000			03017nmm a2200241 a 4500
008			160202e2021 ck |||fq||d| 00| 0 spa d
082	0	4	_a617.9 _bT736i _223
100			_aTovar Suárez, Bryan Nicolás. _944409
245	1	3	_aIntegration of a BCI system for the control of the T-FLEX Ankle Exoskeleton : _h[Recurso Electrónico] / _cBryan Nicolás Tovar Suárez.
260			_aBogotá (Colombia): _bEscuela Colombiana de Ingeniería Julio Garavito, _c2021
300			_a81 paginas. _bgráficos.
502	1		_aTesis (Ingeniero Biomédico)
520			_aStroke is one of the leading causes of motor and cognitive disability in the world. Despite the existence of various conventional therapies that seek to maximize the recovery of patients, Brain-Computer Interfaces (BCI) are tools to integrate the central nervous system in the rehabilitation process to empower the recovery. Technologies based on the acquisition of EEG signals seeking to complement existing therapies with exoskeletons present enormous potential. The T-FLEX is an active ankle orthosis that has shown efficiency in recovering patients with disabilities in the lower limb. This project presents the preliminary integration of T-FLEX and a BCI system based on EEG signals with validation in post-stroke patients. Initially, a theoretical framework based on Motor Imagination (MI) principles were implemented, specifically in the Event-Related Synchronization (ERS) of the beta frequency band in the central zone of the cerebral cortex. In this sense, a local server was designed, which worked as a communication bridge between the designed BCI and the T-FLEX device using different data sending protocols. In the experimental study, the BCI system was analyzed with five post-stroke patients with external stimuli facilitating the MI generation. These were visual and visual with tactile stimuli. Significant differences were found in the accuracy, which concluded greater accuracy in the ability of the BCI to detect MI with visual and tactile stimulation with an increase of 13.3% to 20%. Significant differences were found in the Power Spectral Density (PSD) related to the tests performed with visual and tactile stimulation in the Cz, C2 and Cpz channels vs. the therapy mode of the T-FLEX device, in which the patient was not required to generate MI. In the same way, the subjective perception of the patients was evaluated through a QUEST 2.0 questionnaire. The results showed that the preliminary integration of this technology is viable for future studies in the medium and long term.
650		0	_aEXOESQUELETOS ROBÓTICOS _912260
650		0	_aCEREBRO _vSISTEMA NERVIOSO CENTRAL _xICTUS _944629
650		0	_aROBÓTICA MEDICA _944624
650		0	_aTESIS DE GRADO _943245
700			_aCifuentes García, Carlos Andrés _944605 _edirector.
700			_aMúnera Ramírez, Marcela Cristina _edirector. _944356
856			_uhttps://repositorio.escuelaing.edu.co/handle/001/1563
942			_2ddc _cTE
999			_c22652 _d22652