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Lateral pectoral nerve

Branches · detail · C5 C6 C7

Named for its cord of origin, not its position on the muscle. Supplies pectoralis major directly.

Traced from the start

  1. C5 nerve rootC6 nerve root
  2. Upper trunk
  3. C7 nerve root
  4. Middle trunk
  5. Anterior division of the upper trunkAnterior division of the middle trunk
  6. Lateral cord
  7. Lateral pectoral nerve

Detail

Motor
Pectoralis major, chiefly the clavicular head

When it goes wrong

Injury during breast or axillary surgery

Weak shoulder flexion and adduction, with wasting of the upper pectoralis major.

Practise this structure

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