Conditional self-discrimination enhances dendritic spine number and dendritic length at prefrontal cortex and hippocampal neurons of rats.

We studied conditional self-discrimination (CSD) in rats and compared the neuronal cytoarchitecture of untrained animals and rats that were trained in self-discrimination. For this purpose, we used thirty 10-week-old male rats were randomized into three groups: one control group and two conditioning groups: a comparison group (associative learning) and an experimental group (self-discrimination). At the end of the conditioning process, the experimental group managed to discriminate their own state of thirst. After the conditioning process, dendritic morphological changes in the pyramidal neurons of the prefrontal cortex and CA1 region of the dorsal hippocampus were evaluated using Golgi-Cox stain method and then analyzed by the Sholl method. Differences were found in total dendritic length and spine density. Animals trained in self-discrimination showed an increase in the dendritic length and the number of dendritic spines of neurons of the prefrontal cortex and CA1 region of the dorsal hippocampus. Our data suggest that conditional self-discrimination improves the connectivity of the prefrontal cortex and dorsal CA1, which has implications for memory and learning processes.

[Burnout syndrome in medical and obstetric perception of violence]. / Síndrome de desgaste profesional en médicos y percepción de la violencia obstétrica.

BACKGROUND: Obstetric violence involves a violation of reproductive rights of women during pregnancy, childbirth and postpartum. It has been associated with lack of empathy and emotional discomfort of physicians. OBJECTIVE: To identify the perceptions of obstetric violence and to determine the possible relationship with burnout syndrome. MATERIAL AND METHODS: We evaluated 29 physicians whose scope of work relates to obstetrics and gynecology. The evaluation instruments were: a) questionnaire on professional perception that collects demographic information, situations of perceived obstetric violence, major concerns of physicians in their professional work, and includes an scale about level of job satisfaction, b) the Maslach Burnout inventory, and c) Jefferson Scale of Physician Empathy. RESULTS: The most prevalent obstetric violence situations perceived were: medical malpractice and harmful practices (10/29), discrimination (10/29), rude treatment and verbal attacks (11/29). Seventeen participants reported lack of information on obstetric violence and not have tools to cope with this problem. Regarding the burnout syndrome, it was associated with several items of the scale of empathy and with the scale of job satisfaction. CONCLUSIONS: This study shows the importance of providing knowledge and tools to deal with obstetric violence and stress management to prevent such situations on medical practices.

Development and psychometric properties of a self-medication behavior inventory.

Introduction: Self-medication is a prevalent behavior with significant health implications. Understanding its psychosocial determinants can inform preventative strategies and interventions. Methods: We evaluated the psychometric properties of the Self-Medication Behavior Inventory (SMBI-9) in a binational study with 779 Colombian and Mexican participants. Concurrent validity was assessed through correlations with related inventories, and confirmatory factor analysis tested the proposed four-factor model. Results: The SMBI-9 demonstrated high model fit (CFI = 0.995, TLI = 0.991) and invariance across countries. The factors-Social Influence, Attitude toward Medicine, Avoidance, and Prevention-varied significantly with knowledge of medicine, schooling, health insurance status and gender, underscoring the role of social and personal beliefs in self-medication practices. Discussion: SMBI-9 emerged as a reliable tool for capturing the multifaceted nature of self-medication behaviors. Findings highlight the influence of social norms and personal attitudes, suggesting targeted approaches for behavioral interventions.

Mirror neurons and empathy-related regions in psychopathy: Systematic review, meta-analysis, and a working model.

Mirror neurons have been associated with empathy. People with psychopathic traits present low levels of empathy. To analyze this, a systematic review of fMRI studies of people with psychopathic traits during an emotional facial expression processing task was performed. The regions of interest were structures associated with the mirror neuron system: ventromedial prefrontal cortex (vmPFC), inferior parietal lobe (IPL), inferior frontal gyrus and superior temporal sulcus. The analysis was also extended to structures related to affective empathy (insula, amygdala and anterior cingulate cortex) and to two more emotional processing areas (orbitofrontal cortex and fusiform gyrus). Hypoactivation was more frequently observed in regions of the mirror neuron system from people with high psychopathic traits, as well as in the emotional processing structures, and those associated with affective empathy, except for the insula, where it presented higher activity. Differences were observed for all types of emotions. The results suggest that the mirror neuron system is altered in psychopathy and their relationship with affective empathy deficits is discussed.

Development and Validation of a Brief Scale of Vengeful Tendencies (BSVT-11) in a Mexican Sample.

The development and analysis of psychometric properties of a brief scale that assesses vengeful tendencies (BSVT-11) is presented. A three-dimensional model is proposed: (1) resentment, (2) planning of revenge, and (3) justification of revenge. Two studies were conducted for this purpose: one was carried out with a sample of 478 participants, to evaluate the content validity, factorial structure, reliability, and invariance of the instrument; the other was conducted with a sample of 308 participants, to determine the concurrent validity of the BSVT-11. The data indicated adequate reliability (ω = 0.877), optimal fit (CFI = 1.0, TLI = 1.0) according to the dimensions proposed, and invariance between genders (p = 0.893). Concurrent validity data yield significant correlation values (p < 0.001) ranging from 0.522 to 0.804 in the analyses between the BSVT and other scales. The results allow us to present a brief instrument with good psychometric properties with possibilities for use in basic and translational science.

