The Effect of Frequency Change on Elbow Joint Motion Change under Loaded Conditions for Upper-Limb Perception-Assist

AbstractThe actuation system of a powered upper limb orthosis is studied in the work. To create natural safety in the mutual “man-robot” interaction, an actuation system based on pneumatic artificial muscles (PAM) is selected. Experimentally obtained force/contraction diagrams for bundles, consisting of different number of muscles are shown in the paper. The pooling force and the stiffness of the pneumatic actuators is assessed as a function of the number of muscles in the bundle and the supply pressure. Joint motion and torque is achieved by antagonistic actions through pulleys, driven by bundles of pneumatic muscles. Joint stiffness and joint torques are determined on condition of a power balance, as a function of the joint position, pressure, number of muscles and muscles

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The Significance of the Mechanical Factors Acting on the Elbow Joint for the Carrying Capacity of the Flexed Upper Limb

Biomechanics of the Locomotor Apparatus ◽

10.1007/978-3-642-67138-8_10 ◽

1980 ◽

pp. 249-298

Author(s):

Friedrich Pauwels

Keyword(s):

Upper Limb ◽

Carrying Capacity ◽

Elbow Joint ◽

Mechanical Factors

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Modern Technologies of Medical Rehabilitation of Upper Limb Injury in Children

Journal of restorative medicine and rehabilitation ◽

10.38025/2078-1962-2020-98-4-42-47 ◽

2020 ◽

Vol 98 (4) ◽

pp. 42-47

Author(s):

M.A. Khan ◽

E.L. Vakhova ◽

D.Yu. Vybornov ◽

N.I. Tarasov ◽

Е.О. Pochkin ◽

...

Keyword(s):

Upper Limb ◽

Elbow Joint ◽

Rehabilitation Program ◽

Medical Rehabilitation ◽

Entire Period ◽

Limb Injury ◽

Rehabilitation Programs ◽

Wide Range ◽

Limb Trauma ◽

Rehabilitation Measures

The relevance of the problem of children with upper limb trauma medical rehabilitation is determined by the high frequency elbow joint fractures; the risk of complications development, disabilityc of the patient. A comprehensive medical rehabilitation program assumes a personalized approach and a differentiated prescription of physical factors, depending on the time period of rehabilitation. Early physical rehabilitation is a key link in the complete recovery of the function of a patient’s limb with damage to the elbow joint. The purpose of this work is to analyze literature and summarize the results of our own research to determine the optimal approaches and methods for medical rehabilitation of children with upper limb injury. The medical rehabilitation program includes various methods of kinesiotherapy, robotic mechanotherapy, massage, a wide range of apparatus physiotherapy to improve the trophism of the periarticular tissues, to maintain mobility in joints free from immobilization; gain of the full range of motion in the damaged joint; normalizing tone and strengthening the muscles of the upper limb. Medical rehabilitation of children with elbow joint injury is carried out from the earliest stage, in stationary conditions, during the period of immobilization. The rehabilitation measures continue in outpatient and polyclinic conditions, during the entire period of immobilization (2–4 weeks) and then in the post-immobilization period until the limb function is fully restored. It is necessary to monitor the main indicators of the function of the upper limb during the entire period of rehabilitation to assess the effectiveness of rehabilitation measures, objectify the course of the rehabilitation process and the continuity of rehabilitation programs. Definition of the tasks of medical rehabilitation, differentiated for each stage; the choice of modern, pathogenetically grounded rehabilitation technologies with an assessment of their effectiveness contribute to a significant increase in the effectiveness of comprehensive rehabilitation programs for children with upper limb trauma.

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EMG-based Continuous Prediction of the Upper Limb Elbow Joint Angle Using GRNN

2019 IEEE International Conference on Mechatronics and Automation (ICMA) ◽

10.1109/icma.2019.8816401 ◽

2019 ◽

Cited By ~ 1

Author(s):

Shuxiang Guo ◽

Ziyi Yang ◽

Yi Liu

Keyword(s):

Upper Limb ◽

Elbow Joint ◽

Joint Angle

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Control System for an Elbow Joint Motion Simulator

Volume 9: Mechanical Systems and Control, Parts A, B, and C ◽

10.1115/imece2007-42806 ◽

2007 ◽

Author(s):

Patrick J. Schimoler ◽

Jeffrey S. Vipperman ◽

Laurel Kuxhaus ◽

Angela M. Flamm ◽

Daniel D. Budny ◽

...

Keyword(s):

Control System ◽

Elbow Joint ◽

Degrees Of Freedom ◽

Biceps Brachii ◽

Control Algorithms ◽

Joint Motion ◽

Motion Simulator ◽

Co Activation ◽

Flexion Extension ◽

The Many

The many muscles crossing the elbow joint allow for its motions to be created from different combinations of muscular activations. Muscles are strictly contractile elements and the joints they surround rely on varying loads from opposing antagonists for stability and movement. In designing a control system to actuate an elbow in a realistic manner, unidirectional, tendon-like actuation and muscle co-activation must be considered in order to successfully control the elbow’s two degrees of freedom. Also important is the multifunctionality of certain muscles, such as the biceps brachii, which create moments impacting both degrees of freedom: flexion / extension and pronation / supination. This paper seeks to develop and implement control algorithms on an elbow joint motion simulator that actuates cadaveric elbow specimens via four major muscles that cross the elbow joint. The algorithms were validated using an anatomically-realistic mechanical elbow. Clinically-meaningful results, such as the evaluation of radial head implants, can only be obtained under repeatable, realistic conditions; therefore, physiologic motions must be created by the application of appropriate loads. This is achieved by including load control on the muscles’ actuators as well as displacement control on both flexion / extension and supination / pronation.

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