This intricate network of nerves serves as the primary communication highway between the central nervous system and the entire upper limb. In adults, high-energy trauma can cause avulsion, where the nerve root is torn from the spinal cord, or rupture, where the nerve is severed further away.
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Diagnostic Approaches Modern diagnostics rely heavily on electrodiagnostic studies, such as electromyography (EMG) and nerve conduction studies (NCS). Understanding the brachial plexus simple is fundamental for anyone involved in healthcare, from medical students to seasoned physiotherapists.
A classic example is Erb's palsy in newborns, which occurs during a difficult delivery. These injuries manifest as a limp arm, lack of sensation, or a clawed hand, depending on the specific structures affected.
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Common Injuries and Pathologies Brachial plexus injuries are often the result of trauma, including motor vehicle accidents, contact sports, and childbirth. The cords then give rise to the terminal branches, including the musculocutaneous, median, ulnar, and radial nerves, which innervate everything from the powerful biceps to the delicate intrinsic muscles of the hand.
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