Identification of motor imagery tasks using power-based connectivity descriptors from EEG signals
dc.contributor.advisor | Ruiz Olaya, Andrés Felipe | spa |
dc.contributor.author | Guerrero Méndez, Cristian David | spa |
dc.creator.cedula | 10561823553 | spa |
dc.date.accessioned | 2022-05-19T19:09:26Z | |
dc.date.available | 2022-05-19T19:09:26Z | |
dc.date.issued | 2021-11-12 | spa |
dc.description.abstract | In recent years, functional connectivity has been studied through electroencephalography signals to analyze the patterns generated by the electrical conductions of the brain. In BCI systems, the paradigm of motor imagery has been used to generate patterns to identify the user’s intention. However, the study of techniques that allow the correct identification and classification of such intention is still a challenge due to the low performance of algorithms for rehabilitation engineering applications. This study addresses the problem of binary identification of left and right-hand opening and closing motor imagery tasks. A method called Power-Based Connectivity (PBC) is proposed that correlates two reference channels in the central cortex (C3 and C4) with other channels located in the central area of the brain. The methods were evaluated using an EEG dataset of six subjects with no previous experience in BCI systems built at the Antonio Narino University. The method was compared ˜ with a standard feature extraction method based on Power Spectral Density (PSD). It was used for evaluation accuracy and cohen’s Kappa coefficients metrics. Maximum accuracy and cohen’s Kappa coefficient of 0.7733 and 0.5488, respectively, were obtained using the Linear Discriminant Analysis (LDA) classifier. Finally, the proposed method was superior in performance and presents significant results in the alpha (α) frequency band and the combination of alpha (α) and beta (β). This leads to the conclusion that the proposed method is adequate for user intent identification in a motor imagery-based BCI system of users with no prior experience. | eng |
dc.description.abstract | En los últimos años, la conectividad funcional ha sido estudiado a través de señales de electroencefalografía para analizar la patrones generados por las conducciones eléctricas del cerebro. En los sistemas BCI, se ha utilizado el paradigma de la imaginería motora generar patrones para identificar la intención del usuario. Sin embargo, el estudio de técnicas que permitan la correcta identificación y clasificación de tal intención sigue siendo un desafío debido a la baja rendimiento de algoritmos para aplicaciones de ingeniería de rehabilitación. Este estudio aborda el problema de la identificación binaria. de tareas de imágenes motoras de apertura y cierre de mano izquierda y derecha. Se propone un método llamado Conectividad basada en energía (PBC) que correlaciona dos canales de referencia en la corteza central (C3 y C4) con otros canales ubicados en la zona central del cerebro. Los métodos se evaluaron utilizando un conjunto de datos de EEG de seis sujetos sin experiencia previa en sistemas BCI construidos en la Universidad Antonio Nariño. Se comparó el método ˜ con un método de extracción de características estándar basado en Power Densidad espectral (PSD). Se utilizó para evaluar la precisión. y las métricas de los coeficientes Kappa de Cohen. Máxima precisión y coeficiente Kappa de Cohen de 0,7733 y 0,5488, respectivamente, fueron obtenidos mediante el clasificador Análisis Discriminante Lineal (LDA). Finalmente, el método propuesto fue superior en rendimiento y presenta resultados significativos en la banda de frecuencia alfa (α) y la combinación de alfa (α) y beta (β). Esto lleva a la conclusión de que el método propuesto es adecuado para la intención del usuario identificación en un sistema BCI basado en imágenes motoras de usuarios sin experiencia previa. | spa |
dc.description.degreelevel | Pregrado | spa |
dc.description.degreename | Ingeniero(a) Biomédico(a) | spa |
dc.description.degreetype | Investigación | spa |
dc.description.notes | Presencial | spa |
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dc.identifier.instname | instname:Universidad Antonio Nariño | spa |
dc.identifier.reponame | reponame:Repositorio Institucional UAN | spa |
dc.identifier.repourl | repourl:https://repositorio.uan.edu.co/ | spa |
dc.identifier.uri | http://repositorio.uan.edu.co/handle/123456789/6578 | |
dc.language.iso | eng | spa |
dc.publisher | Universidad Antonio Nariño | spa |
dc.publisher.campus | Bogotá - Sur | spa |
dc.publisher.faculty | Facultad de Ingeniería Mecánica, Electrónica y Biomédica | spa |
dc.publisher.program | Ingeniería Biomédica | spa |
dc.rights | Acceso a solo metadatos | |
dc.rights.accessrights | info:eu-repo/semantics/closedAccess | spa |
dc.rights.coar | http://purl.org/coar/access_right/c_14cb | spa |
dc.rights.license | Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) | spa |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | spa |
dc.subject | Electroencefalografía (EEG) | es_ES |
dc.subject | Cerebro- Interfaz de computadora | es_ES |
dc.subject | Conectividad basada en energía | es_ES |
dc.subject | Conectividad funcional | es_ES |
dc.subject.ddc | 621.7 | es_ES |
dc.subject.keyword | Electroencephalography (EEG) | es_ES |
dc.subject.keyword | Brain- Computer Interface (BCI) | es_ES |
dc.subject.keyword | Power-Based Connectivity | es_ES |
dc.subject.keyword | Functional Connectivity | es_ES |
dc.title | Identification of motor imagery tasks using power-based connectivity descriptors from EEG signals | es_ES |
dc.type | Trabajo de grado (Pregrado y/o Especialización) | spa |
dc.type.coar | http://purl.org/coar/resource_type/c_7a1f | spa |
dc.type.coarversion | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |
dc.type.version | info:eu-repo/semantics/acceptedVersion | spa |
dcterms.audience | Especializada | spa |
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