Neural feedback strategies to improve grasping coordination in neuromusculoskeletal prostheses
Artikel i vetenskaplig tidskrift, 2020
Conventional prosthetic arms suffer from poor controllability and lack of sensory feedback. Owing to the absence of tactile sensory information, prosthetic users must rely on incidental visual and auditory cues. In this study, we investigated the effect of providing tactile perception on motor coordination during routine grasping and grasping under uncertainty. Three transhumeral amputees were implanted with an osseointegrated percutaneous implant system for direct skeletal attachment and bidirectional communication with implanted neuromuscular electrodes. This neuromusculoskeletal prosthesis is a novel concept of artificial limb replacement that allows to extract control signals from electrodes implanted on viable muscle tissue, and to stimulate severed afferent nerve fibers to provide somatosensory feedback. Subjects received tactile feedback using three biologically inspired stimulation paradigms while performing a pick and lift test. The grasped object was instrumented to record grasping and lifting forces and its weight was either constant or unexpectedly changed in between trials. The results were also compared to the no-feedback control condition. Our findings confirm, in line with the neuroscientific literature, that somatosensory feedback is necessary for motor coordination during grasping. Our results also indicate that feedback is more relevant under uncertainty, and its effectiveness can be influenced by the selected neuromodulation paradigm and arguably also the prior experience of the prosthesis user.
Författare
Enzo Mastinu
Bionik
Center for Bionics and Pain Research
Leonard F. Engels
Scuola Superiore Sant'Anna (SSSUP)
F. Clemente
Scuola Superiore Sant'Anna (SSSUP)
Prensilia SRL
Mariama Dione
Göteborgs universitet
Paolo Sassu
Sahlgrenska universitetssjukhuset
Oskar C. Aszmann
Medizinische Universität Wien
Rickard Brånemark
Massachusetts Institute of Technology (MIT)
Göteborgs universitet
Bo Håkansson
Chalmers, Elektroteknik, Signalbehandling och medicinsk teknik, Medicinska signaler och system
Marco Controzzi
Scuola Superiore Sant'Anna (SSSUP)
Johan Wessberg
Göteborgs universitet
C. Cipriani
Scuola Superiore Sant'Anna (SSSUP)
Max Jair Ortiz Catalan
Bionik
Center for Bionics and Pain Research
Göteborgs universitet
Sahlgrenska universitetssjukhuset
Scientific Reports
2045-2322 (ISSN)
Vol. 10 1 11793Ämneskategorier
Annan medicinteknik
Fysiologi
Reglerteknik
DOI
10.1038/s41598-020-67985-5