A mess of unknown reason, manifested as a restricted dystonia,
localised to some of the
neck muscles, especially the sternomastoid and trapezius; occurs in adults and tends to progress slowly; the
head movements
magnify with standing and
walking and
decrease with contractual stimuli, e.g., touching the
chin or neck.
Synonym:
dystonic torticollis,
rotatory spasm,
rotatory tic.