PMID- 31123860 OWN - NLM STAT- MEDLINE DCOM- 20210618 LR - 20210618 IS - 1432-1459 (Electronic) IS - 0340-5354 (Linking) VI - 267 IP - 12 DP - 2020 Dec TI - The effect of transcranial direct current stimulation on upper limb motor performance in Parkinson's disease: a systematic review. PG - 3479-3488 LID - 10.1007/s00415-019-09385-y [doi] AB - BACKGROUND AND PURPOSE: Parkinson's disease (PD) reduces independence and quality of life through deterioration of upper limb motor function. Transcranial direct current stimulation (tDCS) may offer an alternative, adjunctive therapy for PD. However, the efficacy of tDCS for upper limb motor rehabilitation in PD is unknown. In this systematic review, evidence is compiled regarding the effects of tDCS on upper limb motor function in PD. METHODS: Studies of tDCS applied to PD patients that assessed upper limb motor function, conducted between January 2000 and November 2018, were screened for inclusion via a systematic search of Medline, Cochrane, PsycINFO, EMBASE, CINAHL, and Web of Science. RESULTS: Ten out of 606 studies were included and their findings synthesized into five categories regarding the effects of tDCS on: (1) Unified Parkinson's Disease Rating Scale motor section (UPDRS III), (2) upper limb motor tasks, (3) manual dexterity, (4) reaction time, and (5) neurophysiology. CONCLUSIONS: When applied to the primary motor cortex, tDCS may improve UPDRS III and the speed and force of movement. Considerable variation was found in tDCS parameters and further study is needed to clarify the long-term effects of tDCS on both simple and complex motor tasks and to compile relevant neurophysiological evidence. FAU - Simpson, Michael William AU - Simpson MW AUID- ORCID: 0000-0002-9086-4384 AD - Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Hong Kong. FAU - Mak, Margaret AU - Mak M AUID- ORCID: 0000-0002-2461-9962 AD - Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Hong Kong. Margaret.Mak@polyu.edu.hk. LA - eng PT - Journal Article PT - Review PT - Systematic Review DEP - 20190523 PL - Germany TA - J Neurol JT - Journal of neurology JID - 0423161 SB - IM MH - Humans MH - *Motor Cortex MH - *Parkinson Disease/therapy MH - Quality of Life MH - *Transcranial Direct Current Stimulation MH - Upper Extremity OTO - NOTNLM OT - Motor function OT - Parkinson's disease OT - Upper limb OT - tDCS EDAT- 2019/05/28 06:00 MHDA- 2021/06/22 06:00 CRDT- 2019/05/25 06:00 PHST- 2019/02/19 00:00 [received] PHST- 2019/05/16 00:00 [accepted] PHST- 2019/05/14 00:00 [revised] PHST- 2019/05/28 06:00 [pubmed] PHST- 2021/06/22 06:00 [medline] PHST- 2019/05/25 06:00 [entrez] AID - 10.1007/s00415-019-09385-y [pii] AID - 10.1007/s00415-019-09385-y [doi] PST - ppublish SO - J Neurol. 2020 Dec;267(12):3479-3488. doi: 10.1007/s00415-019-09385-y. Epub 2019 May 23.