Muscle activity during maximal isometric forearm rotation using a power grip

Bader, Joseph Scott; Boland, Michael R.; Greybe, Desney; Nitz, Arthur J.; Uhl, Timothy L.; Pienkowski, David

doi:10.1016/j.jbiomech.2017.12.011

Cited by 6 publications

(4 citation statements)

References 51 publications

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“…In a previous study, a radio-controlled model vehicle was successfully steered to the right by supinating the right forearm (Takizawa et al , 2009). Because the biceps brachii is one of the most active muscles when the forearm supinates with the elbow flexed at 90°, the sEMG of the biceps brachii was selected to readily control the steering wheel angle (SWA) of the simulated vehicle (Bader et al , 2018).…”

Section: Design Of the Steering Assistance Systemmentioning

confidence: 99%

A surface electromyography controlled steering assistance interface

Nacpil

Zheng

Kaizuka

et al. 2019

JICV

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Purpose Two-handed automobile steering at low vehicle speeds may lead to reduced steering ability at large steering wheel angles and shoulder injury at high steering wheel rates (SWRs). As a first step toward solving these problems, this study aims, firstly, to design a surface electromyography (sEMG) controlled steering assistance interface that enables hands-free steering wheel rotation and, secondly, to validate the effect of this rotation on path-following accuracy. Design/methodology/approach A total of 24 drivers used biceps brachii sEMG signals to control the steering assistance interface at a maximized SWR in three driving simulator scenarios: U-turn, 90º turn and 45º turn. For comparison, the scenarios were repeated with a slower SWR and a game steering wheel in place of the steering assistance interface. The path-following accuracy of the steering assistance interface would be validated if it was at least comparable to that of the game steering wheel. Findings Overall, the steering assistance interface with a maximized SWR was comparable to a game steering wheel. For the U-turn, 90º turn and 45º turn, the sEMG-based human–machine interface (HMI) had median lateral errors of 0.55, 0.3 and 0.2 m, respectively, whereas the game steering wheel, respectively, had median lateral errors of 0.7, 0.4 and 0.3 m. The higher accuracy of the sEMG-based HMI was statistically significant in the case of the U-turn. Originality/value Although production automobiles do not use sEMG-based HMIs, and few studies have proposed sEMG controlled steering, the results of the current study warrant further development of a sEMG-based HMI for an actual automobile.

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Section: Design Of the Steering Assistance Systemmentioning

confidence: 99%

A surface electromyography controlled steering assistance interface

Nacpil

Zheng

Kaizuka

et al. 2019

JICV

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“…Supinator is a deep muscle located at the proximal end of the forearm, covered by extensor carpi radialis longus, extensor carpi radialis brevis, brachioradialis muscle and extensor indicis muscle. It is one of the primary muscles responsible for forearm supination 19 , 20 . The reason for supinator muscle atrophy, fibrosis or absence might lead to dysfunctions 8 , 14 , resulting in forearm pronation that directly affects the activities of daily living (ADL) 10 , 21 .…”

Section: Introductionmentioning

confidence: 99%

An anatomical classification of congenital proximal radioulnar synostosis based on retrospective MRI measurement combined with radiography

Chen

Wang

et al. 2022

Sci Rep

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Existed classifications of congenital proximal radioulnar synostosis (PRUS) mainly focus on osseous changes and do not cover all types of congenital PRUS, ignoring the role and developing status of the supinator. This study aims to explore the correlation between supinator development and radiographic deformity of congenital PRUS. Pediatric patients diagnosed with congenital PRUS in two pediatric Orthopedic centers were evaluated retrospectively. MRI and radiographic images of their bilateral forearms (including normal ones) were collected. The area of supinator, extensor carpi radialis longus (ECRL), extensor carpi radialis brevis (ECRB), brachioradialis (BRAR) muscle and extensor indicis (EI) muscle were measured on each forearm. The ratios of these muscles were calculated and regarded as an indicator of the developing status of supinator muscle. Twenty-seven congenital PRUS forearms of 16 patients (average 3.45 years) were included. A new MRI & X-ray classification system was proposed to cover all types of radiographic deformity and provide a comprehensive description of supinator development. This study revealed the relation between MRI measured supinator volume and radiographic deformity of congenital PRUS. Supinator muscles were observed in all congenital PRUS cases. A novel classification was proposed, providing a more comprehensive understanding of congenital PRUS.

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“…After the participant completed the informed consent process, the two electrodes were placed on the bicep and pronator teres, which are known to correlate with supination and pronation, respectively ( Bader et al, 2018 ). The ventral (supinator) pair of actuators were arranged alongside and/or slightly on top of the low-profile surface EMG electrode located over the pronator teres.…”

Section: Methodsmentioning

confidence: 99%

Assisting Forearm Function in Children With Movement Disorders via A Soft Wearable Robot With Equilibrium-Point Control

Realmuto

Sanger²

2022

Front. Robot. AI

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Wearable robots are envisioned to amplify the independence of people with movement impairments by providing daily physical assistance. For portable, comfortable, and safe devices, soft pneumatic-based robots are emerging as a potential solution. However, due to the inherent complexities, including compliance and nonlinear mechanical behavior, feedback control for facilitating human–robot interaction remains a challenge. Herein, we present the design, fabrication, and control architecture of a soft wearable robot that assists in supination and pronation of the forearm. The soft wearable robot integrates an antagonistic pair of pneumatic-based helical actuators to provide active pronation and supination torques. Our main contribution is a bio-inspired equilibrium-point control scheme for integrating proprioceptive feedback and exteroceptive input (e.g., the user’s muscle activation signals) directly with the on/off valve behavior of the soft pneumatic actuators. The proposed human–robot controller is directly inspired by the equilibrium-point hypothesis of motor control, which suggests that voluntary movements arise through shifts in the equilibrium state of the antagonistic muscle pair spanning a joint. We hypothesized that the proposed method would reduce the required effort during dynamic manipulation without affecting the error. In order to evaluate our proposed method, we recruited seven pediatric participants with movement disorders to perform two dynamic interaction tasks with a haptic manipulandum. Each task required the participant to track a sinusoidal trajectory while the haptic manipulandum behaved as a Spring-Dominate system or Inertia-Dominate system. Our results reveal that the soft wearable robot, when active, reduced user effort on average by 14%. This work demonstrates the practical implementation of an equilibrium-point volitional controller for wearable robots and provides a foundational path toward versatile, low-cost, and soft wearable robots.

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Muscle activity during maximal isometric forearm rotation using a power grip

Cited by 6 publications

References 51 publications

A surface electromyography controlled steering assistance interface

A surface electromyography controlled steering assistance interface

An anatomical classification of congenital proximal radioulnar synostosis based on retrospective MRI measurement combined with radiography

Assisting Forearm Function in Children With Movement Disorders via A Soft Wearable Robot With Equilibrium-Point Control

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