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Brachial Plexus Cords

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Brachial Plexus Cords

Brachial Plexus Cords

Brachial Plexus Cords-of-wood
Picmonic
Lateral, posterior and medial cords are formed from the anterior and posterior divisions of the superior, medial and inferior trunks.
9 KEY FACTS
Lateral Cord
Ladder Cord

Formed from the anterior divisions of the superior trunk (C5-C7). It branches in to the lateral pectoral nerve, musculocutaneous nerve, and the median nerve.

Lateral Pectoral Nerve
Ladder Pecks Nerve

Innervates the pectoralis major muscle.

Posterior Cord
Post Cord

Formed from the posterior divisions of all trunks (C5-T1). It branches into the axillary nerve (C5, C6) and radial nerve (C5, C6, C7, C8, T1). It also branches into the subscapular (C5, C6) nerves and thoracodorsal nerve.

Upper Subscapular Nerve
Upper Sub-scapula Nerve

Innervates the upper part of the subscapularis (internally rotates head of the humerus).

Thoracodorsal Nerve
Thor-rocket-dorsal-fin Nerve

Innervates the latissimus dorsi muscle, which medially rotates the arm.

Lower Subscapular Nerve
Lower Sub-scapula Nerve

Innervates the lower part of the subscapularis (internally rotates head of the humerus) and the teres major (medially rotates arm).

Medial Cord
Metal Cord

Formed from the anterior divisions of the inferior trunk (C8-T1). It branches into the median pectoral nerve, medial cutaneous nerve of the arm and forearm, and the ulnar nerve.

Medial Pectoral Nerve
Metal Pecks Nerve

Innervates the pectoralis major and pectoralis minor.

Medial Cutaneous Nerve of Arm and Forearm
Metal Skin Nerve with Arm and Fork-arm

Includes the medial brachial cutaneous nerve and the medial antebrachial cutaneous nerve which together innervate the medial aspects of the arm and forearm.

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