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1.
Eur Eat Disord Rev ; 32(5): 930-942, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-38722045

RESUMEN

OBJECTIVE: Eating disorders (ED) have recently been studied from a network approach, conceptualising them as a complex system of interconnected variables, while highlighting the role of non-ED symptoms and personality dimensions. This study aims to explore the connections between personality and ED symptoms, identify central nodes, and compare the EDs network to a healthy control network. METHODS: We employed network analysis to examine the personality-ED symptom connections in 329 individuals with an ED diagnosis and 192 healthy controls. We estimated a regularised partial correlation network and the indices of centrality and bridge centrality to identify the most influential nodes for each group. Network differences between groups were also examined. RESULTS: Low Self-Directedness and high Harm avoidance emerged as central bridge nodes, displaying the strongest relationship with ED symptoms. Both networks differed in their global connectivity and structure, although no differences were found in bridge centrality and centrality indices. CONCLUSIONS: These findings shed light on the role of personality dimensions, such as Self-Directedness and Harm Avoidance in the maintenance of ED psychopathology, supporting the transdiagnostic conceptualisation of ED. This study advances a deeper understanding of the complex interplay between personality dimensions and ED symptoms, offering potential directions for clinical interventions.


Asunto(s)
Trastornos de Alimentación y de la Ingestión de Alimentos , Personalidad , Humanos , Trastornos de Alimentación y de la Ingestión de Alimentos/psicología , Femenino , Personalidad/fisiología , Adulto , Masculino , Adulto Joven , Adolescente , Estudios de Casos y Controles
2.
Psychol Sci ; 34(7): 834-848, 2023 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-37260038

RESUMEN

Two preregistered studies from two different platforms with representative U.S. adult samples (N = 1,865) tested the harm-hypervigilance hypothesis in risk assessments of controversial behavioral science. As expected, across six sets of scientific findings, people consistently overestimated others' harmful reactions (medium to large average effect sizes) and underestimated helpful ones, even when incentivized for accuracy. Additional analyses found that (a) harm overestimations were associated with support for censoring science, (b) people who were more offended by scientific findings reported greater difficulty understanding them, and (c) evidence was moderately consistent for an association between more conservative ideology and harm overestimations. These findings are particularly relevant because journals have begun evaluating potential downstream harms of scientific findings. We discuss implications of our work and invite scholars to develop rigorous tests of (a) the social pressures that lead science astray and (b) the actual costs and benefits of publishing or not publishing potentially controversial conclusions.


Asunto(s)
Ciencias de la Conducta , Censura de la Investigación , Adulto , Humanos , Ansiedad , Estados Unidos , Medición de Riesgo , Conocimiento
3.
J Sleep Res ; : e13972, 2023 Jun 21.
Artículo en Inglés | MEDLINE | ID: mdl-37345305

RESUMEN

Research indicated that patients suffering from nightmares are often undertreated. One reason for this gap is that nightmare sufferers themselves often have not sought professional help for their nightmares, and-if they did-it was not very helpful. The current study aimed at studying trait factors (personality, harm avoidance) in relation to the persons considering seeking professional help. In a population-sample of 1108 persons (712 women, 396 men) with a mean age of 50.55 ± 14.22 years, it was also found that only some of the persons who have problems with nightmares even considered seeking professional help as an option. As expected and after controlling for effects of nightmare frequency, persons with high harm avoidance and high introversion were more likely not seeking help for their problems with nightmares. The associations with low education, low agreeableness and low conscientiousness with considering seeking professional help might point to the fear of stigmatisation in nightmare sufferers. Interestingly, the association between harm avoidance and "Considering seeking professional help" was even stronger in the subsample of frequent nightmare sufferers (once a week or more often). Future efforts should aim at findings new ways to offer adequate help for nightmares and increase the knowledge about nightmare treatment in healthcare professionals.

