Sistemas implantáveis de estimulação elétrica funcional para controle artificial de movimentos funcionais

Neto, Guilherme Nunes Nogueira; Manffra, Elisängela Ferretti; Nohana, Percy; Button, Vera Lúcia da Silveira Nantes

doi:10.4322/rbeb.2012.085

Cited by 1 publication

(3 citation statements)

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“…The movements initially run consisted of opening and closing the hand (gripping). Since then, different types of electrodes were used (Nogueira et al, 2010). The search for new approaches with FES in upper limbs was justified by the fact that quadriplegic people, with SCI in C5-C6 level, preserve the lower motor neuron segment in C7-C8 level, being able to restore some degree of gripping, allowing the performance of activities of daily living (ADLs), such as feeding and handling personal hygiene objects (Ragnarsson, 2008).…”

Section: Discussionmentioning

confidence: 99%

“…Faced with this problem, mechanisms are studied to artificially restore the functionality of members such as functional electrical stimulation (FES). FES applied to people with SCI aims to replace the interaction pathways that were discontinued (Nogueira et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, in people with SCI, the intensity of the stimulating current required to artificially evoke functional movements is greater than in healthy individuals (Krueger et al, 2013), probably as a result of decreasing muscle mass below the injury level caused by their inability to contract the muscles voluntarily. In addition to the care of the technical parameters, other factors Volume 32, Number 2, p. 199-211, 2016 must also be considered for the correct application of FES in individuals with SCI, including the choice of electrodes (Nogueira et al, 2010;Petrofsky, 2004); the kind of pulses (monophasic or biphasic) and the existence or not of automatic feedback of the system (operating in closed or open-loop, respectively).…”

Section: Introductionmentioning

confidence: 99%

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Artificial motor control for electrically stimulated upper limbs of plegic or paretic people

et al. 2016

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Introduction: Functional Electrical Stimulation (FES) is a technique used in the restoration and generation of movements performed by subjects with neuromuscular disorders such as spinal cord injury (SCI). The purpose of this article is to outline the state of the art and perspectives of the use of FES in artificial motor control of the upper limbs in paretic or plegic people. Methods: The databases used in papers selection were Google Scholar and Capes' Portals as well as proceedings of the Annual Conference of the International Functional Electrical Stimulation Society (IFESS). Results: Approximately 85% of the reviewed studies showed FES profile with pulse duration ranging from 1 to 300 μs and modulating (burst) frequency between 10 and 40 Hz.Regarding the type of electrodes, 88% of the studies employed transcutaneous electrodes. Conclusion: We concluded that FES with closed-loop feedback and feedforward are the most used and most viable systems for upper limbs motor control, because they perform self-corrections slowing neuromuscular adaptation, allowing different planes and more range of movement and sensory-motor integration. One of the difficulties found in neuroprosthesis systems are electrical wires attached to the user, becoming uninteresting in relation to aesthetics and break. The future perspectives lead to a trend to miniaturization of the stimulation equipment and the availability of wireless networks, which allow the attachment of modules to other components without physical contact, and will become more attractive for daily use.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%