Browsing by Author "Rendon Martinez, Yubely"
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Item Implementación de un control en línea de lazo cerrado de una interfaz cerebro computadora para la aplicación de un tercer brazo virtual(Universidad Santiago de Cali, 2023) Rendon Martinez, Yubely; Argüello Prada, Erick Javier (Director)Brain-machine interfaces (BCI) are systems that decode, order and use brain activity through a computer. Among the various challenges that can be found in BCI systems, brain stimulation or feedback suggests one of the most relevant since it facilitates the understanding and performance of the user. Rehabilitation training suggests one of the applications of the MI-BCI imagination paradigm, focused on guiding the brain to accept external prosthetic devices as its own, contributing to motor function along with physical rehabilitation of the upper extremities. This study implements the online closed-loop control of a brain-computer interface for the application of a virtual third arm, making the user take control of animations given the categories: left arm, right arm, imaginary third arm and resting position, as a means for rehabilitation seeking the perception of novelty for the brain in an immersive environment. The interactive environment was developed in Unity visualized in virtual reality (VR) glasses Oculus Quest 2 and controlled by EEG signals of unipolar or referential acquisition through Biosemi Active Two. A comparison of the contribution of the electrodes in the classification performance in Machine Learning, using Genetic Algorithms (GA), together with the Discrete Wavelet Transform (DWT) in the stages of feature selection and characterization respectively. A 77% accuracy of the model was obtained, using this methodology with the KNN algorithm and 79.66% user acceptance.