4.
Hum Brain Mapp ; 43(10): 3176-3183, 2022 07.
Artículo en Inglés | MEDLINE | ID: mdl-35332975

RESUMEN

As the previous studies have mainly focused on the reward system and the corresponding brain regions, the relationship between brain morphology and excessive internet use (EIU) were not clear; the purpose of the study was to investigate if the brain regions other than the reward system were associated with EIU. Data were acquired from 131 excessive internet users. Psychological measures included internet use, life quality, personality, mental illness symptoms, impulsivity, and thought suppression. The brain was scanned with 3T magnetic resonance imaging (MRI) and six types of brain morphological indexes were calculated. Lasso regression methods were used to select the predictors. Stepwise linear regression methods were used to build the models and verify the model. The variables remaining in the model were left precentral (curve), left superior temporal (surface area), right cuneus (folding index), right rostral anterior cingulate (folding index), and harm avoidance. The independent variable was the EIU score of the worst week in the past year. The study found that the brain morphological indexes other than the reward system, including the left precentral (curve), the left superior temporal (surface area), the right cuneus (folding index), and the right rostral anterior cingulate (folding index), can predict the severity of EIU, suggesting an extensive change in the brain. In this study, a whole-brain data analysis was conducted and it was concluded that the changes in certain brain regions were more predictive than the reward system and psychological measures or more important for EIU.


Asunto(s)
Uso de Internet , Imagen por Resonancia Magnética , Encéfalo/diagnóstico por imagen , Humanos , Conducta Impulsiva , Internet , Imagen por Resonancia Magnética/métodos , Recompensa
5.
BMC Psychiatry ; 22(1): 832, 2022 12 27.
Artículo en Inglés | MEDLINE | ID: mdl-36575407

RESUMEN

BACKGROUND: Up to now several subtypes of social anxiety disorder (SAD) have been proposed. METHODS: In the present study, we used a cluster analytic approach to identify qualitatively different subgroups of SAD based on temperament characteristics, that is, harm avoidance (HA) and novelty seeking (NS) dimensions of Cloninger's Temperament and Character Inventory. RESULTS: Based on a large, diverse clinical sample (n = 575), we found evidence for two distinct subgroups of SAD: a larger (59%) prototypic, inhibited cluster characterized by high HA and low NS, and a smaller atypic, and comparatively more impulsive cluster characterized by medium to high HA and increased NS. The subgroups differed regarding a variety of sociodemographic and clinical variables. While the prototypic SAD subtype suffered from more severe SAD and depressive symptoms, suicidal ideation, and reduced social functioning, the atypic NS subtype showcased higher reproductive behaviour, self-directedness and -transcendence, comparatively. Additional hierarchical logistic regression highlights the contribution of age and education. CONCLUSIONS: Our results valuably extend previous evidence for the existence of at least two distinct subtypes of SAD. A better knowledge of the characteristic differences in prototypic behaviour, personality, coping strategies and comorbidities between the identified (and further) subtypes can contribute to the development of effective prevention interventions and promotes the conceptualization of tailored treatments.


Asunto(s)
Fobia Social , Adulto , Humanos , Conducta Exploratoria , Personalidad , Trastornos de la Personalidad/diagnóstico , Temperamento , Carácter , Inventario de Personalidad
6.
Arch Womens Ment Health ; 25(4): 693-703, 2022 08.
Artículo en Inglés | MEDLINE | ID: mdl-35732898

RESUMEN

The aim of our study was to examine whether there are sex-based differences in the relationship between personality traits and hypothalamic-pituitary-adrenal (HPA) axis measures. A total of 106 healthy volunteers (56.6% women; age: 48.0 ± 15.8 years) were studied. The revised temperament and character inventory (TCI-R) and the Childhood Trauma Questionnaire (CTQ) were administered. HPA axis function was assessed using three dynamic measures: the cortisol awakening response (CAR), the diurnal cortisol slope, and the cortisol suppression ratio with 0.25 mg of dexamethasone (DSTR). Female sex was associated with an increased CAR and a more flattened diurnal cortisol slope, although a negative significant interaction between harm avoidance and female sex was found. Regarding the DSTR, perseverance was associated with increased cortisol suppression after dexamethasone; sex did not affect this association. Our study suggests that the relationship between specific personality traits (harm avoidance) and HPA axis measures (CAR, diurnal slope) differs according to sex.


Asunto(s)
Sistema Hipotálamo-Hipofisario , Sistema Hipófiso-Suprarrenal , Adulto , Dexametasona , Femenino , Humanos , Hidrocortisona , Masculino , Persona de Mediana Edad , Personalidad , Saliva
7.
Eur Eat Disord Rev ; 30(4): 388-400, 2022 07.
Artículo en Inglés | MEDLINE | ID: mdl-35368118

