title: Sternocleidomastoid and trapezius dissociation.
mesh_terms: D000328:Adult; D001415:Back; D006801:Humans; D008297:Male; D008416:Mastoid; D009132:Muscles / Q000294:innervation / Q000503:physiopathology; D009133:Muscular Atrophy / Q000209:etiology* / Q000503:physiopathology; D013249:Sternum; D013595:Syringomyelia / Q000150:complications* / Q000503:physiopathology