Anatomy study note · Head and neck

Omohyoid

A two-bellied strap muscle with an intermediate tendon held to the clavicle and first rib by a fascial sling.

Key points

• Scapula ↔ hyoid via an intermediate tendon.
• Ansa cervicalis.
• Depresses the hyoid.
• Ventral-ramus neck muscles: ventral parts of cervical myotomes.
• Trunk muscles: from myotomes of the somites.
• 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. 1616–1617
• Inderbir Singh’s Human Embryology, ch. 7, PDF pp. 108–109
• BRS Cell Biology & Histology, 7th ed., ch. 8, PDF pp. 135–144

More from the head and neck

• Ophthalmic artery
• Ophthalmic nerve
• Ophthalmic veins
• Optic nerve
• Orbicularis oculi
• Orbicularis oris
• Palate
• Palatine tonsil
• Palatopharyngeus
• Parathyroid glands
• Parietal bone
• Parietal lobe

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