IntroductionThe prefrontal cortex plays a crucial role in cognition, particularly in executive functions. Cortical reactivity measured with Transcranial Magnetic Stimulation combined with Electroencephalography is altered in pathological conditions, and it may also be a marker of cognitive status in middle-aged adults. In this study, we investigated the associations between cognitive measures and TMS evoked EEG reactivity and explored whether the effects of this relationship were related to neurofilament light chain levels, a marker of neuroaxonal damage.MethodsFifty two healthy middle-aged adults from (...) the Barcelona Brain Health Initiative cohort underwent TMS-EEG, a comprehensive neuropsychological assessment, and a blood test for NfL levels. Global and Local Mean-Field Power, two measures of cortical reactivity, were quantified after left prefrontal cortex stimulation, and cognition was set as the outcome of the regression analysis. The left inferior parietal lobe was used as a control stimulation condition.ResultsLocal reactivity was significantly associated with working memory and reasoning only after L-PFC stimulation. No associations were found between NfL and cognition. These specific associations were independent of the status of neuroaxonal damage indexed by the NfL biomarker and remained after adjusting for age, biological sex, and education.ConclusionOur results demonstrate that TMS evoked EEG reactivity at the L-PFC, but not the L-IPL, is related to the cognitive status of middle-aged individuals and independent of NfL levels, and may become a valuable biomarker of frontal lobe-associated cognitive function. (shrink)

IntroductionExcitability of the primary motor cortex measured with TMS has been associated with cognitive dysfunctions in patient populations. However, only a few studies have explored this relationship in healthy adults, and even fewer have considered the role of biological sex.MethodsNinety-seven healthy middle-aged adults completed a TMS protocol and a neuropsychological assessment. Resting Motor Threshold and Long-Interval Intracortical Inhibition were assessed in the left motor cortex and related to attention, episodic memory, working memory, reasoning, and global cognition composite scores to evaluate (...) the relationship between cortical excitability and cognitive functioning.ResultsIn the whole sample, there was a significant association between LICI and cognition; specifically, higher motor inhibition was related to better working memory performance. When the sample was broken down by biological sex, LICI was only associated with working memory, reasoning, and global cognition in men. No associations were found between RMT and cognitive functions.ConclusionGreater intracortical inhibition, measured by LICI, could be a possible marker of working memory in healthy middle-aged adults, and biological sex plays a critical role in this association. (shrink)

Heidegger ha ejercido una crítica constante de la fenomenología de Husserl desde el momento en que empezó a impartir sus primeras lecciones académcias. Uno de los momentos culminantes de este proceso es "prolegomena zur Geschichte des Zeitbegriffs", el curso del verano de 1925. Haciendo un análisis detallado de la fenomenología de la conciencia de Husserl, Heidegger denuncia que los presupuestos en los que aquélla se apoya la acercan a la filosofía tradicional y la alejan de sus pretensiones iniciales. La "fascinación (...) por la tradición" y el predominio de la teoría son los resultados principales de esta crítica inmanente. (shrink)

Un análisis crítico del discurso informativo en los medios de comunicación a nivel internacional, lleva al autor a recurrir a tres pensadores: Aristóteles, Nietzsche y Fichte para, a través de una interpretación de tres grandes obras, promover una fundamentación, marcando unos límites, de las ciencias de la información. La Retórica, la Gaya Ciencia y la Doctrina de la Ciencia, aportan unas nuevas funciones a la técnica de informar, secuestrada globalmente por el poder, en una lucha por el control de la (...) economía mundial. La información, rescatada como discurso de las manos del poder, puede producir, entonces, receptores activos en el mensaje de actualidad, siempre que ofrezca distintas interpretaciones de los hechos de opinión en el proceso de formación de la opinión pública. (shrink)

We propose a mathematical model for a class of predator–prey systems more complex than the usual one, involving a commensalism effect consisting in an influence of the predator on the sustainability of the prey. This effect induces interesting new features, including bi-stability. The question of the possibility of reaching a certain attractor starting from initial conditions with a small population of predators, which presents an interest from the vewpoint of the onset of the predator in evolution, is addressed. We propose (...) two possibilities: the classical one involving adapted conditions in the far past and a new one using biodiversity, specifically the presence of another predator which operates as a starter, being displaced in the sequel. (shrink)