RESUMEN

OBJECTIVE: Although personality traits have been found to be associated with body dissatisfaction for women in the general population, little research has explored these associations for people with eating disorders. Furthermore, it is unknown whether these associations are direct or are mediated by other factors. In this cross-sectional study, secondary analyses of data from two clinical trials were conducted to determine which personality dimensions contributed to body dissatisfaction in women with bulimia nervosa, and whether low self-esteem and depression mediate these associations independently or in serial. METHOD: Participants were 193 women with bulimia nervosa. Participants completed self-report measures of temperament and character, body dissatisfaction, low self-esteem, and depression before receiving treatment for their eating disorder. RESULTS: The temperament dimension, harm avoidance, contributed significantly to body dissatisfaction. Serial mediation analyses showed this association was fully mediated, revealing two significant indirect effects. The first was through low self-esteem and the second through depression and low self-esteem in serial. CONCLUSIONS: Findings suggest body dissatisfaction in women with bulimia nervosa may be indirectly targeted through addressing harm avoidance, depression and low self-esteem.


Asunto(s)
Insatisfacción Corporal , Bulimia Nerviosa , Estudios Transversales , Depresión , Femenino , Humanos , Temperamento
8.
Am J Geriatr Psychiatry ; 29(5): 488-498, 2021 05.
Artículo en Inglés | MEDLINE | ID: mdl-33046355

RESUMEN

OBJECTIVE: A wealth of evidence has linked purpose in life (PiL) to better mental and physical health and healthy aging. Here, the authors aimed to determine important correlates of PiL using a machine learning approach. METHODS: Participants were recruited from retirement communities by the Rush Memory and Aging Project and assessed for childhood experience, adulthood sociodemographic factors (e.g., education, income, marital status), lifestyle and health behavior (e.g., cognitively stimulating activities, exercise, social activities, social network size), psychological factors (e.g., depression, loneliness, perceived discrimination, perceived social support), personality traits (e.g., PiL, harm avoidance), and medical conditions. Elastic Net was implemented to identify important correlates of PiL. RESULTS: A total of 1,839 participants were included in our analysis. Among the 23 variables provided to Elastic Net, 10 were identified as important correlates of PiL. In order of decreasing effect size, factors associated with lower PiL were loneliness, harm avoidance, older age, and depressive symptoms, while those associated with greater PiL were perceived social support, more social activities, more years of education, higher income, intact late-life cognitive performance, and more middle-age cognitive activities. CONCLUSION: Our findings identify potentially important modifiable factors as targets for intervention strategies to enhance PiL.


Asunto(s)
Envejecimiento Saludable , Soledad , Adulto , Anciano , Envejecimiento , Humanos , Aprendizaje Automático , Apoyo Social
9.
Pediatr Int ; 63(2): 177-182, 2021 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-32745364

RESUMEN

BACKGROUND: Nevoid basal cell carcinoma syndrome (NBCCS) is a neurocutaneous disease, characterized by tumorigenesis and developmental anomalies due to aberrant sonic hedgehog (Shh) signaling. Patients with NBCCS typically appear calm and carefree, suggesting that a specific personality in these patients may be associated with an enhanced hedgehog pathway. Our study aimed to determine the personality type in these patients. METHODS: We enrolled 14 mentally normal patients with genetically confirmed NBCCS (seven males and seven females; mean age = 25.2 years) and 20 controls (10 males and 10 females; mean age = 27.9 years). The patients were assessed with the Japanese version of the Temperament and Character Inventory, based on the seven-dimensional model of temperament and character, and their clinical symptoms were evaluated. The amygdala volumes of six patients with NBCCS were measured using magnetic resonance imaging with image-processing software. RESULTS: Patients with NBCCS scored significantly lower on harm avoidance (0.89) than controls (1.00; P = 0.0084). Moreover, patients with NBCCS and developmental malformations such as rib anomalies, who may have experienced Shh signaling enhancement from the prenatal period, scored significantly lower on harm avoidance (0.80 [P = 0.0031]). The left amygdala volume was also significantly reduced in patients with NBCCS (P = 0.0426). CONCLUSIONS: Patients with NBCCS who experienced increased Shh signaling from the prenatal period showed significantly lower harm avoidance related to serotonin. The left amygdala volume was significantly reduced in these patients. Our results indicate that Shh signaling may influence the human personality.


