Review of systems should seek symptoms of causative disorders, including Multiple episodic neurologic problems: Multiple sclerosis Recent sudden onset of motor weakness, language difficulties, or dysarthria: Stroke Confusion and fever: Meningitis, encephalitis, brain abscess, or brain tumor Muscle rigidity, gait and postural problems, and slowness of movement: Parkinson disease or other forms of parkinsonism Weight loss, increased appetite, palpitations, diarrhea, and heat intolerance: Hyperthyroidism Sensory deficits: Peripheral neuropathy Agitation and hallucinations: Alcohol withdrawal or drug toxicity Past medical history should cover conditions associated with tremor (see table Some Causes of Tremor).