Medial rectus muscle

Synonyms
Medial rectus muscle
ICD-11
XA95N1

The medial rectus muscle is a skeletal muscle and is part of the extraocular musculature.

Anatomy

The medial rectus muscle originates from the Common tendinous ring. The muscle runs straight anteriorly near the nasal wall of the orbit and inserts on the medial surface of the eyeball, ventral to the equator of the eyeball.

Innervation

The medial rectus muscle is innervated by the inferior division of the Oculomotor nerve[^1].

Blood supply

The muscular branches of the Arteria ophthalmica are responsible for the arterial blood supply.

Figure

Medial rectus muscle
Anatomical drawing of the orbit with the extraocular muscles and partial depiction of the medial rectus muscle. Figure adapted from Gray's Anatomy Figure 889.

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