Sistemas neurales de relevancia en el contexto de la psicobiología de la ansiedad: una revisión

Resumen

La ansiedad es un estado emocional central de características muy complejas que, al menos en términos de respuesta, se asemeja en gran medida al miedo. En las ültimas décadas, estudios neurobiológicos y psicobiológicos han identificado numerosas estructuras y circuitos cerebrales estrechamente relacionados con este tipo de respuestas, así como con el estado central característico. Destacan, por su especial relevancia, el sistema límbico (incluyendo el sistema septohipocampal, la amígdala y el hipotálamo posterior) y los sistemas monoaminérgicos ascendentes (principalmente de serotonina y norepinefrina), lugares donde, además, las sustancias ansiolíticas podrían ejercer su efecto terapéutico. El principal objetivo del presente trabajo es revisar la precisa implicación de estos sistemas neurales en la modulación de ese estado emocional definido como ansiedad.     

The time course of resource allocation in spider-fearful participants during fear reactions

The dynamics of resource allocation to pictures of spiders and other animals in spider-fearful participants was investigated. The task of the participants was to respond rapidly and accurately to various probe stimuli superimposed on pictures of different animals. These were arguably fear relevant (spiders, snakes, and wolves) and fear irrelevant (beetles, turtles, and rabbits). The probes were shown with different stimulus onset asynchronies (SOAs) from picture onset to address the dynamics of resource allocation. A larger allocation of resources to spider pictures than to pictures of all other animals, with no difference between the latter regarding resource allocation was found. For the task that demanded more resources the fear-related physiological responses decreased, suggesting that controlled processing modulates fear responses.     

Is Established Knowledge About Cross-Cultural Differences in Individualism–Collectivism Not Applicable to the Military? A Multi-Method Study of Cross-Cultural Differences in Behavior

Preparing for international military collaboration includes raising knowledge about cultural differences. The differences in individualism–collectivism between countries are among the most central aspects likely to impact collaboration. However, are the differences in individualism–collectivism between countries as documented in a significant amount of civilian research (e.g., Hofstede, 2001a Hofstede, G. (2001a). Culture’s consequences: Comparing values, behaviors, institutions, and organizations across nations (2nd ed.). Thousand Oaks, CA: Sage. [Google Scholar]) generalizable to a military context? Or are the differences not the same in a military context, as suggested by Soeters (1997) Soeters, J. L. (1997). Value orientations in military academies: A thirteen country study. Armed Forces and Society, 24, 7–32. 10.1177/0095327X9702400101[Crossref], [Web of Science ®] , [Google Scholar] on the bases of a values survey? Quasi-experiments were conducted in a distributed collaborative computer game environment. The study is multimethod, employing self-reporting, observer ratings and direct behavioral measures, and it is the first study of cross-cultural differences in individualism–collectivism in behavior in a military context. By studying differences in collectivist-type behaviors in a sample of military officers (N = 154) in 4 different countries (the United States, the Netherlands, Sweden, and Norway), this study seeks to determine whether the cross-cultural differences in values found by Soeters from a military context are reflected in behavior. The study also includes a values survey using Hofstede’s (2007) Hofstede, G. (2007). Values survey module 1994 (VSM-94). Retrieved from www.geerthofstede.com [Google Scholar] measurement tool, the Values Survey Module (VSM), consistent with Soeters’ study. The study is considered exploratory because of a somewhat limited sample. The results from the 6 different measures of collectivist behaviors provide no support for the suggestion that cross-cultural differences in individualism–collectivism are not the same in military organizations as in civilian organizations. Although not conclusive, the results raise doubt concerning the appropriateness of using the VSM in military samples. The implications are discussed.     

Psychometric properties of the Norwegian version of the Childhood Trauma Questionnaire in high‐risk groups

The Childhood Trauma Questionnaire ‐ Short Form (CTQ‐SF) is widely used to measure childhood abuse of all types. In the present study, we examined the psychometric properties of the Norwegian version of the instrument. The participants constituted four subsamples (n = 517): substance abusers (n = 126), psychiatric patients (n = 210), prisoners (n = 109) and adolescents in out‐of‐home placements (n = 72). Confirmatory factor analysis revealed a reasonable fit of the data to the original five‐factor structure of the CTQ‐SF. Measurement invariance was found across gender and the four subsamples. It was concluded that the Norwegian version of the CTQ‐SF has acceptable psychometric properties, with good reliability and satisfactory accuracy, to assess different dimensions of childhood trauma.     

Formulating deflationism

I here argue for a particular formulation of truth-deflationism, namely, the propositionally quantified formula, (Q) “For all p, ${\langle \text{p}\rangle}$ is true iff p”. The main argument consists of an enumeration of the other (five) possible formulations and criticisms thereof. Notably, Horwich’s Minimal Theory is found objectionable in that it cannot be accepted by finite beings. Other formulations err in not providing non-questionbegging, sufficiently direct derivations of the T-schema instances. I end by defending (Q) against various objections. In particular, I argue that certain circularity charges rest on mistaken assumptions about logic that lead to Carroll’s regress. I show how the propositional quantifier can be seen as on a par with first-order quantifiers and so equally acceptable to use. While the proposed parallelism between these quantifiers is controversial in general, deflationists have special reasons to affirm it. I further argue that the main three types of approach the truth-paradoxes are open to an adherent of (Q), and that the derivation of general facts about truth can be explained on its basis.     

