates laterally the eye.
Innervation[]
As with most of the muscles of the orbit, it is innervated by the oculomotor nerve (Cranial Nerve III).
Additional images[]
External links[]
- LUC ir
- SUNY Figs 29:01-07
- Dictionary at eMedicine inferior+rectus+muscle
- Norman/Georgetown lesson3 (orbit5)
- Diagram at mun.ca
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 |
hu:Musculus rectus inferior nl:Musculus rectus inferior
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