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Application of EMG in ergonomics
Published in Kumar Shrawan, Mital Anil, Electromyography in Ergonomics, 2017
In addition, although in the developed countries, poliomyelitis is an historical oddity, it is still a major health problem in Third World countries. The presence of a late complication of poliomyelitis, post polio syndrome, has attracted a great deal of attention because of its symptomatology which is reminiscent of the weakness and paralysis that was present in the initial poliomyelitis episode. EMG needle electrode studies have been able to identify methods of differentiating between weakness in post-polio syndrome caused by incomplete recovery from acute polio and weakness caused by the changes in the motor units that are known to be the cause of new weaknesses appearing 25-40 years after the acute episode (Feldman, 1989a).
Collective making: Co-designing 3D printed assistive technologies with occupational therapists, designers, and end-users
Published in Assistive Technology, 2023
Leila Aflatoony, Su Jin Lee, Jon Sanford
Nine individuals, including four OTs (with four to 26 years of experience), four industrial designers (three senior undergraduates and one recent graduate), and one end-user with a mobility disability, participated in the study. The end-user is in her 70s, contracted polio as a child, and utilizes a wheelchair full time. In addition to post-polio syndrome, she experiences age-related mobility decline, which mainly affects the sensation and strength in her hands. She experiences severe pain when engaging in fine motor activities that involve the extension of her hands (e.g., wrist extension during writing). For example, she has no issues holding or grabbing a pen for a short time, but she cannot hold on to or maintain a firm grasp on a pen without pain over an extended period. As a result, she voiced a desire for a design solution that would enable her to hold and use a writing utensil for a longer time without pain. She actively attends continuing education classes and engages in extensive class note-taking. This effort is fundamental to her success while studying but is currently difficult for her to accomplish. Each participant was compensated $100-160 (varied due to different workshop attendance rates) to participate in the workshops. Study procedures received ethics approval under an exempt review.
Experimental and numerical diagnosis of fatigue foot using convolutional neural network
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2021
Abbas Sharifi, Mohsen Ahmadi, Mohammad Amin Mehni, Saeid Jafarzadeh Ghoushchi, Yaghoub Pourasad
The principle of muscle fatigue is an essential criterion in the physiotherapy of patients and injured athletes. Knowledge of muscle fatigue mechanisms is essential in designing a workout program that should be particularly relevant to injury, brain damage, spinal cord injury, and patients. Therapist rheumatology is necessary to consider the issue of muscle fatigue concerning patients with Multiple Sclerosis (MS), Guillain Barrett (GB), or post-polio syndrome (Appel et al. 2007). Fatigue of the muscle is a state in which the muscle can contract and minimize the force produced. As muscle and functionality differ from person to person, the muscle fatigue threshold cannot be described as a simple function of time and range of muscle loading (Botterman et al. 1978). Surface Electromyography is one of the methods used to evaluate local muscle fatigue. Our suggestion is to review and measure patients' foot pressure and discover the relationship between foot pressure and individual fatigue. Fatigue measurement and quantification have been carried out, and numerous studies have been done (Cifrek et al. 2009). Today, the issue of fatigue and its ergonomics in the industrial world is seriously considered. It is crucial to overcome the defects of the previous strategies and minimize the calculation error. For the indication of muscular fatigue, it must be considered that the EMG amplitude and the EMG spectrum depend not only upon the fatigue state but also upon the produced muscle force (Luttmann et al. 2000).
Evaluation of the effectiveness of a novel gait trainer in increasing the functionality of individuals with motor impairment: A case series
Published in Assistive Technology, 2019
Eitan Raveh, Isabella Schwartz, Naama Karniel, Sigal Portnoy
Five ambulatory adults with four different conditions: Post-polio syndrome (PPS), multiple sclerosis (MS), Cerebral Palsy (CP), and spinal cord injury (SCI) were recruited for the study. These pathologies were chosen since they are common conditions of non-ambulatory individuals with indication for gait trainers. One of the two subjects with SCI dropped out of the study since her house surroundings included several indoor stairs, so the trainer use was inapplicable for her. The inclusion criteria were ambulatory individuals, ages of 18 and above, cognitive and cooperative ability to follow simple instructions, independently capable to understand an informed consent form, and weight below 100 kg. We chose ambulatory individuals that can walk with walking aids in order to test whether this new assistive device would provide greater benefits than their current walking aids. We expected improvement in the overall functionality of each subject, due to the special characteristics of the gait trainer (i.e., sit-to-stand and stand-to-sit assistance), as well as a load bearing mechanism that allows the user to lift the hands from the rail, freeing them for functional activities. The personal characteristics of the four subjects are detailed in Table 1. The study was approved by the hospital Helsinki committee (Approval No. 0254–13-HMO).