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Overview The brachial plexus is formed by the ventral rami of C5–T1. It supplies the upper limb and is high-yield for anatomy viva, neurology, and orthopaedic exams. Formation & Parts Roots: C5, C6, C7, C8, T1Trunks: Upper (C5+C6), Middle (C7), Lower (C8+T1)Divisions: Anterior and posterior for each trunkCords: Lateral, Medial, PosteriorBranches: Terminal and collateral branches to shoulder, arm, forearm, hand Clinical Correlations Erb palsy: upper trunk (C5–C6) — waiter's tip deformityKlumpke palsy: lower trunk (C8–T1) — claw handWinged scapula: long thoracic nerve (C5–C7)Axi...