Table 2b.

Comparisons between Pre-Operative to Off and On STN DBS in Parkinson's Disease: Mean Percent differences in VMAT2 Distribution Volume Ratios (DVR) in striatal-sub-regions.

Comparison		CAD	DCA	PCA	PUT	ANP	POP	AST	VST	STR
1 Hr OFF (n = 2)	OFF versus Pre-Op	−46	−35	−78	−19	−15	−21	−39	−8	−30
	ON versus Pre-Op	−42	−32	−70	−15	−9	−19	−34	−13	−26
	ON versus OFF	9	6	35	4	6	2	8	−1	5
12 Hr OFF (n = 1)	OFF versus Pre-Op	−17	−7	−37	−5	0	−9	−14	−10	−13
	ON versus Pre-Op	−23	−15	−39	−11	−6	−17	−21	−11	−19
	ON versus OFF	−7	−9	−4	−7	−6	−8	−7	−2	−7

CAD=Caudate DCA=Dorsal CAD; PCA=Posterior CAD; PUT=Putamen; ANP=Anterior PUT; POP=Posterior PUT; AST=Associative STR; VST=Ventral STR; STR=Striatum.