Neuroscience research has shown that meditation practices have effects on brain structure and function. However, few studies have combined information on the effects on structure and function in the same sample. Long-term daily meditation practice produces repeated activity of specific brain networks over years of practice, which may induce lasting structural and functional connectivity changes within relevant circuits. The aim of our study was therefore to identify differences in FC during the resting state between 23 Sahaja Yoga Meditation experts and (...) 23 healthy participants without meditation experience. Seed-based FC analysis was performed departing from voxels that had shown structural differences between these same participants. The contrast of connectivity maps yielded that meditators showed increased FC between the left ventrolateral prefrontal cortex and the right dorsolateral prefrontal cortex but reduced FC between the left insula and the bilateral mid-cingulate as well as between the right angular gyrus and the bilateral precuneus/cuneus cortices. It thus appears that long-term meditation practice increases direct FC between ventral and dorsal frontal regions within brain networks related to attention and cognitive control and decreases FC between regions of these networks and areas of the default mode network. (shrink)

The neural basis of developmental changes in transitive reasoning in parietal regions was examined, using voxel-based morphometry. Young adolescents and adults performed a transitive reasoning task, subsequent to undergoing anatomical magnetic resonance imaging brain scans. Behaviorally, adults reasoned more accurately than did the young adolescents. Neural results showed less grey matter density in superior parietal cortex in the adults than in the young adolescents, possibly due to a developmental period of synaptic pruning; improved performance in the reasoning task was negatively (...) correlated with grey matter density in superior parietal cortex in the adolescents, but not in the adult group; and the latter results were driven by the more difficult trials, requiring greater spatial manipulation. Taken together, the results support the idea that during development, regions in superior parietal cortex are fine-tuned, to support more robust spatial manipulation, resulting in gre... (shrink)

The certainty that natural phenomena and processes could be represented in a physical space ruled by Euclidean geometry was a fundamental epistemological assumption of theoretical creation in classical science. The possibility of a mathematical analysis of the continuum ensured an intuitive, pictorial description of mobile trajectories as studied in dynamics, as well as a precise determination of the effects generated within causal relations. These convictions and assumptions had to be reviewed when the Plank action quantum forced the development of a (...) new physics of atomic systems. Consequences, nevertheless, transcended the scope of Physics and extended to all regions of natural science, including Biology, which had to be built under the conceptual coverage of the nascent mechanics. The present work is a reflection on the philosophical problems posed by the encounter of physics of atoms and chemistry of molecules. (shrink)

La convicción de que los fenómenos y procesos naturales podían ser representados en un espacio físico regido por la geometría euclídea actuó en la ciencia clásica como supuesto epistemológico fundamental de la creación teórica. La posibilidad de un análisis matemático del continuo garantizaba, en efecto, una descripción intuitiva y pictórica de las trayectorias de los móviles estudiadas por la dinámica, así como una determinación precisa de los efectos producidos en el seno de las relaciones causales. Fueron convicciones y supuestos que (...) tuvieron que ser revisados en el momento en que el cuanto de acción de Planck obligó a desarrollar una nueva... física de los sistemas atómicos. Las consecuencias, no obstante, se dejarían sentir no sólo en el ámbito de la Física sino en todas aquellas regiones de la ciencia natural, como la Biología, que tenían que construirse bajo la cobertura conceptual de la naciente mecánica. El presente trabajo es una reflexión sobre los problemas filosóficos planteados en el encuentro entre la física del átomo y la química de las moléculas. The certainty that natural phenomena and processes could be represented in a physical space ruled by Euclidean geometry was a fundamental epistemological assumption of theoretical creation in classical science. The possibility of a mathematical analysis of the continuum ensured an intuitive, pictorial description of mobile trajectories as studied in dynamics, as well as a precise determination of the effects generated within causal relations. These convictions and assumptions had to be reviewed when the Plank action quantum forced the development of a new physics of atomic systems. Consequences, nevertheless, transcended the scope of Physics and... extended to all regions of natural science, including Biology, which had to be built under the conceptual coverage of the nascent mechanics. The present work is a reflection on the philosophical problems posed by the encounter of physics of atoms and chemistry of molecules. (shrink)

En forma de carta dirigida al amigo ausente se hace un elogio de la vida virtuosa y del conocimiento universal que brota de la cuna sencilla. No hay mayor apertura que el amor por la verdad y la tolerancia.

