Author, year N F/u (mo) Controlled Status of stimulation/medication at cognitive assessment Improved cognitive measure(s) Worsened cognitive measure(s) Unchanged cognitive measure(s) Alberts et al., 2008 [18 ] 8 N/A No UL, BL, ON, OFF/ON None E None Alegret et al., 2001 [75 ] 15 3 No ON/OFF None None E, PS, L, M, V Ardouin et al., 1999 [25 ] 49 3–6 No ON/inconstant E L GC, E, PS Asahi et al., 2014 [27 ] 11 12 No Unspecified None None GC, A/C, M, L, V Castelli et al., 2006 [56 ] 72 15 No ON/- E L E, L, M Castelli et al., 2007 [90 ] 19 17 No ON/ON None L E, V, M, L, Castelli et al., 2010 [39 ] 27 12 Yes ON/ON None L E, A/C, M, L Castner et al., 2007 [30 ] 18 At least 4 No ON and OFF/ON A/C None A/C Castner et al., 2008 [31 ] 8 At least 4 No ON and OFF/ON None L L Cilia et al., 2007 [16 ] 20 12 Yes ON/ON None L GC, L, E, A/C Contarino et al., 2007 [91 ] 11 60 No ON/ON None None L, V, M, E Daniele et al., 2003 [58 ] 20 12 No ON or OFF/ON None L GC, L, E, A/C, M De Gaspari et al., 2006 [21 ] 12 12 Yes ON/ON None L L, GC, E Dujardin et al., 2001 [92 ] 9 3 No ON/ON None None GC, E, M, PS, L Erola et al., 2006 [93 ] 19 12 No ON/ON None L GC, E, PS Fasano et al., 2010 [57 ] 16 96 No ON/ON None E, L, M GC, M, E, L Fraraccio et al., 2008 [62 ] 15 16 No ON and OFF/ON None A/C E, A/C, M, L, V, CG Funkiewiez et al., 2003 [94 ] 50 No ON/OFF None None GC, E Funkiewiez et al., 2004 [22 ] 70 36 No ON/69% OFF None L GC, E, M, PS Gironell et al., 2003 [36 ] 8 6 Yes ON/ON None None L, E, A/C, M, V, PS Hälbig et al., 2004 [59 ] 12 16 No ON and OFF/ON None None PS, M, GC, E, L Heo et al., 2008 [95 ] 46 12 No ON/ON None None GC, A/C, M, L, E Hershey et al., 2004 [67 ] 24 No ON and OFF/OFF None E None Hilker et al., 2004 [37 ] 8 4 Yes ON/- M None GC, E, L, A/C, M, V Jahanshahi et al., 2000 [63 ] 7 12 No ON and OFF/OFF E, A/C, PS M None Kim et al., 2014 [78 ] 103 No ON/ON None GC, but similar incidence to incidence of PDD None Krack et al., 2003 [20 ] 42 60 No ON/ON None None GC, E Krugel et al., 2014 [96 ] 14 N/A No ON/ON None None L Lhommée et al., 2012 [97 ] 63 3 No ON/ON None L GC, E Limousin et al., 1998 [70 ] 24 12 No ON/OFF None None E, L, V, PS Moretti et al., 2003 [46 ] 9 12 Yes ON/ON L L, E E, L, A/C, M, V Moro et al., 1999 [98 ] 7 9 No ON/ON None None GC, E, L, M Morrison et al., 2004 [38 ] 17 3 Yes ON and OFF/OFF None None L, A/C, M, E, V Rukmini Mridula et al., 2015 [48 ] 50 Yes ON/ON None None GC, A/C Page and Jahanshahi, 2007 [68 ] 12 N/A No ON and OFF/ON PS, A/C None PS, A/C, E Perozzo et al., 2001 [69 ] 20 6 No ON/ON and OFF None None E, A/C, M, PS Phillips et al., 2012 [49 ] 11 Yes ON and OFF/ON and OFF None None L Pillon et al., 2000 [60 ] 63 12 No ON and OFF/75% OFF None L E, PS, L, M Rothlind et al., 2007 [50 ] 15 21 No ON/ON None L A/C, E, L, V, M Rothlind et al., 2015 [47 ] 84 6 Yes ON/ON None E, A/C, PS (see text) E, M, A/C, L, PS Sáez-Zea et al., 2012 [44 ] 9 6 Yes ON/ON None L, A/C A, M, V, E, L Saint-Cyr et al., 2000 [99 ] 11 12 No ON/ON None L E, L, M, A/C, V Saint-Cyr and Albanese, 2006 [82 ] 99 6 No ON/ON None L, E E, L, A/C, M, PS Schüpbach et al., 2005 [23 ] 37 60 No ON/ON None CG, E None Silveri et al., 2012 [29 ] 12 96 No ON and OFF/ON L None None Smeding et al., 2011 [33 ] 105 12 Yes ON/ON GC, E, L, V, M, A/C L, A/C Smeding et al., 2006 [43 ] 99 6 Yes ON/ON None L, A/C L, M, V, A/C Tang et al., 2015 [73 ] 27 12 No ON/ON M L GC, M, V, A/C, E, L Tremblay et al., 2015 [28 ] 8 At least 7 wks No OFF DBS and then ON DBS/unspecified med status None L L Trepanier et al., 2000 [87 ] 9 6 No ON/ON None None A/C, M, V, L, E Whelan et al., 2003 [24 ] 5 3 No ON/ON L L None Williams et al., 2011 [40 ] 19 24 Yes ON/ON None None GC, M, E, A/C, L, V, PS Witt et al., 2004 [61 ] 23 12 No ON and OFF/ON None None L, E, GC Witt et al., 2008 [42 ] 60 6 Yes ON/ON None A/C GC, E, L, A/C Witt et al., 2013 [41 ] 31 6 Yes ON/ON None None GC, A/C, L Yágüez et al., 2014 [100 ] 30 9 No ON/ON None L, M GC, M, L, V, E York et al., 2008 [17 ] 23 6 Yes ON/ON None M GC, E, A/C, M, L, V, PS Zangaglia et al., 2009 [45 ] 32 36 Yes ON/ON None L GC, M, E, A/C Zangaglia et al., 2012 [32 ] 30 96 Yes ON/ON None L GC, M, E, A/C
