Adding vibrotactile feedback to a myoelectric-controlled hand improves performance when online visual feedback is disturbed

Raveh, Eitan; Portnoy, Sigal; Friedman, Jason

doi:10.1016/j.humov.2018.01.008

Cited by 27 publications

(16 citation statements)

References 24 publications

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“…So, just because a user can use a hand prosthesis does not mean that the hand prosthesis is intuitively useable. From technologies that provide vibrotactile feedback [59] to hands that can actually 'see' for themselves [60], each will increase or lessen the cognitive resources needed to interact with the world. It is this user-prosthesis-world interaction that needs examining in future research, which to be effective, will depend on significant collaborations between applied psychologists, prosthesis engineers, occupational therapists and prosthesis users themselves.…”

Section: Discussionmentioning

confidence: 99%

Visual attention, EEG alpha power and T7-Fz connectivity are implicated in prosthetic hand control and can be optimized through gaze training

Parr

Vine

Wilson

et al. 2019

J NeuroEngineering Rehabil

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Background: Prosthetic hands impose a high cognitive burden on the user that often results in fatigue, frustration and prosthesis rejection. However, efforts to directly measure this burden are sparse and little is known about the mechanisms behind it. There is also a lack of evidence-based training interventions designed to improve prosthesis hand control and reduce the mental effort required to use them. In two experiments, we provide the first direct evaluation of this cognitive burden using measurements of EEG and eye-tracking (Experiment 1), and then explore how a novel visuomotor intervention (gaze training; GT) might alleviate it (Experiment 2). Methods: In Experiment 1, able-bodied participants (n = 20) lifted and moved a jar, first using their anatomical hand and then using a myoelectric prosthetic hand simulator. In experiment 2, a GT group (n = 12) and a movement training (MT) group (n = 12) trained with the prosthetic hand simulator over three one hour sessions in a picking up coins task, before returning for retention, delayed retention and transfer tests. The GT group received instruction regarding how to use their eyes effectively, while the MT group received movement-related instruction typical in rehabilitation. Results: Experiment 1 revealed that when using the prosthetic hand, participants performed worse, exhibited spatial and temporal disruptions to visual attention, and exhibited a global decrease in EEG alpha power (8-12 Hz), suggesting increased cognitive effort. Experiment 2 showed that GT was the more effective method for expediting prosthesis learning, optimising visual attention, and lowering conscious controlas indexed by reduced T7-Fz connectivity. Whilst the MT group improved performance, they did not reduce hand-focused visual attention and showed increased conscious movement control. The superior benefits of GT transferred to a more complex tea-making task. Conclusions: These experiments quantify the visual and cortical mechanisms relating to the cognitive burden experienced during prosthetic hand control. They also evidence the efficacy of a GT intervention that alleviated this burden and promoted better learning and transfer, compared to typical rehabilitation instructions. These findings have theoretical and practical implications for prosthesis rehabilitation, the development of emerging prosthesis technologies and for the general understanding of human-tool interactions.

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Section: Discussionmentioning

confidence: 99%

Visual attention, EEG alpha power and T7-Fz connectivity are implicated in prosthetic hand control and can be optimized through gaze training

Parr

Vine

Wilson

et al. 2019

J NeuroEngineering Rehabil

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“…One priority in prosthetic design that is desirable among arm amputees is how to provide the user with sensory feedback (2,3,(5)(6)(7)(8)(9). It has been shown that sensory feedback improves grasping control and performance with myoelectric hand prostheses in inexperienced users (10,11). Both invasive and non-invasive sensory feedback systems are under development (2,9,(12)(13)(14)(15)(16)(17)(18)(19).…”

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confidence: 99%

Touch on predefined areas on the forearm can be associated with specific fingers: Towards a new principle for sensory feedback in hand prostheses

