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Inferior rectus
Eyemuscles
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
Gray888
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[]

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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