Compensation Strategies for Bioelectric Signal Changes in Chronic Selective Nerve Cuff Recordings: A Simulation Study.
Sensors (Basel)
; 21(2)2021 Jan 12.
Article
em En
| MEDLINE
| ID: mdl-33445808
ABSTRACT
Peripheral nerve interfaces (PNIs) allow us to extract motor, sensory, and autonomic information from the nervous system and use it as control signals in neuroprosthetic and neuromodulation applications. Recent efforts have aimed to improve the recording selectivity of PNIs, including by using spatiotemporal patterns from multi-contact nerve cuff electrodes as input to a convolutional neural network (CNN). Before such a methodology can be translated to humans, its performance in chronic implantation scenarios must be evaluated. In this simulation study, approaches were evaluated for maintaining selective recording performance in the presence of two chronic implantation challenges the growth of encapsulation tissue and rotation of the nerve cuff electrode. Performance over time was examined in three conditions training the CNN at baseline only, supervised re-training with explicitly labeled data at periodic intervals, and a semi-supervised self-learning approach. This study demonstrated that a selective recording algorithm trained at baseline will likely fail over time due to changes in signal characteristics resulting from the chronic challenges. Results further showed that periodically recalibrating the selective recording algorithm could maintain its performance over time, and that a self-learning approach has the potential to reduce the frequency of recalibration.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Nervos Periféricos
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Algoritmos
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Processamento de Sinais Assistido por Computador
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Eletrodos Implantados
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article