The effects of powered ankle-foot orthoses on joint kinematics and muscle activation during walking in individuals with incomplete spinal cord injury

Journal of Neuroengineering and Rehabilitation
Gregory S SawickiDaniel P Ferris

Abstract

Powered lower limb orthoses could reduce therapist labor during gait rehabilitation after neurological injury. However, it is not clear how patients respond to powered assistance during stepping. Patients might allow the orthoses to drive the movement pattern and reduce their muscle activation. The goal of this study was to test the effects of robotic assistance in subjects with incomplete spinal cord injury using pneumatically powered ankle-foot orthoses. Five individuals with chronic incomplete spinal cord injury (ASIA C-D) participated in the study. Each subject was fitted with bilateral ankle-foot orthoses equipped with artificial pneumatic muscles to power ankle plantar flexion. Subjects walked on a treadmill with partial bodyweight support at four speeds (0.36, 0.54, 0.72 and 0.89 m/s) under three conditions: without wearing orthoses, wearing orthoses unpowered (passively), and wearing orthoses activated under pushbutton control by a physical therapist. Subjects also attempted a fourth condition wearing orthoses activated under pushbutton control by them. We measured joint angles, electromyography, and orthoses torque assistance. A therapist quickly learned to activate the artificial pneumatic muscles using the pushbutton...Continue Reading

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Citations

Nov 30, 2014·Journal of Neuroengineering and Rehabilitation·Juan FangKenneth J Hunt
May 9, 2015·IEEE Transactions on Bio-medical Engineering·Kamran ShamaeiAaron M Dollar
Apr 19, 2015·Journal of Neuroengineering and Rehabilitation·Kota Z TakahashiGregory S Sawicki
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Jun 25, 2009·Journal of Neuroengineering and Rehabilitation·Gregory S Sawicki, Daniel P Ferris
Jul 28, 2010·Journal of Neuroengineering and Rehabilitation·Pei-Chun KaoDaniel P Ferris
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Jun 17, 2009·Journal of Neuroengineering and Rehabilitation·Robin ChinJoel N Gilmer

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