¿Qué significa hoy plantearnos la presencia de la filosofía española en el bachillerato? ¿Que sentido tiene hacerse esta pregunta? ¿Por qué es necesario hacérsela? La respuesta a estas cuestiones es muy importante a la hora de buscar el sentido de la presencia o ausencia de la filosofía en nuestro bachillerato.

A través de una mirada histórica este artículo muestra cómo filosofía y literatura han mantenido una línea de relación compleja pero inevitable, mostrando esa zona en que los seres humanos, como individuos y seres sociales, han de dar respuestas a situaciones singulares desde la experiencia adquirida y la atención a la multiplicidad. Se hace hincapié en las principales etapas, se mencionan algunos autores relevantes y se ofrece al lector una reflexión que presenta ambas formas como necesarias para la construcción del (...) orden y buscar salidas a la encrucijada de la vida pues esta, conocimiento y sentido moral, solo es viable desde esa doble atención. (shrink)

En forma de carta dirigida al amigo ausente se hace un elogio de la vida virtuosa y del conocimiento universal que brota de la cuna sencilla. No hay mayor apertura que el amor por la verdad y la tolerancia.

This paper introduces the concept of assisted dialogue as a scaffolding tool for academic writing management shared for teachers and postgraduate students. The concept is characterized and examples of this type of intervention aimed at understanding general questions of educational research and the production of academic texts are presented.

For several decades, tourism has mainly been identified as an activity that helps people escape their everyday routines, contributes to understanding between cultures, and promotes economic wellbeing. These assumptions have been questioned in both the public sphere and academic research, however. In this context, tourism research is increasingly drawing on ethical frameworks to support its criticism of tourism. Some of the most outstanding research on this issue is by Dean MacCannell, Emeritus Professor at the University of California at Davis and (...) author of one of the seminal works of the social theory of tourism: The Tourist: A New Theory of the Leisure Class (1976). MacCannell examines the moral and ethical aspects of tourism in all his writing, but they are the focal point of his book The Ethics of Sightseeing (2011), in which he identifies the tourists’ responsibility to mediate between their understanding of their own pleasure and the ethical repercussions of the late modern imperative, “Enjoy!”. During the Touriscape congress in Malaga, Spain, in February 2018, MacCannell talked about ethics and tourism with José Luis López, who prepared this interview for Recerca. (shrink)

Reseña de la obra de Orden Jiménez, Rafael V., Humanismo Republicano Iberoamericano. Un debate. Ambrosio Velasco Gómez; José Luis Villacañas Berlanga, Madrid, Biblioteca Nueva, 2019, pp. 127.

Presentado como ponencia en el Congreso Internacional que sobre el exilio se celebró en la UNAM el año 2009 con motivo de celebrarse el 70º aniversario del exilio de 1939 este artículo ha sido completado y actualizado para ofrecer una aproximación a las etapas por las que ha pasado la recepción del exilio filosófico así como a los nombres y publicaciones más importantes que han protagonizado este proceso. Desde los pioneros, pasando por la etapa intermedia, habríamos comenzado la fase de (...) una normalización que culminará cuando el pensamiento de estos autores se incorpore a la enseñanza reglada en nuestras universidades. Cuando esta avance más, la historia de la filosofía española mostrará mejor la cualidad que María Zambrano exigía a cualquier tradición: “continuidad y vigencia”. (shrink)

Aprender de los griegos es posible, pero solo si partimos de dos bases necesarias: la primera, que nuestro mundo es profundamente distinto al suyo; la segunda, que el pensamiento libre requiere no quedar prisionero de ningún dogma. La forma primitiva de pensar de los griegos es una escuela que nos puede ayudar a desnudar la enorme cantidad de supuestos en los que se apoya la mentalidad contemporánea.

