The exclusion criteria were:
(1) history of surgery or other significant injury to either upper limb;
(2) current treatment with botulinum toxin injections or intrathecal baclofen;
(3) previous neurological illness such as head trauma, epilepsy, or demyelinating disease;
(4) complicating medical problems such as uncontrolled hypertension, diabetes with signs of polyneuropathy, severe renal, cardiac or pulmonary disease, or any other severe concurrent medical problem.
Total testing time did not exceed two hours for this visit.