Development and Validation of a Questionnaire to Assess Creative Potential Traits.

The aim of the study was to develop an inventory to assess traits of creative potential and to analyze its psychometric properties. Three dimensions that could be associated with creative potential were proposed: willingness to transgress, willingness to take on challenges, and willingness to explore. For this purpose 551 participants were chosen to respond to an inventory composed of 12 items: Traits of Creative Potential Questionnaire, (TCPQ-12) and other tests to determine concurrent validity. The correlations between these instruments were significant. In addition, the instrument showed adequate internal consistency (Ω = 0.813) and the exploratory factor analysis yielded salient factors coincident with the proposed dimensions. The confirmatory factor analysis indicated an optimal fit (CFI = 0.984, TLI = 0.979, GFI = 0.963, RMSEA = 0.035). with composite reliability (CR) values > 0.70 in two factors and in one was slightly lower (CR = 0.684). The average variance extracted (AVE) was > 0.5 in two factors and in one < 0.5. The study data allow to highlight that the instrument presented here is a concise instrument with adequate psychometric properties.

Psychometric Properties and Development of a Scale Designed to Evaluate the Potential of Predatory Violent Behavior.

The objective of this study was to develop and determine the psychometric properties of an instrument designed to detect traits and behavior that are associated with predatory violent behavior, which is defined as a determined, planned, controlled, and proactive aggression. The sample was comprised of 564 students, mostly in their last year of high school, or in their first year of college. The initial instrument had 78 items, ultimately resulting in 13 with good internal consistency (α = 0.825). Factor analysis showed four factors: anger-in, appeal for weapons, suicidal ideation, and the tendency to take justice into one's own hands. Said factors showed significant correlations of convergent validity. Data shown here allows inferring that the instrument is a novel and concise tool that evaluates and detects the potential of predatory violent behavior.

Avian Emotions: Comparative Perspectives on Fear and Frustration.

Emotions are complex reactions that allow individuals to cope with significant positive and negative events. Research on emotion was pioneered by Darwin's work on emotional expressions in humans and animals. But Darwin was concerned mainly with facial and bodily expressions of significance for humans, citing mainly examples from mammals (e.g., apes, dogs, and cats). In birds, emotional expressions are less evident for a human observer, so a different approach is needed. Understanding avian emotions will provide key evolutionary information on the evolution of related behaviors and brain circuitry. Birds and mammals are thought to have evolved from different groups of Mesozoic reptiles, theropod dinosaurs and therapsids, respectively, and therefore, their common ancestor is likely to be a basal reptile living about 300 million years ago, during the Carboniferous or Permian period. Yet, birds and mammals exhibit extensive convergence in terms of relative brain size, high levels of activity, sleep/wakefulness cycles, endothermy, and social behavior, among others. This article focuses on two basic emotions with negative valence: fear and frustration. Fear is related to the anticipation of dangerous or threatening stimuli (e.g., predators or aggressive conspecifics). Frustration is related to unexpected reward omissions or devaluations (e.g., loss of food or sexual resources). These results have implications for an understanding of the conditions that promote fear and frustration and for the evolution of supporting brain circuitry.

Propiedades psicométricas del Work Preference Inventory (WPI) en una muestra de adultos jóvenes mexicanos / Psychometric properties of the Work Preference Inventory (WPI) in a sample of young Mexican adults

Resumen El presente trabajo analiza las propiedades psicométricas del Work Preference Inventory (WPI; Amabile, Hill, Hennessey & Tighe, 1994) traducido al español, en una muestra de 762 participantes mexicanos de entre 17 y 27 años. La consistencia interna del instrumento indica un alfa de Cronbach general de 0.72, así como de 0.71 para la escala de motivación intrínseca y de 0.69 para la de motivación extrínseca. Se realizaron análisis factoriales para agrupar los reactivos en dos escalas primarias y cuatro secundarias. Además, se hizo la baremación a partir de la muestra estudiada. Los resultados indican que el WPI es un instrumento válido y confiable para medir la motivación en poblaciones universitarias.

Abstract In the present study was analyzed the psychometric properties of the Work Preference Inventory (WPI; Amabile, Hill, Hennessey & Tighe, 1994) translated into Spanish, in a sample of 762 Mexican participants between 17 and 27 years old. The internal consistency of the instrument indicates a general Cronbach alpha of 0.72, as well as 0.71 and 0.69 for intrinsic and extrinsic motivation scales, respectively. Factor analyzes were performed to pool the items in two primary and four secondary scales. In addition, the norms were developed ​​from the study sample. The results indicate that the WPI is a valid and reliable instrument to measure motivation in college populations.