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A click-based electrocorticographic brain-computer interface enables long-term high-performance switch-scan spelling

BACKGROUND: Brain-computer interfaces (BCIs) can restore communication in movement- and/or speech-impaired individuals by enabling neural control of computer typing applications. Single command “click” decoders provide a basic yet highly functional capability. METHODS: We sought to test the performa...

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Detalles Bibliográficos
Autores principales: Crone, Nathan, Candrea, Daniel, Shah, Samyak, Luo, Shiyu, Angrick, Miguel, Rabbani, Qinwan, Coogan, Christopher, Milsap, Griffn, Nathan, Kevin, Wester, Brock, Anderson, William, Rosenblatt, Kathryn, Clawson, Lora, Maragakis, Nicholas, Vansteensel, Mariska, Tenore, Francesco, Ramsey, Nick, Fifer, Matthew, Uchil, Alpa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Journal Experts 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10571601/
https://www.ncbi.nlm.nih.gov/pubmed/37841873
http://dx.doi.org/10.21203/rs.3.rs-3158792/v1
Descripción
Sumario:BACKGROUND: Brain-computer interfaces (BCIs) can restore communication in movement- and/or speech-impaired individuals by enabling neural control of computer typing applications. Single command “click” decoders provide a basic yet highly functional capability. METHODS: We sought to test the performance and long-term stability of click-decoding using a chronically implanted high density electrocorticographic (ECoG) BCI with coverage of the sensorimotor cortex in a human clinical trial participant (ClinicalTrials.gov, NCT03567213) with amyotrophic lateral sclerosis (ALS). We trained the participant’s click decoder using a small amount of training data (< 44 minutes across four days) collected up to 21 days prior to BCI use, and then tested it over a period of 90 days without any retraining or updating. RESULTS: Using this click decoder to navigate a switch-scanning spelling interface, the study participant was able to maintain a median spelling rate of 10.2 characters per min. Though a transient reduction in signal power modulation interrupted testing with this fixed model, a new click decoder achieved comparable performance despite being trained with even less data (< 15 min, within one day). CONCLUSION: These results demonstrate that a click decoder can be trained with a small ECoG dataset while retaining robust performance for extended periods, providing functional text-based communication to BCI users.