20 Result(s)
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Open AccessEncoding contact size using static and dynamic electrotactile finger stimulation: natural decoding vs. trained cues
Electrotactile stimulation through matrix electrodes is a promising technology to restore high-resolution tactile feedback in extended reality applications. One of the fundamental tactile effects that should b...
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Open AccessBrain computer interface training with motor imagery and functional electrical stimulation for patients with severe upper limb paresis after stroke: a randomized controlled pilot trial
Restorative Brain–Computer Interfaces (BCI) that combine motor imagery with visual feedback and functional electrical stimulation (FES) may offer much-needed treatment alternatives for patients with severely i...
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Open AccessEMG feedback improves gras** of compliant objects using a myoelectric prosthesis
Closing the control loop in myoelectric prostheses by providing artificial somatosensory feedback is recognized as an important goal. However, designing a feedback interface that is effective in realistic cond...
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Open AccessThe impact of walking on the perception of multichannel electrotactile stimulation in individuals with lower-limb amputation and able-bodied participants
One of the drawbacks of lower-limb prostheses is that they do not provide explicit somatosensory feedback to their users. Electrotactile stimulation is an attractive technology to restore such feedback because...
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Open AccessEncoding force modulation in two electrotactile feedback parameters strengthens sensory integration according to maximum likelihood estimation
Bidirectional human–machine interfaces involve commands from the central nervous system to an external device and feedback characterizing device state. Such feedback may be elicited by electrical stimulation o...
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Open AccessA review of user needs to drive the development of lower limb prostheses
The development of bionic legs has seen substantial improvements in the past years but people with lower-limb amputation still suffer from impairments in mobility (e.g., altered balance and gait control) due t...
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Open AccessCombined spatial and frequency encoding for electrotactile feedback of myoelectric signals
Electrotactile stimulation has been commonly used in human–machine interfaces to provide feedback to the user, thereby closing the control loop and improving performance. The encoding approach, which defines t...
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Open AccessReducing the number of EMG electrodes during online hand gesture classification with changing wrist positions
Myoelectric control based on hand gesture classification can be used for effective, contactless human–machine interfacing in general applications (e.g., consumer market) as well as in the clinical context. How...
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Open AccessA compact system for simultaneous stimulation and recording for closed-loop myoelectric control
Despite important advancements in control and mechatronics of myoelectric prostheses, the communication between the user and his/her bionic limb is still unidirectional, as these systems do not provide somatos...
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Open AccessImmersive augmented reality system for the training of pattern classification control with a myoelectric prosthesis
Hand amputation can have a truly debilitating impact on the life of the affected person. A multifunctional myoelectric prosthesis controlled using pattern classification can be used to restore some of the lost...
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Open AccessPsychometric characterization of incidental feedback sources during gras** with a hand prosthesis
A prosthetic system should ideally reinstate the bidirectional communication between the user’s brain and its end effector by restoring both motor and sensory functions lost after an amputation. However, curre...
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Open AccessImproving bimanual interaction with a prosthesis using semi-autonomous control
The loss of a hand is a traumatic experience that substantially compromises an individual’s capability to interact with his environment. The myoelectric prostheses are state-of-the-art (SoA) functional replace...
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Open AccessMyocontrol is closed-loop control: incidental feedback is sufficient for scaling the prosthesis force in routine gras**
Sensory feedback is critical for gras** in able-bodied subjects. Consequently, closing the loop in upper-limb prosthetics by providing artificial sensory feedback to the amputee is expected to improve the pr...
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Open AccessThe clinical relevance of advanced artificial feedback in the control of a multi-functional myoelectric prosthesis
To effectively replace the human hand, a prosthesis should seamlessly respond to user intentions but also convey sensory information back to the user. Restoration of sensory feedback is rated highly by the pro...
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Open AccessTactile feedback is an effective instrument for the training of gras** with a prosthesis at low- and medium-force levels
Gras** is a complex task routinely performed in an anticipatory (feedforward) manner, where sensory feedback is responsible for learning and updating the internal model of grasp dynamics. This study aims at ...
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Open AccessProportional estimation of finger movements from high-density surface electromyography
The importance to restore the hand function following an injury/disease of the nervous system led to the development of novel rehabilitation interventions. Surface electromyography can be used to create a user...
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Open AccessEMG Biofeedback for online predictive control of gras** force in a myoelectric prosthesis
Active hand prostheses controlled using electromyography (EMG) signals have been used for decades to restore the gras** function, lost after an amputation. Although myocontrol is a simple and intuitive inter...
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Open AccessThe impact of the stimulation frequency on closed-loop control with electrotactile feedback
Electrocutaneous stimulation can restore the missing sensory information to prosthetic users. In electrotactile feedback, the information about the prosthesis state is transmitted in the form of pulse trains. ...
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Open AccessTime-division multiplexing for myoelectric closed-loop control using electrotactile feedback
Restoring sensory feedback in myoelectric prostheses is still an open challenge. Closing the loop might lead to a more effective utilization and better integration of these systems into the body scheme of the ...
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Open AccessCognitive vision system for control of dexterous prosthetic hands: Experimental evaluation
Dexterous prosthetic hands that were developed recently, such as SmartHand and i-LIMB, are highly sophisticated; they have individually controllable fingers and the thumb that is able to abduct/adduct. This fl...
