Five Cases of Primary Writing Tremor

J Korean Neurol Assoc > Volume 19(1); 2001 > Article

Journal of the Korean Neurological Association 2001;19(1): 52-55.

원발성 서진 5예

김상수, 박영석 ·김종국 ·김재우

동아대학교 의과대학 신경과학교실

Five Cases of Primary Writing Tremor

Sang Su Kim, M.D., Young Seok Park, M.D., Jong Kuk Kim, M.D., Jae Woo Kim, M.D.

Department of Neurology, Dong-A University College of Medicine

Abstract

Primary writing tremor is considered to be a task-specific tremor occurring when handwriting. We describe the clini-cal and electrophysiological features of 5 patients. Two of the patients had a family history of the tremor. Alcohol was effective in reducing the tremor in 3 of the patients. Two patients showed a co-contraction and three alternate contrac-tions between agonist and antagonist muscles. The frequency of the tremors was 5 to 6 Hz. Primidone and propranolol were effective in reducing tremor. Considering the clinical and electrophysiological features, it is suggested that prima-ry writing tremor might be a variant of essential tremor.J Korean Neurol Assoc 19(1):52~55, 2001Key Words : Primary writing tremor, Essential tremor, EMG