Activation of individual extrinsic thumb muscles and compartments of extrinsic finger muscles

Birdwell, J. Alexander; Hargrove, Levi J.; Kuiken, Todd A.; Weir, Richard F.

doi:10.1152/jn.00748.2012

Cited by 21 publications

(25 citation statements)

References 40 publications

(46 reference statements)

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“…Our previous work demonstrated that intramuscular electrodes residing in these muscles and compartments were capable of measuring and quantifying individual EMG activities [38, 40]. Those findings provided the foundation for this study.…”

Section: Methodsmentioning

confidence: 69%

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Extrinsic Finger and Thumb Muscles Command a Virtual Hand to Allow Individual Finger and Grasp Control

Birdwell

Hargrove

Weir

et al. 2015

IEEE Trans. Biomed. Eng.

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Fine-wire intramuscular electrodes were used to obtain EMG signals from six extrinsic hand muscles associated with the thumb, index, and middle fingers. Subjects’ EMG activity was used to control a virtual three-DOF hand as they conformed the hand to a sequence of hand postures testing two controllers: direct EMG control and pattern recognition control. Subjects tested two conditions using each controller: starting the hand from a pre-defined neutral posture before each new posture and starting the hand from the previous posture in the sequence. Subjects demonstrated their ability to simultaneously, yet individually, move all three DOFs during the direct EMG control trials, however results showed subjects did not often utilize this feature. Performance metrics such as failure rate and completion time showed no significant difference between the two controllers.

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Section: Methodsmentioning

confidence: 69%

“…The three multi-tendon extrinsic finger muscles and the four extrinsic thumb muscles have previously been studied for their ability to activate individually from one another [39, 40]. …”

Section: Introductionmentioning

confidence: 99%

Extrinsic Finger and Thumb Muscles Command a Virtual Hand to Allow Individual Finger and Grasp Control

Birdwell

Hargrove

Weir

et al. 2015

IEEE Trans. Biomed. Eng.

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“…Therefore, it is still unknown whether multiple intramuscular EMGs from extrinsic muscles could be used to directly control a multi-fingered prosthesis. The recent work by Birdwell et al [16], [17] suggested that this is possible. They implemented a three digit control paradigm (i.e., flexion/extension of thumb, index and middle) and tested both proportional speed control and a pattern recognition controller in a virtual posture-matching task, using intramuscular recordings.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the work by Birdwell et al [16], [17], the Flexor Pollicis Longus (FPL), FDP 1 , FDP 2 (i.e., the first two compartments of the Flexor Digitorum Profundis ) and Abductor Pollicis Longus (APL) were targeted with intramuscular electrodes and their EMG proportionally mapped to the flexion of thumb, index, and middle digits and to the abduction of the thumb in the multi-DoF prosthetic hand, respectively. We hypothesized that if the correct muscles were targeted then physiologically appropriate, simultaneous multi-DoF control could be achieved, without explicit training.…”

Section: Introductionmentioning

confidence: 99%

Dexterous Control of a Prosthetic Hand Using Fine-Wire Intramuscular Electrodes in Targeted Extrinsic Muscles

Cipriani

Segil

Birdwell

et al. 2014

IEEE Trans. Neural Syst. Rehabil. Eng.

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Restoring dexterous motor function equivalent to that of the human hand after amputation is one of the major goals in rehabilitation engineering. To achieve this requires the implementation of a effortless human–machine interface that bridges the artificial hand to the sources of volition. Attempts to tap into the neural signals and to use them as control inputs for neuroprostheses range in invasiveness and hierarchical location in the neuromuscular system. Nevertheless today, the primary clinically viable control technique is the electromyogram measured peripherally by surface electrodes. This approach is neither physiologically appropriate nor dexterous because arbitrary finger movements or hand postures cannot be obtained. Here we demonstrate the feasibility of achieving real-time, continuous and simultaneous control of a multi-digit prosthesis directly from forearm muscles signals using intramuscular electrodes on healthy subjects. Subjects contracted physiologically appropriate muscles to control four degrees of freedom of the fingers of a physical robotic hand independently. Subjects described the control as intuitive and showed the ability to drive the hand into 12 postures without explicit training. This is the first study in which peripheral neural correlates were processed in real-time and used to control multiple digits of a physical hand simultaneously in an intuitive and direct way.

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“…A recent study (Cipriani et al, in press) has shown the feasibility of achieving real-time, continuous and simultaneous control of a multi-digit prosthesis, however their study did not involve wrist movements and no comparison was done with surface recordings as the golden standard. The reason for choosing finger movement is founded by previous work (Birdwell et al, 2013) where selectivity in recording from finger compartments has been proven possible.…”

Section: Introductionmentioning

confidence: 99%

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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Activation of individual extrinsic thumb muscles and compartments of extrinsic finger muscles

Abstract: Birdwell JA, Hargrove LJ, Kuiken TA, Weir RF. Activation of individual extrinsic thumb muscles and compartments of extrinsic finger muscles.

Cited by 21 publications

References 40 publications

Extrinsic Finger and Thumb Muscles Command a Virtual Hand to Allow Individual Finger and Grasp Control

Extrinsic Finger and Thumb Muscles Command a Virtual Hand to Allow Individual Finger and Grasp Control

Dexterous Control of a Prosthetic Hand Using Fine-Wire Intramuscular Electrodes in Targeted Extrinsic Muscles

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

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