Although musical neurofeedback is used in multiple works, few systems have been developed for stress regulation, and no systems have been developed for memory stimulation. For this reason, a music-based neurofeedback system for stress regulation and memory stimulation is proposed. This system was designed as a response to a previous research called “Neurophysiology of Emotions and Intimate Partner Violence (IPV) against Women”. The designed system uses 8 EEG channels to analyze alpha and theta brain-waves from 4 areas of the brain: prefrontal, frontal, temporal and central. By recording a 30 seconds baseline, the system is capable to detect changes in the EEG signal that can be used for the interaction. For feedback, three musical features are modified depending on the EEG analysis: tempo, loudness and loudness of the voice of the singer. For testing the system, two protocols were designed, these protocols focused on memory stimulation and stress regulation. They were designed specifically for each one of the three types of feedback. These protocols were applied on two women (43 and 52 years old), both had been part of the previous project. Results are promising, showing changes in the EEG signals of the participants when comparing the first session and the last one. Changes in performance of some specific tasks in the protocols, show an adequate usability of the system. Further studies will be carry on in order to evaluate long-term effects of the system with more activities.
Juan López López, D. Carolina Cárdenas-Poveda, María Paula Acero Triviño, Alexandra González-Álvarez, Alejandra Rizo-Arévalo, Mayerli Andrea Prado-Rivera, Eliana Mejía-Soto, Jose Luis Velazquez-Perez, Catalina Espitia
Intimate Partner Violence (IPV) against women is a major problem in Colombia. Nowadays the question about the effects of violence on women and the identification of latent risks that affect their health, is increasingly relevant. This article describes a pilot study that aimed to measure electrophysiological signals corresponding to the emotional neurophysiological response of women who had experienced IPV in contrast to those who did not. Six healthy female adults, ranged in age from 18 to 55 years old enrolled in this study. For the measurement we used the International Affective Picture System (IAPS) and an Auditory and Visual Emotional Memory Test (avEMT), and we recorded the EEG signal with a g.Nautilus 32 g.LadyBird. EEG signals acquired from baseline and during the tests were compared. As a result of IAPS test, we found for all the participants a higher power spectrum at low EEG frequencies and a decrease in power as the frequencies increase for baseline and emotional pictures. For the avMET, both groups show a higher power spectrum in the different phases of the task compared with the baseline, with an exception of one participant from the WIPV group who show the opposite tendency. Also, two machine learning models were trained and an accuracy of more than 85% were achieved to classify EEG signals from women who experienced IPV and women who had not. This research is an approach to the phenomenon of violence against women and broadens the understanding of the effects on emotional response and electrophysiological activation in women who have experienced this type of situation.
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