MUSCULOCUTANEOUS NERVE Peripheral Nerves The terminal branches of the brachial plexus (the musculocutaneous, median, ulnar, and radial nerves) provide the entire nerve supply to the limb below the shoulder. Of these, only the musculocutaneous and radial nerves distribute to the muscles of the upper arm. Musculocutaneous Nerve The musculocutaneous nerve (C4 to C7), a branch of the lateral cord of the brachial plexus, arises opposite the lower border of the pectoralis minor muscle. This nerve…
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