Perceptual simultaneity and its modulation during EMG-triggered motion induction with electrical muscle stimulation

Matsubara, Seito; Wakisaka, Sohei; Aoyama, Kazuo; Seaborn, Katie; Hiyama, Atsushi; İnami, Masahiko

doi:10.1371/journal.pone.0236497

Cited by 8 publications

(3 citation statements)

References 38 publications

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“…While the participants understood clearly the communicated feedback via EMS, they perceived it as a controlling system rather than a guiding one. Previous work has suggested manipulating the EMS signal attributes to overcome this challenge [13,15]. In our work, the participants had the control to adjust attributes (e.g., signal intensity) of the induced EMS signal and the intensity of the vibrotactile feedback.…”

Section: Discussionmentioning

confidence: 99%

EMStriker: Potentials of Enhancing the Training Process of Racket-based Sports via Electrical Muscle Stimulation

Faltaous

Hubert

Karolus

et al. 2022

Sixteenth International Conference on Tangible, Embedded, and Embodied Interaction

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Racket sports offer an enjoyable form of physical activity and are fertile ground for interactive technologies supporting new players. Yet, current research has neglected its potential to support not only active players but also coaches in their training methods. To investigate how interactive technologies can support skill acquisition in training, we designed an Electrical Muscle Stimulation (EMS) system that helps maintain the ready position in crossminton. We compared the system with a vibrotactile solution in a user study, interviewing novice players and experienced coaches about their perception of the system. The system allowed coaches to effectively and immediately guide players to the ready position. An EMS-based feedback system for coaches can potentially reduce delay (physical and cognitive) for trainees, as stated by coaches. Our work contributes insights into designing systems that facilitate learning sports techniques using interactive feedback.

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Section: Discussionmentioning

confidence: 99%

EMStriker: Potentials of Enhancing the Training Process of Racket-based Sports via Electrical Muscle Stimulation

Faltaous

Hubert

Karolus

et al. 2022

Sixteenth International Conference on Tangible, Embedded, and Embodied Interaction

View full text Add to dashboard Cite

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“…Pain, discomfort, and haptic sensation can be reduced by low current. For motion augmentation in daily activities, both reducing the current and the user's intentions for motion must be considered otherwise, the induced movement competes with the intention [36]. The competition between the induced and intentional movement causes pain and discomfort and inhibits movement.…”

Section: ) Transparency Of Motor Interventionmentioning

confidence: 99%

Optimal Motor Point Search Using Mm-Order Electrode Arrays

et al. 2023

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Human-machine integration has been widely implemented in various fields, such as entertainment, human movement assistance, and rehabilitation. This study focuses on electrically-induced muscle contractions. In this technology, it is important to stimulate the optimal position, called the motor point (MP), on the muscle belly to induce the contraction with the lowest current injection. Because the positional relationship between the skin surface and muscles varies according to muscle contraction and body posture, it is difficult to achieve constant and accurate stimulation. Therefore, targeted motor intervention is not possible in several instances. We propose an approach that automatically identifies and stimulates a single precise MP in response to individual differences and postural changes using mm-order electrode arrays in two dimensions (2D). In this study, we develop a system to search for MPs by arranging 2-mm diameter electrodes in a 2D array. Our experiments successfully visualized the MPs in a 2D skin surface, which shifts according to the elbow joint angle change and twisting movement. The results demonstrated the feasibility of 2D electrode arrays. These findings contribute to the design of future devices and an algorithm for electrical muscle stimulation that enables effective muscle contraction.

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“…Several studies in neurorehabilitation show that the combination of ES and task-oriented training is superior to task-oriented training alone (13,(22)(23)(24). However, either EMG-triggered stimulation (25) or cyclical stimulation (26), or somatosensory stimulation (27,28) in combination with the functional taskoriented stimulation can be administered. Furthermore, during the regeneration of functions, the influence of brain-derived neurotropic factor (BDNF) needs to be considered.…”

Section: Introductionmentioning

confidence: 99%

A Prediction Model for Various Treatment Pathways of Upper Extremity in Tetraplegia

Bersch

Krebs

Fridén

2022

Front. Rehabilit. Sci.

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Upper extremity function is essential for the autonomy in patients with cervical spinal cord injuries and consequently a focus of the rehabilitation and treatment efforts. Routinely, an individualized treatment plan is proposed to the patient by an interprofessional team. It dichotomizes into a conservative and a surgical treatment pathway. To select an optimal pathway, it is important to define predictors that substantiate the treatment strategy. Apart from standard assessments (Standards for Neurological Classification of Spinal Cord Injury (ISNCSCI), the manual muscle test (MRC), and lower motoneuron integrity of key actuators for hand function performed by motor point (MP) mapping might serve as a possible predictor. Type of damage (upper motor neuron (UMN) or lower motor neuron (LMN) lesion) influences hand posture and thus treatment strategy as positioning and splinting of fingers, hands, arms, and surgical reconstructive procedures (muscle-tendon or nerve transfers) in choice and timing of intervention. For this purpose, an analysis of a database comprising 220 patients with cervical spinal cord injury is used. It includes ISNCSCI, MRC, and MP mapping of defined muscles at selected time points after injury. The ordinal regression analysis performed indicates that MP and ASIA impairment scale (AIS) act as predictors of muscle strength acquisition. In accordance with the innervation status defined by MP, electrical stimulation (ES) is executed either via nerve or direct muscle stimulation as a supplementary therapy to the traditional occupational and physiotherapeutic treatment methods. Depending on the objective, ES is applied for motor learning, strengthening, or maintenance of muscle contractile properties. By employing ES, hand and arm function can be predicted by MP and AIS and used as the basis for providing an individualized treatment plan.

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Perceptual simultaneity and its modulation during EMG-triggered motion induction with electrical muscle stimulation

Cited by 8 publications

References 38 publications

EMStriker: Potentials of Enhancing the Training Process of Racket-based Sports via Electrical Muscle Stimulation

EMStriker: Potentials of Enhancing the Training Process of Racket-based Sports via Electrical Muscle Stimulation

Optimal Motor Point Search Using Mm-Order Electrode Arrays

A Prediction Model for Various Treatment Pathways of Upper Extremity in Tetraplegia

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