medial rectus muscle


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Related to medial rectus muscle: lateral rectus muscle

me·di·al rec·tus mus·cle

(mē'dē-ăl rek'tŭs mŭs'ĕl)
Origin, medial part of the anulus tendineus communis; insertion, medial part of sclera of the eye; action, adduction; nerve supply, oculomotor.
Synonym(s): musculus rectus medialis [TA] .

medial rectus muscle

Extraocular muscle. Origin: tendinous ring around optic nerve at rear of orbit. Insertion: nasal edge of eyeball in front of its equator. Nerve: oculomotor (CN III). Action: turns eye medially.
See also: muscle
References in periodicals archive ?
5-cm dumbbell-shaped mass in the right medial rectus muscle (figure 1).
Infiltration of the medial rectus muscle fibers was readily apparent.
B-mode standardized orbital ultrasonography (SOU) demonstrated a large echolucent space that was encompassed by an echodense area, representing an abscess between the medial rectus muscle and the defective lamina papyracea (figure 2).
Inflammation of the orbit is well demonstrated by an additional soft-tissue mass, thickening of the extraocular muscles, proptosis, and a lateral displacement of the globe and the medial rectus muscle.

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