superior rectus muscle


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su·pe·ri·or rec·tus mus·cle

(sŭ-pēr'ē-ŏr rek'tŭs mŭs'ĕl)
Origin, superior part of common tendinous ring; insertion, superior part of sclera of the eye; action, primary, elevation; secondary, adduction and intorsion; nerve supply, oculomotor.
Synonym(s): musculus rectus superior [TA] .

superior rectus muscle

Extraocular muscle. Origin: tendinous ring around optic nerve at rear of orbit. Insertion: upper edge of eyeball in front of its equator. Nerve: oculomotor (CN III). Action: turns eye up and medially.
See: extraocular for illus.
See also: muscle
References in periodicals archive ?
Caption: Figure 1: Immunohistochemical staining for Ki-67 (a), CD11 beta (b), and F4/80 (c) of the superior rectus muscle (SRM) 3 days after reinsertion of the SRM in a rabbit model: the normal saline injection group (above) and the Y-27632 injection group (below).
Coronal views on MRI scan of the right eye showed 2 mm nasal displacement of the right inferior rectus relative to the right superior rectus muscle and 3 mm inferior displacement of the right lateral rectus relative to the right medial rectus muscle.
Which of the following best describes the functional origin of the superior rectus muscle?
Given her atypical presentation, we got MRI of orbit with contrast done that revealed ill-defined mixed signal intensity lesion in the intraconal compartment of the left orbit involving Medial Rectus, Inferior Rectus and posterior part of the Superior Rectus muscles. PET scan was done that ruled out secondaries.
c) Within the orbit the superior division of the nerve carries fibres for the levator palpebrae and superior rectus muscles

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