ABSTRACT
Sound synthesis refers to the creation of original acoustic signals with broad applications in artistic innovation, such as music creation for games and videos. Nonetheless, machine learning architectures face numerous challenges when learning musical structures from arbitrary corpora. This issue involves adapting patterns borrowed from other contexts to a concrete composition objective. Using Labeled Correlation Alignment (LCA), we propose an approach to sonify neural responses to affective music-listening data, identifying the brain features that are most congruent with the simultaneously extracted auditory features. For dealing with inter/intra-subject variability, a combination of Phase Locking Value and Gaussian Functional Connectivity is employed. The proposed two-step LCA approach embraces a separate coupling stage of input features to a set of emotion label sets using Centered Kernel Alignment. This step is followed by canonical correlation analysis to select multimodal representations with higher relationships. LCA enables physiological explanation by adding a backward transformation to estimate the matching contribution of each extracted brain neural feature set. Correlation estimates and partition quality represent performance measures. The evaluation uses a Vector Quantized Variational AutoEncoder to create an acoustic envelope from the tested Affective Music-Listening database. Validation results demonstrate the ability of the developed LCA approach to generate low-level music based on neural activity elicited by emotions while maintaining the ability to distinguish between the acoustic outputs.
Subject(s)
Brain Mapping , Music , Brain Mapping/methods , Electroencephalography/methods , Brain/physiology , Emotions/physiology , Auditory Perception/physiology , Music/psychology , Acoustic StimulationABSTRACT
Abstract Introduction: Around the world, inguinal hernia repair is one of the most frequent surgical interventions and is associated with moderate to severe postoperative pain. TAP (Transver-sus Abdominis Plane) block appears to be a useful tool to reduce the morbidity associated with pain in inguinal hernia repair. Objective: To evaluate the analgesic effect of a TAP block in patients scheduled for primary inguinal hernia repair, 1 h and 24-h post-surgery. Materials and methods : Randomized controlled trial. 45 patients were randomized to receive placebo vs. TAP block. Clinical, surgical and anesthetic variables were analyzed. The primary outcome was pain in the first hour and the secondary outcome was pain during the first 24 h, opiate use and side effects. Results: The acute postoperative pain score during the first hour in the control group was 6 with maximum values of 9 in 22% of patients, whereas in the intervention group the pain score was 2 (SD: 1) (p: 0.03). Likewise, pain 24 h postop and opiate consumption was lower in the intervention group than in the control group. Conclusions: TAP block helps to reduce acute postoperative pain and the use of opiates in inguinal hernia repair.
Resumen Introducción: La herniorrafia inguinal es una de las cirugías más realizadas en el mundo, y está asociada con dolor postoperatorio de moderado a severo. El bloqueo del plano transverso del abdomen (transversus abdominus plane [TAP]) parece ser una técnica útil para disminuir la morbilidad asociada con el dolor en herniorrafia inguinal. Objetivo: Evaluar el efecto analgésico del bloqueo TAP a la hora y a las 24 h postoperatorias en herniorrafia inguinal. Materiales y métodos: Se realizó un estudio doble ciego donde se aleatorizaron 45 pacientes para recibir bloqueo TAP vs placebo, se analizaron variables clínicas, quirúrgicas y anestésicas, y se evaluó como resultado primario la intensidad de dolor agudo postoperatorio (pop) una hora después de la cirugía y, como resultados secundarios, el dolor a las 24 h, el consumo de opiáceos y la presencia de reacciones adversas. Resultados: El dolor agudo postoperatorio a la primera hora en el grupo control fue de 6, con valores máximos de 9 en el 22% de los pacientes, mientras que el dolor en la primera hora en el grupo intervención fue de 2 (DE: 1) (p = 0,03). De igual forma, el dolor a las 24h pop y el consumo de opiáceos fue menor en el grupo intervención que en el grupo control. Conclusiones: El bloqueo TAP es útil en la reducción del dolor agudo pop y del consumo de opiáceos en herniorrafia inguinal.
