Brachial Plexus Anatomy and Terminal Branches

Vocabulary flashcards covering the organization, mnemonic, major terminal branches, and detailed characteristics of the musculocutaneous nerve of the brachial plexus.

5 Parts of the Brachial Plexus

Roots (C5-T1), Trunks (upper, middle, lower), Divisions (anterior & posterior), Cords (lateral, posterior, medial), and Branches (5 major terminal nerves).

Real Therapists Drink Cold Beer

Mnemonic representing the five functional sections of the brachial plexus: Roots, Trunks, Divisions, Cords, Branches.

Musculocutaneous Nerve (Movement)

Terminal branch responsible for elbow flexion (biceps).

Axillary Nerve

Terminal branch responsible for shoulder abduction (deltoid).

Radial Nerve

Terminal branch responsible for wrist/finger extension ("open your hand").

Median Nerve

Terminal branch responsible for thumb opposition and wrist flexion.

Ulnar Nerve

Terminal branch responsible for fine motor control in the hand ("cross your fingers").

Musculocutaneous Nerve Roots

Spinal roots C5, C6, C7.

Musculocutaneous Nerve Muscle Innervation

Coracobrachialis, Biceps, and Brachialis.

Musculocutaneous Nerve Sensory Distribution

Anterior lateral surface of forearm.

Musculocutaneous Nerve Clinical Impact

Loss of elbow flexion and weakened supination.