Table 2.

Descriptive data of PD patients with STN neuronal activity explored

Patient	Age, y	DD, y	Preoperative levodopa, mg	UPDRS-III score	Neurons, n	Emotion-related neurons, n
1	64	14	1,375	31	8	1
2	61	14	1,200	37	5	0
3	46	15	1,000	40	10	1
4	63	30	1,250	50	2	1
5	53	12	700	37	7	1
6	69	9	750	47	2	0
7	49	12	1,550	65	4	1
8	53	11	1,663	45	5	1
9	64	17	1,500	31	11	2
10	42	9	740	33	16	3
11	55	19	1,980	35	8	2
12	60	14	1,060	18	7	0
13	43	9	1,100	34	5	2

Age refers to age on the day of surgery; DD, PD duration; preoperative levodopa, dose/day in mg, including levodopa-equivalent dosage of dopamine agonist (patient 4 was also treated with mianserin, and patients 6, 7, 12, and 13 were also treated with citalopram); UPDRS-III, motor score of the Unified Parkinson´s Disease Rating Scale in the off-medication condition; neurons, number of subthalamic neurons unrelated to eye movements; emotion-related neurons, number of neurons responding to emotional stimuli.