Anatomy study note · Head and neck

Medial rectus

The extraocular muscle that turns the eye medially; both medial recti contract to converge the eyes on a near object.

Key points

• CN III; adducts.
• Convergence for near vision.
• Medial check ligament.
• Oculomotor muscles: somitomeres 1–2.
• Skeletal muscle: multinucleated, peripheral nuclei, striated.
• Epimysium → perimysium → endomysium.

The full note in the atlas also covers

Origin · Insertion · Action · Nerve supply · Histology · Development · Clinical notes

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 12, PDF pp. 1574–1575, 1586–1593, 1601
• Inderbir Singh’s Human Embryology, ch. 7, PDF p. 109; ch. 9, PDF p. 126
• BRS Cell Biology & Histology, 7th ed., ch. 8, PDF pp. 135–144

More from the head and neck

• Medulla oblongata
• Midbrain
• Middle cerebral artery
• Muscles of facial expression
• Musculus uvulae
• Mylohyoid
• Nasal bone
• Occipital bone
• Occipital lobe
• Occipitofrontalis
• Oculomotor nerve
• Olfactory nerve

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