NDLI: Gait initiation evaluation after deep brain stimulation for Parkinson's disease: A 7-year follow-up

Content Provider	IEEE Xplore Digital Library
Author	Muniz, A.M.S. Liu, W. Liu, H. Lyons, K.E. Pahwa, R. Nadal, J.
Copyright Year	2010
Description	Author affiliation: Biomedical Engineering Program, Federal University of Rio de Janeiro, Brazil (Nadal, J.) \|\| Department of Post-graduation, Physical Education Collage of Brazilian Army, Rio de Janeiro, BRAZIL (Muniz, A.M.S.) \|\| Parkinson's Disease and Movement Disorder Center, Department of Neurology, University of Kansas Medical Center, USA (Lyons, K.E.; Pahwa, R.) \|\| Department of Physical Therapy and Rehabilitation Sciences, University of Kansas Medical Center, USA (Liu, W.; Liu, H.)
Abstract	This study evaluated the long-term effects of deep brain stimulation of the subthalamic nucleus (DBS-STN) on gait initiation. Six Parkinson's disease (PD) patients who had undergone DBS-STN and 31 control subjects were evaluated. PD subjects were assessed at two different time periods: 11.3 ± 10.3 (P1) and 78.9 ± 10.6 (P2) months after surgery. Subjects under stimulation were tested in two conditions: without medication and with medication. Principal components (PC) analysis was separately applied on vertical, anterior-posterior and medial-lateral ground reaction force (GRF) from gait initiation, during the anticipatory postural adjustment (APA) phase. Three PC scores were chosen by the scree test for each GRF component. The higher loading factors pointed to major differences between controls and PD patients on maximum APA amplitude for vertical and anterior-posterior GRF. Friedman test showed a significant difference in standard distance among conditions (P = 0.006), with the post-hoc test recognizing differences only between P1 and P2 in the medication-on condition. All distances increased in the follow-up evaluation (P2), when considering the same medication condition, indicating a worsening in gait initiation after 7 years of follow-up.
Starting Page	3650
Ending Page	3653
File Size	401308
Page Count	4
File Format	PDF
ISBN	9781424441235
ISSN	1557170X
DOI	10.1109/IEMBS.2010.5627419
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-08-31
Publisher Place	Argentina
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Parkinson's disease Loading Foot PD control Force Principal component analysis Medical diagnostic imaging
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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