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The brachial plexus is a complex network of nerves that originates in the neck and extends into the arm. Comprising spinal nerve roots C5 to T1, it controls the motor and sensory functions of the shoulder, arm, and hand. Injuries or trauma to the brachial plexus can result in weakness, numbness, or loss of function in the affected limb. These injuries often occur during childbirth, accidents, or sports-related incidents. Management may involve physical therapy or, in severe cases, surgical intervention to restore optimal nerve function and improve overall limb mobility.