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

This study aims to address technical and computational issues regarding the use of accelerometry to assess dynamic gait stability in individuals with subacute stroke. The results provide informative outcomes correlated with clinical scores and confirm the suitability of accelerometric techniques in assessing upper body dynamic stability during walking in patients with subacute stroke.

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

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  1. Assessment of upper-body dynamic stability during walking in patients with subacute stroke Marco Iosa, PhD; Augusto Fusco, MD; Giovanni Morone, MD; Luca Pratesi, MD; Paola Coiro, MD; Vincenzo Venturiero, MD, PhD; Domenico De Angelis, MD; Maura Bragoni, MD, PhD; Stefano Paolucci, MD

  2. Aim • Address technical and computational issues regarding use of accelerometry to assess dynamic gait stability in people with stroke. • Relevance • Increasing interest in clinical use of accelerometry to quantify movement patterns during walking in suitable, simple manner. • Parameters extracted by accelerometric signals must be adapted to clinical population.

  3. Methods • 3 groups (n = 15 each): • Stroke (low functional group [LFG]) • Age-matched nondisabled adults (medium functional group [MFG]) • Nondisabled young adults (high functional group [HFG]). • Mobility assessed with Rivermead Mobility Index, Barthel Index,Functional Ambulation Classification. • Subjects completed 10 m walking test while wearing elastic belt with inertial sensor device containing triaxial accelerometer to measure accelerations along the 3 body axes. • Root Mean Square (RMS) of accelerations was computed

  4. Results • Small (<2%) but significant differences in RMS obtained using 2 most common computational approaches. • Intersubject dependency of acceleration RMS by selected walking speed was specific for each group and body axis. • Analysis of ratios between these accelerations provided informative outcomes correlated with clinical scores and not affected by walking speed.

  5. Results (a) Acceleration RMS. (b) Harmonic ratio for HFG, MFG, and LFG along craniocaudal (CC), laterolateral (LL), and antero-posterior (AP) body axes.

  6. Conclusions • Our findings support hypothesis that upper-body dynamic stability can be accurately assessed from upper-body accelerations in patients with stroke. • For patients with subacute stroke, suitability of accelerometric techniques to provide informative results about their upper-body dynamic stability during walking was confirmed.

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