Anatomy study note · Head and neck

Inferior oblique

The only extraocular muscle arising from the front of the orbital floor.

Key points

• Only muscle from the orbital floor.
• CN III.
• Up and out; test: look in, then up.
• 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

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 12, PDF pp. 1574–1575, 1585, 1589–1593
• 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

• Inferior rectus
• Insula
• Internal capsule
• Internal carotid artery
• Internal jugular vein
• Iris
• Lacrimal apparatus
• Laryngeal membranes and ligaments
• Larynx
• Lateral cricoarytenoid
• Lateral pterygoid
• Lateral rectus

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