Typical neurological exam findings
Normal mental status
Normal cranial nerve and sensory exam
Motor exam tests and findings
Spooning - patient seated with arms fully extended forward from shoulders with pronated hands and fingers spread. Typical finding is symmetric hyperextension of the MCP joint (so the arms and hands look like spoons)
Touchdown - patient raises arms and hands up fully extended with palms facing one another (as if making the "touchdown" sign). Typical finding is pronation of one or both hands and flexion of the elbows
Milkmaid's grip - patient grips examiners index and middle fingers. Typical finding is partial release of grip and re-gripping, as if "milking the cow
Darting tongue - patient sticks tongue out from mouth. Typical finding is tongue alternately withdrawing and protruding because patient cannot maintain the motor command
Exam should also search for other manifestations of acute rheumatic fever including carditis, migratory polyarthritis, subcutaneous nodules, and erythema marginatum
Normal mental status
Normal cranial nerve and sensory exam
Motor exam tests and findings
Spooning - patient seated with arms fully extended forward from shoulders with pronated hands and fingers spread. Typical finding is symmetric hyperextension of the MCP joint (so the arms and hands look like spoons)
Touchdown - patient raises arms and hands up fully extended with palms facing one another (as if making the "touchdown" sign). Typical finding is pronation of one or both hands and flexion of the elbows
Milkmaid's grip - patient grips examiners index and middle fingers. Typical finding is partial release of grip and re-gripping, as if "milking the cow
Darting tongue - patient sticks tongue out from mouth. Typical finding is tongue alternately withdrawing and protruding because patient cannot maintain the motor command
Spooning - patient seated with arms fully extended forward from shoulders with pronated hands and fingers spread. Typical finding is symmetric hyperextension of the MCP joint (so the arms and hands look like spoons)
Touchdown - patient raises arms and hands up fully extended with palms facing one another (as if making the "touchdown" sign). Typical finding is pronation of one or both hands and flexion of the elbows
Milkmaid's grip - patient grips examiners index and middle fingers. Typical finding is partial release of grip and re-gripping, as if "milking the cow
Darting tongue - patient sticks tongue out from mouth. Typical finding is tongue alternately withdrawing and protruding because patient cannot maintain the motor command
Group A strep testing (i.e. with throat culture)
Serum testing for antistreptolysin O and antideoxyribonuclease B
CRP, ESR
Cardiac workup including EKG and echo
Consider LP and/or neuroimaging if considering alternative diagnoses
Sydenham's chorea
Tourette
Wernicke-Korsakoff syndrome
Behavioral or emotional disorders
Parkinson's disease
Sydenham's chorea 
Tardive dyskinesia
Antiphospholipid syndrome