Endogenous BDNF is required for long-term memory formation in the rat parietal cortex

Information storage in the brain is a temporally graded process involving different memory phases as well as different structures in the mammalian brain. Cortical plasticity seems to be essential to store stable long-term memories, although little information is available at the moment regarding molecular and cellular events supporting memory consolidation in the neocortex. Brain-derived neurotrophic factor (BDNF) modulates both short-term synaptic function and activity-dependent synaptic plasticity in hippocampal and cortical neurons. We have recently demonstrated that endogenous BDNF in the hippocampus is involved in memory formation. Here we examined the role of BDNF in the parietal cortex (PCx) in short-term (STM) and long-term memory (LTM) formation of a one-trial fear-motivated learning task in rats. Bilateral infusions of function-blocking anti-BDNF antibody into the PCx impaired both STM and LTM retention scores and decreased the phosphorylation state of cAMP response element-binding protein (CREB). In contrast, intracortical administration of recombinant human BDNF facilitated LTM and increased CREB activation. Moreover, inhibitory avoidance training is associated with a rapid and transient increase in phospho-CREB/total CREB ratio in the PCx. Thus, our results indicate that endogenous BDNF is required for both STM and LTM formation of inhibitory avoidance learning, possibly involving CREB activation-dependent mechanisms. The present data support the idea that early sensory areas constitute important components of the networks subserving memory formation and that information processing in neocortex plays an important role in memory formation.     

Self-talk and affective problems in college students: valence of thinking and cognitive content specificity

The aim of this study was to develop a Self-Talk Inventory for young adults. This inventory consisted of two scales. The Negative Self-Talk Scale included three categories of self-talk (depressive, anxious, and angry thoughts) and the Positive Self-Talk Scale, three categories (minimization, positive orientation, and coping self-instructions). Participants were 982 undergraduate students (Mean age = 20.35 years, SD = 2.16). They completed the self-talk scales together with the following scales to measure symptoms of affective disorders: the Center for Epidemiological Studies Depression Scale (CES-D), the State-Trait Anxiety Inventory (STAI), and the State-Trait Anger Expression Inventory (STAXI-T). Factor analyses confirmed the hypothesized structure for the Self-Talk Inventory. The relations between self-talk and symptoms of affective disorders (depression, anxiety, and anger) were also evaluated. In general, states-of-mind -SOM- ratios and negative cognitions showed a greater association with psychological symptoms than did positive cognitions. Results concerning the cognitive characteristics of depression, anxiety, and anger were mixed and partially supported the cognitive content specificity theory.     

Individual Breaches of Environmental Laws in Cases from Public Administration Files

The characteristics of environmental transgressions and transgressors involved in 1,505 files handled by 4 public administrations were assessed. These administrations were in charge of environmental law enforcement in a highly protected setting, across federal, state, island, and municipality jurisdictions. Special attention was given to the transgressors' written responses to administrative sanctions included in the files. These were analyzed integrating the approaches of neutralization techniques and of accounts as strategies of conflict management. Results suggest that most environmental transgressions under study were carried out by private individuals in the personal domain of everyday life, and that transgressors' accounts of environmental transgressions were short, straightforward, and questioned the legitimacy of the environmental law being broken.     

Interfacial waves between two magneto-electro-elastic half-spaces with magneto-electro-mechanical imperfect interface

The propagation of shear horizontal waves between the interface of two magneto-electro-elastic materials with an magneto-electro-mechanical imperfect contact has been studied. Mechanical, electrical and magnetical imperfections are modelled by means of a spring, a capacitor and an inductor, respectively. A general expression for the dispersion relation is given in an explicit form. Some limit cases are analysed in detail. The influence of imperfect contacts is shown in some numerical results.     

Para un análisis gnoseológico de la psicología cognitiva

RESUMEN

La psicología cognitiva es, sin duda, el nombre de una de las corrientes más vigorosas de la psicología contemporánea. El presente trabajo pretende introducir en la polémica algunos conceptos gnoseológicos tomados de la Teoría del Cierre Categorial que puedan contribuir al análisis del significado (no solo histórico) de la psicología cognitiva. La Teoría del Cierre Categorial prefiere atenerse en el análisis de las ciencias en curso, a los procedimientos efectivos de ellas más que a las declaraciones de intenciones, a los prólogos metodológicos de sus cultivadores. Así este artículo se limita a analizar muy brevemente dos procedimientos usados normalmente por los psicólogos cognitivos: La utilización del “modelos computadora” y la utilización de ciertos modelos boolianos algebraicos en el análisis de la mente o de la conciencia cognitiva.     

