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Which is the most accurate description of how to differentiate a C7 radiculopathy from a brachial plexopathy involving the middle trunk on needle EMG?

Both produce identical findings; localization is impossible Paraspinal muscle abnormalities (multifidus) localize to the root level; plexopathy typically spares paraspinals Plexopathy involves paraspinal muscles consistently Radiculopathy never causes muscle abnormalities

Correct Answer:

Paraspinal muscle abnormalities (multifidus) localize to the root level; plexopathy typically spares paraspinals

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