Fibromyalgia is a chronic pain syndrome characterized by dysfunctional processing of nociceptive stimulation. Neuroimaging studies have pointed out that pain-related network functioning seems to be altered in these patients. It is thought that this clinical symptomatology may be maintained or even strengthened because of an enhanced expectancy for painful stimuli or its forthcoming appearance. However, neural electrophysiological correlates associated with such attentional mechanisms have been scarcely explored. In the current study, expectancy processes of upcoming laser stimulation (painful and non-painful) and (...) its further processing were explored by event-related potentials (ERPs). Nineteen fibromyalgia patients and twenty healthy control volunteers took part in the experiment. Behavioral measures (reaction times and subjective pain perception) were also collected. We manipulated the pain/no pain expectancy through an S1–S2 paradigm (cue-target). S1 (image: triangle or square) predicted the S2 appearance (laser stimulation: warmth or pinprick sensation). Laser stimuli were delivered using a CO2 laser device. Temporal and spatial principal component analyses were employed to define and quantify the ERP component reliability. Statistical analyses revealed the existence of an abnormal pattern of pain expectancy in patients with fibromyalgia. Specifically, our results showed attenuated amplitudes at posterior lCNV component in anticipation of painful stimulation that was not found in healthy participants. In contrast, although larger P2 amplitudes to painful compared to innocuous events were shown, patients did not show any amplitude change in this laser-evoked response as a function of pain predictive cues (as occurred in the healthy control group). Additionally, analyses of the subjective perception of pain and reaction time indicated that laser stimuli preceded by pain cues were rated as more painful than those signaling non-pain expectancy and were associated with faster responses. Differences between groups were not found. The present findings suggest the presence of dysfunction in pain expectation mechanisms in fibromyalgia that eventually may make it difficult for patients to correctly interpret signs that prevent pain symptoms. Furthermore, the abnormal pattern in pain expectancy displayed by fibromyalgia patients could result in ineffective pain coping strategies. Understanding the neural correlates of pain processing and its modulatory factors is crucial to identify treatments for chronic pain syndromes. (shrink)

La presente investigación con diseño metodológico experimental, de tipo cualitativa con un aprendizaje basado en método de observación a 15 estudiantes en cada grupo, como propuesta didáctica extracurricular, realizada dentro de la asignatura de Química General del tronco común en Ingeniería, implantada en tres semestres consecutivos 2018-1, 2018-2 y 2019-1, en el Laboratorio de Química, de la Universidad Autónoma de Baja California, Campus Guadalupe Victoria del Valle de Mexicali, en Baja California, México. La materia de Química General, es de carácter (...) obligatorio y está ubicado en el segundo semestre del tronco común de las ciencias de la ingeniería. (shrink)

The COVID-19 disease has caused thousands of deaths worldwide and required the rapid and drastic adoption of various protective measures as main resources in the fight to reduce the spread of the disease. In the present study we aimed to identify socio cognitive factors that may influence adherence to protective measures toward COVID-19 in a Spanish sample. This longitudinal study analyzes the predictive value of perceived severity and vulnerability of infection, self-efficacy, direct exposure to the virus, and instrumental focused coping (...) style for adhering to infection protection behaviors during the first months of the COVID-19 pandemic. It also tests sex and age differences in these factors and changes over time. A two-wave longitudinal study was conducted in March and April 2020 starting the day after a strict national lockdown was decreed in Spain. A path analysis was used to test direct and indirect effects between vulnerability and the adherence to protective behaviors. Results suggest that individuals' perceived severity and vulnerability to COVID-19 and instrumental coping strategies are related to the use of more protective behaviors. This coping strategy mediates the effect of perceived vulnerability on engaging in protective behaviors, and this effect depends on direct exposure to COVID-19 and perceived self-efficacy moderators. Results suggest that recognizing one's own abilities to engage in instrumental actions may facilitate adherence to protective measures in people who had not been directly exposed to COVID-19. Therefore, adopting instrumental coping strategies to manage an individual's perceived vulnerability to infection may positively impact the adherence to protective behaviors, especially during the onset of an unexpected threat and when there is no prior direct experience with the situation. (shrink)

Automatic control of physiological variables is one of the most active areas in biomedical engineering. This paper is centered in the prediction of the analgesic variables evolution in patients undergoing surgery. The proposal is based on the use of hybrid intelligent modelling methods. The study considers the Analgesia Nociception Index to assess the pain in the patient and remifentanil as intravenous analgesic. The model proposed is able to make a one-step-ahead prediction of the remifentanil dose corresponding to the current state (...) of the patient. The input information is the previous remifentanil dose, the ANI variable and the electromyogram signal. Modelling techniques used are Artificial Neural Networks and Support Vector machines for Regression combined with clustering methods. Both training and validation were done with a real dataset from different patients. Results obtained show the potential of this methodology to calculate the drug dose corresponding to a given analgesic state of the patient. (shrink)