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M. Puchinger, N. Babu Rajendra Kurup, T. Keck, J. Zajc, M. Russold, M. Gföhler:
"The RETRAINER Light-Weight Arm Exoskeleton: Effect of Adjustable Gravity Compensation on Muscle Activations and Forces";
Poster: 2018 7th IEEE International Conference on Biomedical Robotics and Biomechatronics (BIOROB), Enschede; 2018-08-26 - 2018-08-29; in: "2018 7th IEEE International Conference on Biomedical Robotics and Biomechatronics (Biorob)", (2018), 6 pages.

the recovery of voluntary arm movements is one
of the most important goals during stroke rehabilitation in
order to avoid long-term disability in activities of daily living.
Support against gravity in order to reduce flexion synergy is
reported as an effective strategy to enable upper extremity
rehabilitation. In this study, the reduction of muscle activities
and muscle forces with the gravity compensated RETRAINER
upper limb exoskeleton were analyzed carrying out defined
movements with healthy subjects. The EMG signals of the main
active muscles as well as the kinematics of different defined
motions were captured and compared. The joint kinematics
and the joint moments were computationally determined using
a 3D musculoskeletal model. The effectiveness of the upper
limb gravity compensation could be shown in both mean values
of EMG signals and resulting muscle forces, indicating that this
compact and lightweight arm exoskeleton can serve as a
powerful tool to support the rehabilitation process.

exoskeleton, upper limb, rehabilitation, Exoskelett, Rehabilitation

https://publik.tuwien.ac.at/files/publik_274324.pdf