Implantation of Micro-Circuits for Myo-Electric Control of Prostheses

Herberts, Peter; Kadefors, Roland; Kaiser, É.; Petersén, I.

doi:10.1302/0301-620x.50b4.780

Cited by 20 publications

(10 citation statements)

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“…The idea of recording the electromyogram (EMG) invasively for control purposes was first attempted more than four decades ago, using electrodes with a telemetry system implanted in two able-bodied and two amputee subjects (Herberts et al, 1968). The electrodes were implanted for durations between four and fifteen months.…”

Section: Introductionmentioning

confidence: 99%

“…No details were provided concerning test procedures on amputees. The possibility of obtaining proportional control of powered prostheses with the aid of implanted circuits over long periods of time was reported (Herberts et al, 1968). Proportional control means that the velocity of a selected prosthesis function is dictated proportionally by the level of myoelectric activity (Williams, 1990).…”

Section: Introductionmentioning

confidence: 99%

“…The early experiments (Herberts et al, 1968;Tucker and Peteleski, 1977;Stein et al, 1980) reported that control was possible, but provided no systematic quantification of usability. Furthermore their primary purposes were to obtain isolated signals for direct control (Herberts et al, 1973).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On the usability of intramuscular EMG for prosthetic control: A Fitts’ Law approach

Kamavuako¹,

Scheme²,

Englehart³

2014

Journal of Electromyography and Kinesiology

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On the usability of intramuscular EMG for prosthetic control: A Fitts’ Law approach

Kamavuako¹,

Scheme²,

Englehart³

2014

Journal of Electromyography and Kinesiology

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“…Despite significant progress in the field of upper limb prosthetics, robotic devices capable of restoring the dexterity and perception of lost biological arms remain elusive. It has been several decades since researchers started exploring invasive solutions to establish electrical connection with the peripheral nervous system of amputees 1 , 2 . Invasively interfacing muscles that survived amputation has been shown to provide rudimental but reliable open-loop control of prosthetic hands in activities of daily living 3 – 5 .…”

Section: Introductionmentioning

confidence: 99%

Neural feedback strategies to improve grasping coordination in neuromusculoskeletal prostheses

Mastinu

Engels

Clemente

et al. 2020

Sci Rep

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Conventional prosthetic arms suffer from poor controllability and lack of sensory feedback. Owing to the absence of tactile sensory information, prosthetic users must rely on incidental visual and auditory cues. In this study, we investigated the effect of providing tactile perception on motor coordination during routine grasping and grasping under uncertainty. Three transhumeral amputees were implanted with an osseointegrated percutaneous implant system for direct skeletal attachment and bidirectional communication with implanted neuromuscular electrodes. This neuromusculoskeletal prosthesis is a novel concept of artificial limb replacement that allows to extract control signals from electrodes implanted on viable muscle tissue, and to stimulate severed afferent nerve fibers to provide somatosensory feedback. Subjects received tactile feedback using three biologically inspired stimulation paradigms while performing a pick and lift test. The grasped object was instrumented to record grasping and lifting forces and its weight was either constant or unexpectedly changed in between trials. The results were also compared to the no-feedback control condition. Our findings confirm, in line with the neuroscientific literature, that somatosensory feedback is necessary for motor coordination during grasping. Our results also indicate that feedback is more relevant under uncertainty, and its effectiveness can be influenced by the selected neuromodulation paradigm and arguably also the prior experience of the prosthesis user.

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“…Herberts et al were the first to implant intramuscular electrodes to estimate the contraction level of muscles by applying different loads on hand joints [1]. A few years later, Tucker and Peteleski implanted an intramuscular electrode into the functioning forearm muscle of a subject with congenital limb deficiency.…”

Section: Introductionmentioning

confidence: 99%

A Multiday Evaluation of Real-Time Intramuscular EMG Usability with ANN

Waris

Rehman

Niazi

et al. 2020

Sensors

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Recent developments in implantable technology, such as high-density recordings, wireless transmission of signals to a prosthetic hand, may pave the way for intramuscular electromyography (iEMG)-based myoelectric control in the future. This study aimed to investigate the real-time control performance of iEMG over time. A novel protocol was developed to quantify the robustness of the real-time performance parameters. Intramuscular wires were used to record EMG signals, which were kept inside the muscles for five consecutive days. Tests were performed on multiple days using Fitts’ law. Throughput, completion rate, path efficiency and overshoot were evaluated as performance metrics using three train/test strategies. Each train/test scheme was categorized on the basis of data quantity and the time difference between training and testing data. An artificial neural network (ANN) classifier was trained and tested on (i) data from the same day (WDT), (ii) data collected from the previous day and tested on present-day (BDT) and (iii) trained on all previous days including the present day and tested on present-day (CDT). It was found that the completion rate (91.6 ± 3.6%) of CDT was significantly better (p < 0.01) than BDT (74.02 ± 5.8%) and WDT (88.16 ± 3.6%). For BDT, on average, the first session of each day was significantly better (p < 0.01) than the second and third sessions for completion rate (77.9 ± 14.0%) and path efficiency (88.9 ± 16.9%). Subjects demonstrated the ability to achieve targets successfully with wire electrodes. Results also suggest that time variations in the iEMG signal can be catered by concatenating the data over several days. This scheme can be helpful in attaining stable and robust performance.

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Implantation of Micro-Circuits for Myo-Electric Control of Prostheses

Abstract: In Some Topics on Myo-electric Control of Orthoticprosthetic Systems.

Cited by 20 publications

References 0 publications

On the usability of intramuscular EMG for prosthetic control: A Fitts’ Law approach

On the usability of intramuscular EMG for prosthetic control: A Fitts’ Law approach

Neural feedback strategies to improve grasping coordination in neuromusculoskeletal prostheses

A Multiday Evaluation of Real-Time Intramuscular EMG Usability with ANN

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