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      Do Patients With Parkinson’s Disease With Freezing of Gait Respond Differently Than Those Without to Treadmill Training Augmented by Virtual Reality?

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          Abstract

          Background. People with Parkinson’s disease and freezing of gait (FOG+) have more falls, postural instability and cognitive impairment compared with FOG−. Objective. To conduct a secondary analysis of the V-TIME study, a randomized, controlled investigation showing a greater reduction of falls after virtual reality treadmill training (TT + VR) compared with usual treadmill walking (TT) in a mixed population of fallers. We addressed whether these treadmill interventions led to similar gains in FOG+ as in FOG−. Methods. A total of 77 FOG+ and 44 FOG− were assigned randomly to TT + VR or TT. Participants were assessed pre- and posttraining and at 6 months’ follow-up. Main outcome was postural stability assessed by the Mini Balance Evaluation System Test (Mini-BEST) test. Falls were documented using diaries. Other outcomes included the New Freezing of Gait Questionnaire (NFOG-Q) and the Trail Making Test (TMT-B). Results. Mini-BEST scores and the TMT-B improved in both groups after training ( P = .001), irrespective of study arm and FOG subgroup. However, gains were not retained at 6 months. Both FOG+ and FOG− had a greater reduction of falls after TT + VR compared with TT ( P = .008). NFOG-Q scores did not change after both training modes in the FOG+ group. Conclusions. Treadmill walking (with or without VR) improved postural instability in both FOG+ and FOG−, while controlling for disease severity differences. As found previously, TT + VR reduced falls more than TT alone, even among those with FOG. Interestingly, FOG itself was not helped by training, suggesting that although postural instability, falls and FOG are related, they may be controlled by different mechanisms.

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          Contributors
          (View ORCID Profile)
          (View ORCID Profile)
          Journal
          Neurorehabilitation and Neural Repair
          Neurorehabil Neural Repair
          SAGE Publications
          1545-9683
          1552-6844
          May 2020
          March 23 2020
          May 2020
          : 34
          : 5
          : 440-449
          Affiliations
          [1 ]KU Leuven, Leuven, Belgium
          [2 ]Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
          [3 ]Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
          [4 ]Newcastle University, Newcastle upon Tyne, UK
          [5 ]Radboud University Medical Center, Nijmegen, The Netherlands
          [6 ]University of Genoa, Genoa, Italy
          [7 ]IRCCS Ospedale Policlinico San Martino, Genoa, Italy
          [8 ]University of Sassari, Sassari, Italy
          [9 ]Interuniversity Centre of Bioengineering of the Human Neuromusculoskeletal System, Sassari, Italy
          [10 ]Rush University Medical Center, Chicago, IL, USA
          Article
          10.1177/1545968320912756
          32202203
          60690cae-7a61-4e00-bb6f-771bd74f5787
          © 2020

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