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Intramuscular course and entrapment of the C5 nerve root. A 48-year-old man after a recent motor vehicle crash. Sagittal STIR (A) and coronal MIP 3D STIR SPACE (B) images show the intramuscular course of the C5 nerve root with relatively anterior and lateral positioning and mild flattening (large arrow) compared with the other brachial plexus nerve roots (small arrows). The patient had no symptoms referable to TOS pathology.
