1. All of the following are due to disorders of the extrapyramidal system except A. Tremor B. Spasmodic torticollis C. Clasp-knife rigidity D. Akathisia E. Festinant gait 2. Which of the following is...

1. All of the following are due to disorders of the extrapyramidal system except A. Tremor B. Spasmodic torticollis C. Clasp-knife rigidity D. Akathisia E. Festinant gait 2. Which of the following is true about essential tremor? A. It has a frequency of 2–4 Hz. B. It is abolished on action. C. Alcohol may reduce essential tremor. D. It most commonly affects the head.