Journal of Rehabilitation Research & Development (JRRD)

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Volume 49 Number 3, 2012
   Pages 439 — 450

Abstract — Assessment of upper-body dynamic stability during walking in patients with subacute stroke

Marco Iosa, PhD;1* Augusto Fusco, MD;1 Giovanni Morone, MD;1 Luca Pratesi, MD;2 Paola Coiro, MD;2 Vincenzo Venturiero, MD, PhD;2 Domenico De Angelis, MD;2 Maura Bragoni, MD, PhD;2 Stefano Paolucci, MD1–2

1Clinical Laboratory of Experimental Neurorehabilitation, Fondazione Santa Lucia IRCCS (Santa Lucia Foundation, Scientific Institute for Research Hospitalization and Health Care), Rome, Italy; 2Operative Unit F, Fondazione Santa Lucia IRCCS, Rome, Italy

Abstract–The analysis of upper-body acceleration is a promising and simple technique to quantitatively assess dynamic gait stability. However, this method has rarely been used for people with stroke, probably because of some technical issues still not addressed. We evaluated the root-mean-square (RMS) and harmonic ratio of trunk accelerations for a group of 15 inpatients with subacute stroke who were able to walk (61.4 +/– 14.9 yr) and compared them with those of an age-matched group of nondisabled subjects (65.1 +/– 8.8 yr) and those of a highly functional group of young nondisabled subjects (29.0 +/– 5.0 yr). Small (<2%) but significant (p < 0.03) differences were found in RMS values obtained by applying the two most common computational approaches: (1) averaging among individual-stride RMS values and (2) computing the RMS value over the entire walking trial without stride partitioning. We found that the intersubject dependency of acceleration RMS values by selected walking speed was specific for each group and for each of the three body axes. The analysis of ratios between these three accelerations provided informative outcomes correlated with clinical scores and not affected by walking speed. Our findings are an important step toward transferring accelerometry from human movement analysis laboratories to clinical settings.

Key words: accelerometry, ambulation, biomechanics, dynamic balance, gait, mobility, movement analysis, rehabilitation, stroke, walking speed.

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Last Reviewed or Updated  Thursday, April 26, 2012 11:56 AM

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