Anatomy study note · Upper limb

Anconeus

A small triangular muscle behind the elbow that helps triceps.

Key points

• Lateral epicondyle → lateral olecranon.
• Radial nerve.
• Assists triceps in elbow extension.
• Limb muscles: in situ from limb-bud mesenchyme.
• Upper limb bud C4–T2; lower limb bud L2–S2.
• 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. 3, PDF p. 309
• Inderbir Singh’s Human Embryology, ch. 7, PDF p. 109; ch. 10, PDF pp. 142–145
• BRS Cell Biology & Histology, 7th ed., ch. 8, PDF pp. 135–144

More from the upper limb

• Axillary artery
• Axillary lymph nodes
• Axillary nerve
• Axillary vein
• Basilic vein
• Biceps brachii
• Brachial artery
• Brachial plexus
• Brachialis
• Brachioradialis
• Breast
• Carpal bones

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