You suspect an involuntary neurological movement sign in a patient. Before revealing the answer, decide how you would assess for this.

Observe the movement carefully, noting its characteristic distribution and quality: sudden brief twitches suggest tics, rhythmic shaking at rest or on intention suggests tremor, a twisted neck posture suggests torticollis, and abrupt coarse jerks or milder jerks suggest chorea. Ask about relevant associated conditions, such as a family history of Huntington's disease, rheumatic illness, thyroid disease, or multiple sclerosis, depending on the pattern observed. Note whether the movement worsens with emotional disturbance or anxiety, while remembering this alone does not establish a psychogenic origin, since organic movements are also worsened by emotional disturbance. Take a careful antipsychotic medication history to help distinguish these signs from tardive dyskinesia or other medication-associated movement disorders.