In the framework of population dynamics, we start from the logistic equation describing the evolution of one species with limited food supply. A split device allows us to consider the population as two sub-populations x and y evolving analogously. The dynamical system has a one-parameter family of equilibria which is structurally unstable. Then small perturbations of the system (describing functional or ethological differentiations between the sub-species) lead in general to a new system involving a fast and a slow dynamics with (...) a finite number of equilibria. In simple situations where the differentiation is clearly either an advantage or an inconvenience for one of the subspecies, the stable equilibrium amounts to extinction of the disadvantaged subspecies (elementary Darwinism). Oppositely more complex differentiations (involving both advantages and inconveniences) often lead to stable equilibria with well-defined non zero proportions of the sub-populations (preservation of the biodiversity). Other examples are concerned with symbiosis-like differentiations, leading to preservation, whereas the opposite case (mutual nuisances) has an unstable equilibrium and lead to extinction of one or the other subspecies according to the initial conditions. The case of a scission into three subspecies is more rich in consequences. In certain cases, predator-prey relations lead to auto-organization phenomena with stable diversity-preserving diversity. Cases of instability are also possible, leading to orbits tending towards a poly-cycle.This implies some kind of pseudo-extinction: this amounts to “pseudo-periodic-like” orbits with “pseudo-periods” larger and larger, tending to infinity; each pseudo-period contains parts where one of the sub-populations practically vanish. Other non-linear perturbations lead to stable orbits. (shrink)

New aspects of spectral fluctuations of (quantum) chaotic and diffusive systems are considered, namely autocorrelations of the spacing between consecutive levels or spacing autocovariances. They can be viewed as a discretized two point correlation function. Their behavior results from two different contributions. One corresponds to (universal) random matrix eigenvalue fluctuations, the other to diffusive or chaotic characteristics of the corresponding classical motion. A closed formula expressing spacing autocovariances in terms of classical dynamical zeta functions, including the Perron–Frobenius operator, is derived. (...) It leads to a simple interpretation in terms of classical resonances. The theory is applied to zeros of the Riemann zeta function. A striking correspondence between the associated classical dynamical zeta functions and the Riemann zeta itself is found. This induces a resurgence phenomenon where the lowest Riemann zeros appear replicated an infinite number of times as resonances and sub-resonances in the spacing autocovariances. The theoretical results are confirmed by existing “data.” The present work further extends the already well known semiclassical interpretation of properties of Riemann zeros. (shrink)

BackgroundScientific literature on posttraumatic growth after terrorist attacks has primarily focused on persons who had not been directly exposed to terrorist attacks or persons who had been directly exposed to them, but who were assessed few months or years after the attacks.MethodsWe examined long-term PTG in 210 adults directly exposed to terrorist attacks in Spain a mean of 29.6 years after the attacks. The participants had been injured by a terrorist attack or were first-degree relatives of people who had been (...) killed or injured by a terrorist attack. They completed diagnostic measures of emotional disorders and measures of PTSD and depression symptomatology, optimism, and PTG.ResultsMultiple regression analyses revealed gender differences and a positive linear relationship between PTG and cumulative trauma after the terrorist attack. Some PTG dimensions were significantly associated with PTSD symptomatology, these associations being linear, not curvilinear. However, PTG was not associated with depression symptomatology, diagnosis of emotional disorders, age, elapsed time since the attack, or optimism. In comparison with survivors assessed 18 years after the 1995 Oklahoma City bombing, Spanish victims of terrorism showed higher levels of appreciation of life, but lower levels of relating to others and spiritual change.ConclusionThe findings underscore the influence of gender on PTG and provide support to the hypothesis that some emotional distress may be a necessary condition of PTG. Future studies on PTG after terrorist attacks should take into consideration the characteristics of the terrorist attack itself and the contexts of violence and threat in which it occurred. The political, social, and cultural characteristics of the community affected by it and the profile and characteristics of other traumatic events suffered after the attack should also be taken into account in further research. (shrink)

Manuel Castells: un elogio emocional e inofensivo de las movilizaciones de protestaCuatro observaciones preliminares sirven para enmarcar una lectura crítica de la obra reciente de Manuel Castells, Redes de indignación y esperanza. En primer lugar este género de elogio exaltado e inofensivo de las movilizaciones de protesta actuales en el mundo ha dado lugar en muy poco tiempo a una amplia literatura, pero también ha suscitado no pocas críticas, ya que se trata por general de estudios y traba..

