[Writing tremor: report of a case].

Primary writing tremor is induced by a specific motor activity, generally the handwriting. The case is analyzed under clinic and therapeutic points of view. The patient had a tremor elicited by handwriting without any other concurrent neurologic alteration. He neither presented familiar antecedents nor metabolic, endocrine, iatrogenic, toxic and traumatic ones. As to the therapeutic approach, the tremor did not respond satisfactorily neither to propranolol nor to primidone. But with anticholinergics improvement of the tremor was verified.