Anatomy study note · Upper limb

Teres minor

A small rotator cuff muscle along the upper lateral border of the scapula. It forms the upper boundary of the quadrangular space.

Key points

• Upper lateral border of the scapula → greater tuberosity (lowest).
• Axillary nerve (unlike the other cuff muscles).
• Lateral rotation; rotator cuff (T of SITS).
• 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. 259, 303–306
• 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

• Thenar muscles
• Thoracodorsal nerve
• Trapezius
• Triceps brachii
• Ulna
• Ulnar artery
• Ulnar nerve
• Veins of the hand
• Wrist joint
• Abductor pollicis longus
• Acromioclavicular joint
• Adductor pollicis

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