Wijk¹,

Svensson²,

Antfolk³

et al. 2019

J Rehabil Med

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A drawback of currently available hand prostheses is the lack of sensory feedback. Some amputees experience a feeling of touch of the amputated hand when the residual limb is touched. This kind of referred sensation is called "phantom hand map". However, not all amputees experience "phantom hand map". Therefore, we examined whether touch on predefined areas on the forearm can be associated with specific fingers in individuals with an intact arm, using a tactile display during a 5-week training period. In conclusion, it is possible to learn to associate touch on predefined areas on the forearm with specific fingers after a structured training period, and the effect persisted after 2 weeks. These results may be of importance for the development of non-invasive sensory feedback systems in hand prostheses. Objective: Currently available hand prostheses lack sensory feedback. A "phantom hand map", a referred sensation, on the skin of the residual arm is a possible target to provide amputees with non-invasive somatotopically matched sensory feedback. However, not all amputees experience a phantom hand map. The aim of this study was to explore whether touch on predefined areas on the forearm can be associated with specific fingers. Design: A longitudinal cohort study. Subjects: A total of 31 able-bodied individuals. Methods: A "tactile display" was developed consisting of 5 servo motors, which provided the user with mechanotactile stimulus. Predefined pressure points on the volar aspect of the forearm were stimulated during a 2-week structured training period. Results: Agreement between the stimulated areas and the subjects' ability to discriminate the stimulation was high, with a distinct improvement up to the third training occasion, after which the kappa score stabilized for the rest of the period. Conclusion: It is possible to associate touch on intact skin on the forearm with specific fingers after a structured training period, and the effect persisted after 2 weeks. These results may be of importance for the development of non-invasive sensory feedback systems in hand prostheses.

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“…In addition, some studies have reported reduced PLP when sensory feedback is added to a prosthetic hand ( Dietrich et al, 2012 ; Page et al, 2018 ; Petrini et al, 2018 ). In recent years researchers have tried to provide sensory feedback in hand prostheses in different ways ( Schofield et al, 2014 ; Svensson et al, 2017 ; Pasluosta et al, 2018 ; Stephens-Fripp et al, 2018 ), using invasive methods, using implanted neural interfaces ( Ortiz-Catalan et al, 2014 ; Oddo et al, 2016 ; Schiefer et al, 2016 ; Graczyk et al, 2018 ; Petrini et al, 2019 ), and using non-invasive methods through vibrotactile or mechanotactile feedback methods ( Hebert et al, 2014 ; Clemente et al, 2016 ; Raveh et al, 2018 ; Schoepp et al, 2018 ). Studies with sensory prosthetic hands in home use are infrequently presented, but a few case reports are published ( Ortiz-Catalan et al, 2014 ; Clemente et al, 2016 ; Graczyk et al, 2018 ; Cuberovic et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Sensory Feedback in Hand Prostheses: A Prospective Study of Everyday Use

et al. 2020

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Introduction Sensory feedback in hand prostheses is lacking but wished for. Many amputees experience a phantom hand map on their residual forearm. When the phantom hand map is touched, it is experienced as touch on the amputated hand. A non-invasive sensory feedback system, applicable to existing hand prostheses, can transfer somatotopical sensory information via phantom hand map. The aim was to evaluate how forearm amputees experienced a non-invasive sensory feedback system used in daily life over a 4-week period. Methods This longitudinal cohort study included seven forearm amputees. A non-invasive sensory feedback system was used over 4 weeks. For analysis, a mixed method was used, including quantitative tests (ACMC, proprioceptive pointing task, questionnaire) and interviews. A directed content analysis with predefined categories sensory feedback from the prosthesis, agency, body ownership, performance in activity , and suggestions for improvements was applied. Results The results from interviews showed that sensory feedback was experienced as a feeling of touch which contributed to an experience of completeness. However, the results from the questionnaire showed that the sense of agency and performance remained unchanged or deteriorated. The ability to feel and manipulate small objects was difficult and a stronger feedback was wished for. Phantom pain was alleviated in four out of five patients. Conclusion This is the first time a non-invasive sensory feedback system for hand prostheses was implemented in the home environment. The qualitative and quantitative results diverged. The sensory feedback was experienced as a feeling of touch which contributed to a feeling of completeness, linked to body ownership. The qualitative result was not verified in the quantitative measurements. Clinical Trial Registration Name: Evaluation of a Non-invasive Sensory Feedback System in Hand Prostheses. Date of registration: March 15, 2019. Date the first participant was enrolled: April 1, 2015. ClinicalTrials.gov Identifier: NCT03876405 ORCID ID: https://orcid.org/0000-0002-4140-7478 .

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Adding vibrotactile feedback to a myoelectric-controlled hand improves performance when online visual feedback is disturbed

Cited by 27 publications

References 24 publications

Visual attention, EEG alpha power and T7-Fz connectivity are implicated in prosthetic hand control and can be optimized through gaze training

Visual attention, EEG alpha power and T7-Fz connectivity are implicated in prosthetic hand control and can be optimized through gaze training

Touch on predefined areas on the forearm can be associated with specific fingers: Towards a new principle for sensory feedback in hand prostheses

Sensory Feedback in Hand Prostheses: A Prospective Study of Everyday Use

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