Implementación de un prototipo de prótesis de mano usando el método BCI no invasivo a través de estímulos endógenos.

Abstract

In the present work of titration, a prototype of a hand-held prosthesis with a non-invasive brain-computer interface (BCI) was developed, with the purpose of helping research in patients who do not have said member and presents atrophied muscle problems in its extremity, disabling the use of myoelectric prostheses. During the development of the work, the design of the hand prosthesis was carried out in the SolidWorks software, taking into account the dimensions of the electronic components that are inserted into the prosthesis; for which five continuous current motors (DC) were used which exert the function of independent mobility of each finger and a servomotor that grants an extra movement to the thumb, for this a programmed position control system was designed in a microcontroller that allowed the hand prosthesis to perform the opening and closing action. Subsequently, a training stage was carried out with the BCI Emotiv Insight device, which allowed the activation signal of the endogenous stimulus, to transform a facial gesture or mental state into a real-time action, which allowed the opening and closing of the prosthesis hand. Obtaining as a result the experimental method a 90.85% similarity in the anthropomorphic measurement with the real hand and an 80.70% accuracy with respect to the range of the real mobility of the fingers. The response time between the Emotiv Insight and MindWave encephalography devices was analyzed, obtaining that Emotiv has a better response time, being the difference between the times of 19.6 seconds. The present titration work has a cost of $ 1590.4, which is relatively low compared to commercial myoelectric prostheses. It is advisable to conduct studies with other BCI devices in order to contribute to similar investigations.