Juan Mena

: El discernimiento pastoral está llamado a enriquecerse en diálogo con diversas reflexiones seculares para iluminar la praxis eclesial. En este artículo nos centramos en la Teoría U de O. Scharmer, pues consideramos que ilumina algunas exigencias del discernimiento pastoral en el tiempo presente: la sinodalidad y la revisión crítica de los procesos de los órganos eclesiales. Propone también la meditación silenciosa como una dimensión esencial dentro de una pedagogía de renovación profunda en forma de U. El liderazgo innovador que propone el autor como una urgencia global nos permitirá transformar las organizaciones para cambiar el mundo, creando auténticos ecosistemas de innovación y creatividad que nos capaciten para cocrear el futuro con mente, voluntad y corazón abiertos. Por último, hacemos una evaluación teológicopastoral de esta aportación en relación con el discernimiento pastoral y sugerimos nuevos horizontes para repensarlo y actualizarlo en la praxis

The Hoffmann reflex (H-wave) is produced by alpha-motoneuron activation in the spinal cord. A feature of this electromyography response is that it exhibits fluctuations in amplitude even during repetitive stimulation with the same intensity of current. We herein explore the hypothesis that physical training induces plastic changes in the motor system. Such changes are evaluated with the fractal dimension (FD) analysis of the H-wave amplitude-fluctuations (H-wave FD) and the cross-covariance (CCV) between the bilateral H-wave amplitudes. The aim of this study was to compare the H-wave FD as well as the CCV before and after track training in sedentary individuals and athletes. The training modality in all subjects consisted of running three times per week (for 13 weeks) in a concrete road of 5 km. Given the different physical condition of sedentary vs. athletes, the running time between sedentary and athletes was different. After training, the FD was significantly increased in sedentary individuals but significantly reduced in athletes, although there were no changes in spinal excitability in either group of subjects. Moreover, the CCV between bilateral H-waves exhibited a significant increase in athletes but not in sedentary individuals. These differential changes in the FD and CCV indicate that the plastic changes in the complexity of the H-wave amplitude fluctuations as well as the synaptic inputs to the Ia-motoneuron systems of both legs were correlated to the previous fitness history of the subjects. Furthermore, these findings demonstrate that the FD and CCV can be employed as indexes to study plastic changes in the human motor system.