Anatomy study note · Upper limb

Flexor carpi ulnaris

The most medial superficial flexor. The ulnar nerve enters the forearm between its two heads.

Key points

• Medial epicondyle + olecranon → pisiform, hamate, MC5.
• Ulnar nerve (one of only 1½ forearm muscles it supplies).
• Wrist flexion + adduction.
• Ulnar nerve enters the forearm between its heads.
• 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 pp. 308, 347–349
• 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

• Flexor digitorum profundus
• Flexor digitorum superficialis
• Flexor pollicis longus
• Flexor retinaculum and carpal tunnel
• Humerus
• Hypothenar muscles
• Infraspinatus
• Intercarpal and carpometacarpal joints
• Interossei of the hand
• Latissimus dorsi
• Levator scapulae
• Long thoracic nerve

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