Hybrid brain-computer interfaces and hybrid neuroprostheses for restoration of upper limb functions in individuals with high-level spinal cord injury
Background - The bilateral loss of the grasp function associated with a lesion of the cervical spinal cord severely limits the affected individuals’ ability to live independently and return to gainful employment after sustaining a spinal cord injury (SCI). Any improvement in lost or limited grasp fu...
Gespeichert in:
| Hauptverfasser: | , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
13 September 2013
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| In: |
Artificial intelligence in medicine
Year: 2013, Jahrgang: 59, Heft: 2, Pages: 133-142 |
| ISSN: | 1873-2860 |
| DOI: | 10.1016/j.artmed.2013.07.004 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.artmed.2013.07.004 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0933365713001176 
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| Verfasserangaben: | Martin Rohm, Matthias Schneiders, Constantin Müller, Alex Kreilinger, Vera Kaiser, Gernot R. Müller-Putz, Rüdiger Rupp |
MARC
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| 245 | 1 | 0 | |a Hybrid brain-computer interfaces and hybrid neuroprostheses for restoration of upper limb functions in individuals with high-level spinal cord injury |c Martin Rohm, Matthias Schneiders, Constantin Müller, Alex Kreilinger, Vera Kaiser, Gernot R. Müller-Putz, Rüdiger Rupp |
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| 520 | |a Background - The bilateral loss of the grasp function associated with a lesion of the cervical spinal cord severely limits the affected individuals’ ability to live independently and return to gainful employment after sustaining a spinal cord injury (SCI). Any improvement in lost or limited grasp function is highly desirable. With current neuroprostheses, relevant improvements can be achieved in end users with preserved shoulder and elbow, but missing hand function. - Objective - The aim of this single case study is to show that (1) with the support of hybrid neuroprostheses combining functional electrical stimulation (FES) with orthoses, restoration of hand, finger and elbow function is possible in users with high-level SCI and (2) shared control principles can be effectively used to allow for a brain-computer interface (BCI) control, even if only moderate BCI performance is achieved after extensive training. - Patient and methods - The individual in this study is a right-handed 41-year-old man who sustained a traumatic SCI in 2009 and has a complete motor and sensory lesion at the level of C4. He is unable to generate functionally relevant movements of the elbow, hand and fingers on either side. He underwent extensive FES training (30-45min, 2-3 times per week for 6 months) and motor imagery (MI) BCI training (415 runs in 43 sessions over 12 months). To meet individual needs, the system was designed in a modular fashion including an intelligent control approach encompassing two input modalities, namely an MI-BCI and shoulder movements. - Results - After one year of training, the end user's MI-BCI performance ranged from 50% to 93% (average: 70.5%). The performance of the hybrid system was evaluated with different functional assessments. The user was able to transfer objects of the grasp-and-release-test and he succeeded in eating a pretzel stick, signing a document and eating an ice cream cone, which he was unable to do without the system. - Conclusion - This proof-of-concept study has demonstrated that with the support of hybrid FES systems consisting of FES and a semiactive orthosis, restoring hand, finger and elbow function is possible in a tetraplegic end-user. Remarkably, even after one year of training and 415 MI-BCI runs, the end user's average BCI performance remained at about 70%. This supports the view that in high-level tetraplegic subjects, an initially moderate BCI performance cannot be improved by extensive training. However, this aspect has to be validated in future studies with a larger population. | ||
| 650 | 4 | |a BCI training | |
| 650 | 4 | |a EEG | |
| 650 | 4 | |a Functional electrical stimulation | |
| 650 | 4 | |a Hybrid brain-computer interface (BCI) | |
| 650 | 4 | |a Hybrid neuroprosthesis | |
| 650 | 4 | |a Motor imagery | |
| 650 | 4 | |a Spinal cord injury | |
| 650 | 4 | |a Tetraplegia | |
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