Luther as a reader of Dionysius the Areopagite

Dionysius the Areopagite has been an important point of orientation for the debate on how humans appropriately approach God. Among his avid readers is Martin Luther, whose understanding of Dionysius is investigated in this article. Luther is a critical reader, but his criticism is founded on a basic identification with Dionysius' central tenets. His main objection is that he finds Dionysius too theoretical. For Luther, God is incessant activity; the question of approaching God correctly therefore for Luther is an existential question. This is an aspect he does not find adequately integrated in Dionysius' apophatic dialectics. Luther also found faults with Dionysius' Christology. For Luther, the experience of not being properly related to God is a terrifying experience. This can be read as a reinterpretation of Dionysius' Mystical Theology, showing both influence (Luther knew this work almost by heart) and independence. Central aspects of Luther's thought thus present themselves as a reinterpretation of Dionysian mysticism.     

Xenophobia and Tolerance Toward Immigrants in Adolescence: Cross-Influence Processes Within Friendships

To what extent do adolescents and their friends socialize each others’ attitudes toward immigrants? Can friends’ positive attitudes toward immigrants counter adolescents’ negative attitudes toward immigrants, and do friends’ negative attitudes decrease adolescents’ positive attitudes? These questions were examined by following a large (N?=?1,472) friendship network of adolescents (49.2 % girls; M _age?=?13.31 at first measurement) across three annual measurements. Selection and influence processes regarding tolerance and xenophobia were distinguished with longitudinal social network analyses, controlling for effects of age, gender, and immigrant background. Findings showed that friends’ tolerance predicted increases in adolescents’ tolerance and friends’ xenophobia predicted increases in adolescents’ xenophobia. Moreover, friends’ tolerance predicted a lower likelihood of adolescents’ xenophobia increasing. The current results suggest that interventions should distinguish between tolerance and xenophobia, as these appear to represent two separate dimensions that are each influenced in specific ways by friends’ tolerance and xenophobia.     

RICOEUR'S PHILOSOPHY AND ITS IMPLICATIONS FOR PSYCHOANALYSIS

In differentiation of early and mature shame, the phenomenological content of shame changes with the development of a stable self-state. In this hypothesis, early shame refers to a person's dependence upon mirroring himself and in being mirrored by an outer object, while mature shame refers to introspection and self-reflection. From a developmental psychological point of view, the connection between self-development and mirroring is expounded. Mirroring is defined as a psychic dialectic process between the inner psychic reality and the outer reality. Early shame is connected to dyadic mirroring, which refers to attachment and empathy. Mature shame is connected to triadic mirroring, which refers to separation and reflection. Early shame emerges from discrepancies between the infant's expectations of a complementary affective response and the mother's response, and is defined as an early marker of differences in the mother/infant unit. It is argued that early shame in smaller ‘doses’ has a regulating function on self-development by maintaining the psychic dialectic process, while in larger ‘doses’, it has a disturbing effect on the self-development, resulting in pathological shame. In the therapeutic process, early shame appears as shame scenarios illustrated in the text by a clinical vignette.     

Can the eyes reveal a person’s emotions? Biasing role of the mouth expression

In this study we investigated how perception of the eye expression in a face is influenced by the mouth expression, even when only the eyes are directly looked at. The same eyes appeared in a face with either an incongruent smiling, angry, or sad mouth, a congruent mouth, or no mouth. Attention was directed to the eyes by means of cueing and there were no fixations on the mouth. Participants evaluated whether the eyes were happy (or angry, or sad) or not. Results indicated that the smile biased the evaluation of the eyes towards happiness to a greater extent than an angry or a sad mouth did towards anger or sadness. The smiling mouth was also more visually salient than the angry and the sad mouths. We conclude that the role of the eyes as a “window” to a person’s emotional and motivational state is constrained and distorted by the configural projection of an expressive mouth, and that this effect is enhanced by the high visual saliency of the smile.     

Facilitation and interference of behavioral responses by task-irrelevant affect-laden stimuli

Emotional interference on behavior is commonly observed when task-irrelevant negative stimuli appear before behavioral targets. One explanation postulates that affect-laden stimuli readily capture attention, interfering with the processing of the upcoming target. Emotional stimuli might also preactivate motor programs incompatible with the demanded response. Using a cued go/no-go procedure we showed that task-irrelevant unpleasant stimuli cause interference or facilitation depending on their onset asynchrony relative to the target. We observed interference with short (200 ms) stimulus-target asynchronies and facilitation for longer ones (600 ms), both for key press (Experiment 1) and key release (Experiment 2) responses. The interference effect is compatible with an attentional explanation, but the behavioral facilitation is hard to accommodate within either attentional or motor accounts. This interference-facilitation pattern can be explained assuming that once the attentional effect subsides, emotional processing may enhance the perceptual processing of the stimuli, or lower the decision threshold, thereby facilitating the response selection process.