The aim of this research was to establish linear relations (association and prediction) and inferential relations between three constructs at different levels of psychological research –executive dysfunction(microanalysis),self-regulation(molecular level), andself-vs.external regulation(molar level), in the prediction of emotion regulation difficulties. We hypothesized that personal and contextual regulatory factors would be negatively related to levels of executive dysfunction and emotion regulation difficulties; by way of complement, non-regulatory and dysregulatory personal, and contextual factors would be positively related to these same difficulties. To establish relationships, (...) we used a retrospective,ex postfacto design, where 298 university students voluntarily participated by completing standardized self-reports. Linear and structural correlational, predictive analyses were performed, as well as inferential analyses. Results were consistent and validated the proposed hypotheses, for both association and prediction. The most important result refers to the discriminant value of the five-level combination heuristic for predicting Executive Function and External (contextual) Dys-Regulation. In conclusion: (1) both personal and contextual regulation factors must be analyzed in order to better understand the variation in executive functions and emotion regulation difficulties; (2) it is important to continue connecting the different levels of the constructs referring to self-regulation, given their complementary role in the behavioral analysis of regulation difficulties. (shrink)

ABSTRACTThe social content of affective stimuli has been proposed as having an influence on cognitive processing and behaviour. This research was aimed, therefore, at studying whether automatic exogenous attention demanded by affective pictures was related to their social value. We hypothesised that affective social pictures would capture attention to a greater extent than non-social affective stimuli. For this purpose, we recorded event-related potentials in a sample of 24 participants engaged in a digit categorisation task. Distracters were affective pictures varying in (...) social content, in addition to affective valence and arousal, which appeared in the background during the task. Our data revealed that pictures depicting high social content captured greater automatic attention than other pictures, as reflected by the greater amplitude and shorter latency of anterior P2, and anterior and posterior N2 components of the ERPs. In addition, social content also provoked greater allocation of processing resour... (shrink)

This article is part of a For-Discussion-Section of Methods of Information in Medicine about the paper "Biomedical Informatics: We Are What We Publish", written by Peter L. Elkin, Steven H. Brown, and Graham Wright. It is introduced by an editorial. This article contains the combined commentaries invited to independently comment on the Elkin et al. paper. In subsequent issues the discussion can continue through letters to the editor.

Ideal rods and clocks are defined as an infinitesimal symmetry of the spacetime, at least in the non-quantum case. Since no a priori geometric structure is considered, all the possible models of spacetime are obtained.

This article offers a review of the chapter dedicated by Strawson to the concept of a person in Individuals. Characteristics given to the concept of person by Strawson are criticized by Bernard Williams. What I set out to show is that this criticism can be answered by reviewing: a) how Strawson understands that the concept of a person is primitive, b) what are the implications of affirming the primitiveness of such concept, and, mainly c) what this philosopher understands by referring.

A la luz de la propuesta arendtiana de espacio público, en este artículo se analiza uno de los conceptos que más interés está despertando en el contexto de la llamada filosofía política continental: lo común. Desde una revisión comparada con la obra de C. Laval y P. Dardot enfrento los siguientes interrogantes: ¿Qué perspectivas abre la obra arendtiana en la actual reflexión sobre lo común como principio político articulador? ¿Qué nuevas cuestiones suscita la idea de espacio público como comunidad política (...) de Arendt al confrontarla con la propuesta de lo común? (shrink)

El jesuita morisco P. Ignacio de las Casas colaboró en la traducción de algunos de los libros plúmbeos encontrados en Granada a fines del siglo XVI. Inicialmente se manifestó partidario de su autenticidad, pero pronto se convenció de que eran una falsificación. Desarrolló entonces una activa lucha para conseguir que la Iglesia evitara su divulgación. En el artículo se pasa revista a su intervención como traductor y a los argumentos que utilizó para criticar la doctrina de los libros plúmbeos. El (...) P. Las Casas, además de señalar la presencia de elementos islámicos, ve en ellos claras muestras de antiguas herejías antitrinitarias. Aunque no los considera obra de moriscos, señala el atractivo que el mesianismo y milenarismo contenidos en la doctrina de los libros plúmbeos tenía para los moriscos. (shrink)

El propósito de este escrito es mostrar la complejidad de la lectura que Quevedo realiza del estoicismo, como representante del barroco hispano, en el contexto de la historia de la recepción de esta escuela antigua en los siglos XVI y XVII. Para ello retomamos la tesis de P. F. Moreau sobre las tres grandes etapas en la historia de la recepción del estoicismo (la humanista, la neoestoica y la crítica moderna) con el objetivo de aportar nuevos argumentos, extraídos del análisis (...) del miedo a la muerte y el temor de Dios en La cuna y la sepultura, que permitan precisar qué posición singular ocupa Quevedo, como representante del neoestoicismo cristianizado, en el contexto de estas tres grandes fases mencionadas. (shrink)

Jiménez Guirao, Jordi (ed.) (2021)Tres mirades sobre HegelSabadell: Edicions Enoanda, 91 p.ISBN 978-84-123469-4-7.