Exploring the effects of deep brain stimulation and vision on tremor in Parkinson’s disease - benefits from objective methods

Table 6 Tremor frequency and spectral power changes when altering DBS state

Changes from DBS OFF to DBS ON
Recording method and site	Vision		Frequency increase [Hz]*	Peak power reduction^a
Force platform	Closed		0.0 (0.0)	24.5 (19.9)
Force platform	Open		0.0 (0.0)	35.1 (22.1)
Body Movements	Closed	Head	0.0 (0.0)	2.0 (1.4)
		Shoulder	0.0 (0.0)	36.6 (1.0)
		Hip	0.0 (−)	3.3 (−)
		Knee	0.0 (0.0)	15.2 (14.6)
	Open	Head	−0.6 (0.5)	12.3 (5.7)
		Shoulder	−0.3 (0.3)	45.8 (22.8)
		Hip	0.0 (0.0)	66.4 (46.6)
		Knee	0.1 (0.1)	19.6 (9.4)
Body Movements - Average all sites	Closed		0.0 (0.0)	14.3 (8.0)
Body Movements - Average all sites	Open		−0.2 (0.2)	36.1 (21.1)

^aMean (SEM) values are presented for tremor frequency increase (frequency _OFF - frequency _ON) and peak power increase (power _OFF / power _ON) for the different vision states. In the cases no tremor peak was detected in one state, the frequency change was set to 0 and the power changes was calculated using the power at the frequency where the peak tremor was detected at in the other vision state

ISSN: 1743-0003