Assessment of the peripheral performance and cortical effects of SHADE, an active device promoting ankle dorsiflexion (Contributo in atti di convegno)

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  • Assessment of the peripheral performance and cortical effects of SHADE, an active device promoting ankle dorsiflexion (Contributo in atti di convegno) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
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  • S. Viscuso1, S. Pittaccio1, F. Tecchio2, F. Zappasodi2,M. Rossini 3, L. Magoni 3, S. Pirovano3, S. Besseghini1, F. Molteni3 (2008)
    Assessment of the peripheral performance and cortical effects of SHADE, an active device promoting ankle dorsiflexion
    in 13th International Conference on Biomedical Engineering 2008, Singapore
    (literal)
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  • S. Viscuso1, S. Pittaccio1, F. Tecchio2, F. Zappasodi2,M. Rossini 3, L. Magoni 3, S. Pirovano3, S. Besseghini1, F. Molteni3 (literal)
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  • Questo lavoro ha ricevuto l’ “Outstanding paper award” all’interno della stessa conferenza: http://icbme.inmeet.com.sg/awards/ (literal)
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  • Abstract: Acute post-stroke rehabilitation protocols include passive mobilisation as a means to prevent contractures, but this technique could also help preserve neuromuscular activation patterns through proprioceptive information. This paper presents SHADE, an active AFO that provides repetitive passive motion to a flaccid ankle by using shape memory alloy wire actuators. These alloys are very deformable at room temperature but can recover large deformations and generate considerable forces when heated above a characteristic temperature. Heating is provided by Joule’s effect, cooling by natural convection. SHADE was studied to assess the promoted passive range of motion (PROM), acceptability and cortical effects. PROM was assessed on 3 acute post-stroke patients (58±5y/o) by means of optoelectronic cinematic analysis. Acceptability was addressed with a questionnaire presented to further 3 acute post-stroke patients (44±11.5y/o) who used SHADE for 1 week, half hour a day. EEG/MEG instrumentation was utilised to evaluate sensorimotor cortical involvement during passive mobilisation induced by SHADE in 8 healthy subjects (36.5±19.7y/o). These data were compared with voluntary movement (VM) and passive neuromuscular electrical stimulation (NMES). SHADE produced good mobilisation across the available PROM (typically, from 5° plantarflexion to 15° dosiflexion). The rate of dorsiflexion was comparable with self-imposed movement in patient with residual active control, while plantarflexion (driven by wire cooling) is inevitably slower, ensuring that stretch is maintained for around 70% of the cycle. Acceptability in patients was also good. The cerebral involvement in primary sensorimotor and premotor areas was recognised in VM as a reduction of the alpha (8-12Hz) and beta (13-33Hz) bands with respect to rest, and it appears to be more similar with SHADE than during NMES. This stimulation could have clinical implications in supporting recovery of active functionality in stroke patients. As a future development the effectiveness of prolonged passive mobilisation will be studied in acute stroke patients. (literal)
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  • CNR-IENI CNR-ISTC Afar Roma Ospedale Valduce Clinica Villa Beretta (literal)
Titolo
  • Assessment of the peripheral performance and cortical effects of SHADE, an active device promoting ankle dorsiflexion (literal)
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