Deep Brain Stimulation Frequency of the Subthalamic Nucleus Affects Phonemic and Action Fluency in Parkinson’s Disease

Table 2

Stimulation parameters at the moment of inclusion and verbal fluency outcomes of each subject.

Subject	Sex	Age	Frequency (Hz)	Stimulation contacts (all cases +)		Amplitude (V)		Pulse width (μs)		Verbal fluency outcomes (at 60 Hz)
				L	R	L	R	L	R	Action	Phonemic (P)	Phonemic (FAS)
1	M	49	90	3-	11-	3.0	3.0	60	60	—
2	F	66	110	3-	10-	3.6	1.8	90	90
3	M	75	130	0-, 1-	8-, 9-	3.3	3.3	60	60	ND		ND
4	M	65	130	2-, 3-	11-	3.0	3.6	60	90
5	F	62	110	2-	11-	2.8	2.6	60	60	ND		ND
6	M	53	180	1-	9-, 10-	2.6	2.7	90	90
7	M	31	140	2-, 3-	8-, 9-	3.6	3.6	90	120
8	M	50	60	0-	8-, 9-	2.5	3.0	90	90
9	M	70	130	1-, 2-	9-, 10-	3.0	3.2	90	90		ND
10	M	47	110	0-	11-	2.8	2.8	60	60
11	M	46	140	0-	9-	2.6	3.0	90	90
12	M	70	110	3-	11-	3.6	3.6	90	90	ND
13	M	59	160	2-	8-	3.5	3.5	120	90			ND
14	M	47	110	1-	9-	1.0	2.0	60	90	—	—	—
15	M	61	120	2-	11-	3.4	3.4	60	60
16	M	66	160	2-	9-	3.2	3.6	90	90		ND	ND
17	F	59	120	2-	5-	3.2	3.2	90	90
18	F	48	130	3-	8-	3.9	2.2	60	60	—	—	—
19	M	51	110	2-	10-	3.6	3.6	90	90
20	M	58	130	0-	8-	2.2	2.0	90	60	—

F: female; L: left; M: male; R: right; : improvement; : worsening; ND: no difference; “-”: cathode/negative electrode contact.