Table 2.

Parkinson's disease patient characteristics.

Pt	Age at surgery (years)	Gender	Duration of disease (years)	UPDRS III off medication	UPDRS III on medication	UPDRS III tremor off* medication
1	65	M	15	43	10	3
2	47	M	6	53	26	1
3	49	F	6	37	10	3
4	58	F	11	37	22	0
5	51	M	15	48	28	0
6	61	M	10	33	17	1
7	70	M	5	17	2	2
8	48	M	5	32	9	4
9	63	M	4	32	8	0
10	72	M	6	43	30	3

Duration of disease, interval between diagnosis and initial surgery; F, female; M, male; Pt, patient; UPDRS III, Unified Parkinson's Disease Rating Scale part III;

^*UPDRS resting tremor score (part III, item 20) for upper extremity contralateral to recorded hemisphere.