Psicología del «efecto placebo» y fundamentos para su uso clínico intencionado

Resumen

Este es un trabajo de discusión teórica que indaga sobre la psicología del «efecto placebo» (EP) y las posibilidades de su recuperación clínica. Tiene cuatro partes.

En la primera, se exponen los resultados básicos, conforme a las pautas estándar e inversa en la ocurrencia del EP. En la segunda se revisan críticamente las explicaciones en términos de sugestión y de expectativas-atribución. En la tercera, se desarrolla una teoría interconductual, con particular referencia al condicionamiento, a la farmacología conductual y a los sistemas endorfino e inmunitario.

Finalmente, en la parte cuarta se indican diversas posibilidades teóricas y empíricas para el uso clínico intencionado del EP, tanto en medicina como en psicología clínica.     

Overt head movements moderate the effect of depressive symptoms on mood regulation

A dysfunction in the regulation of negative mood states is one of the core symptoms of depression. Research has found that levels of depression are associated with the intensity of the mood-regulation deficit. The present study aimed to explore the role the body plays in mood-regulation processes. More specifically, we studied whether head movements can influence mood persistence in dysphoric states. Subsequent to a sad-mood induction, participants were presented with a set of positive pictures immediately after performing either vertical (i.e., nodding) or lateral (i.e., shaking) head movements. We considered changes in mood from before to after the experimental task as an index of the effectiveness of mood regulation. As expected, the results showed that higher initial levels of depressive symptoms were associated with greater persistence of sad mood. More importantly, this association was present in participants who shook their heads, but not in those who nodded. These results show that body movements can contribute to mood-regulation processes, thus expanding our knowledge of the psychopathology of mood disorders.     

Rethinking Concepts in Participatory Action Research and Their Potential for Social Transformation: Post‐structuralist Informed Methodological Reflections from LGBT and Trans‐Collective Projects

Participatory Action Research (PAR) aims to articulate knowledge production and transformative action. In this paper, we outline the sociopolitical background to our interest in LGBT and trans‐collectives as an important territory where PAR might make some intervention in the social conditions of LGBT lives by transforming dominant forms of representation that have emerged from a history of psychological and medical pathology. We present two projects, from UK and Spain that utilize post‐structuralist informed methods (interviews, photo‐production, discourse analysis, narrative production) within a PAR framework. We examine their potential for problematising representations of sexuality and gender by reflecting on the knowledge produced and the transformative action they provoke. We rethink power relationships inherent in PAR concepts of ‘participation’ and ‘empowerment’ through a post‐structuralist lens and argue that the achievements of PAR projects can be better understood as ‘co‐produced artifacts’. These (e.g. photo‐exhibition) are co‐owned by community members and researchers and their deployment in different settings (e.g. community or university) impacts on the meanings they convey and the action they provoke. Finally, we argue that through the use of post‐structuralist methods PAR can enable effective transformative action, but caution against the practice of reinstating normative representations in the invitation to participate under specific identity categories (e.g. LGBT, Trans, mental health service user). PAR projects can do this by considering naturalized definitions of who is vulnerable or marginalized as the object and field of social transformation, and the starting point for collective and political action. Copyright © 2012 John Wiley & Sons, Ltd.     

The role of inhibition in young children’s altruistic behaviour

By behaving altruistically, individuals voluntarily reduce their benefits in order to increase their partners’. This deviation from a self-interest-maximizing function may be cognitively demanding, though. This study investigates whether altruistic sharing in 4- to 6-year-old children, assessed by a dictator game (DG), is related to three measures of executive functioning, that is, inhibitory control, working memory, and cognitive flexibility. We found that children who turned out to be altruistic in the DG performed better on an inhibition task than non-altruists did. This finding lends support to the hypothesis that altruistic sharing might be somewhat constrained by the child’s ability to inhibit a natural tendency to preserve his or her own resources. Much research is needed to understand the role of inhibitory control in the development of costly sharing and the consolidation of inequity aversion.