Asunto(s)
Síndrome del Nevo Basocelular , Carcinoma Basocelular , Adulto , Síndrome del Nevo Basocelular/diagnóstico , Femenino , Proteínas Hedgehog , Humanos , Masculino , Transducción de Señal , Temperamento
10.
Pers Individ Dif ; 182: 111090, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-36540872

RESUMEN

The COVID-19 pandemic forced the worldwide introduction of containment measures. This emergency scenario produced a conflict between personal freedom and public health, highlighting differences in individual behaviours influenced by psychological traits and moral considerations. In this context, a detailed characterisation of the psychological variables predicting adherence to containment measures is crucial to enhance public awareness and compliance. During the first virus outbreak in Italy, we assessed whether adherence to government measures was explained by the interacting effects of personality traits and moral dispositions. Through an online questionnaire, we collected data on individual endogenous variables related to personality traits, locus of control, and moral dispositions, alongside the tendency to breach the lockdown for outdoor physical activity. The results showed that individual measures of novelty-seeking, harm-avoidance and authority concerns interacted in driving the adherence to the national lockdown: MFQ-Authority moderated the facilitatory effect of novelty-seeking on lockdown violation, but this moderation was itself moderated by higher TCI-harm-avoidance. By assessing a model forecasting the likelihood of violating restrictive norms, these findings show the potential of personality and moral foundation assessments in informing prevention policies and emergency interventions by political and scientific institutions.

11.
Child Psychiatry Hum Dev ; 52(5): 957-965, 2021 10.
Artículo en Inglés | MEDLINE | ID: mdl-33044664

RESUMEN

In an effort to improve patient conceptualization and targeted treatment, researchers have sought to accurately classify OCD subtypes. To date, the most common form of OCD classification has used the content of symptom topography as opposed to functional links between symptoms to categorize OCD. The aim of the current study was to explore the associations between these two forms of OCD classification. Participant topographical symptoms were self-reported using the Obsessive-Compulsive Inventory-Child Version (OCI-CV). Clinicians assessed whether participant symptoms were motivated by harm avoidance and/or incompleteness. Structural equation modeling was employed to explore the associations between harm avoidance and incompleteness and symptom dimensions in youth with OCD. Results showed that harm avoidance was significantly associated with doubting/checking, obsessing, and neutralizing symptoms, whereas incompleteness was associated with doubting/checking, ordering, and neutralizing symptoms. Findings are consistent with child and adult literature and highlight the importance of assessing the underlying function of OC behaviors.


Asunto(s)
Motivación , Trastorno Obsesivo Compulsivo , Adolescente , Adulto , Emociones , Reducción del Daño , Humanos , Trastorno Obsesivo Compulsivo/diagnóstico , Autoinforme
12.
Eat Weight Disord ; 26(4): 1139-1147, 2021 May.
Artículo en Inglés | MEDLINE | ID: mdl-32948998

RESUMEN

PURPOSE: Resilience can be defined as the ability to maintain health in the face of adversity. Resilience has been associated with personality traits. Personality traits in the context of Eating Disorders (ED) have also been examined. However, the relationship between resilience and personality profile in patients with ED has not been studied. The aim of this study is to investigate whether personality dimensions impact on resilience, in patients with ED, compared to healthy participants. METHODS: Connor and Davidson resilience scale, as a measure of resilience and temperament-character inventory, as a measure of personality dimensions, were completed by 100 participants: 50 (50%) healthy University students (controls subgroup) and 50 (50%) patients with ED, matched on age and gender. RESULTS: Patients with ED showed lower resilience than healthy participants and scored higher on harm avoidance, and lower on reward dependence, self-directedness and cooperativeness than controls. Lower harm avoidance, higher persistence and higher self-directedness were associated with resilience in both subgroups. Self-directedness and persistence predicted resilience in both subgroups. Only Harm Avoidance predicted resilience in patients' subgroup. CONCLUSION: To our knowledge, there are no existing data examining the effect of personality dimensions in resilience, in the context of ED. We found that only the effect of Harm Avoidance in resilience was different among the participants' subgroups. In conclusion, Harm Avoidance could explain differences in resilience between healthy participants and patients with ED. LEVEL OF EVIDENCE: Level III: case-control analytic study.


Asunto(s)
Carácter , Trastornos de Alimentación y de la Ingestión de Alimentos , Humanos , Personalidad , Trastornos de la Personalidad , Inventario de Personalidad , Temperamento
13.
Psychol Sci ; 31(10): 1294-1301, 2020 10.
Artículo en Inglés | MEDLINE | ID: mdl-32900283

RESUMEN

Past research suggests that actors often seek to minimize harm at the cost of maximizing social welfare. However, this prior research has confounded a desire to minimize the negative impact caused by one's actions (harm aversion) with a desire to avoid causing any harm whatsoever (harm avoidance). Across six studies (N = 2,152), we demonstrate that these two motives are distinct. When decision-makers can completely avoid committing a harmful act, they strongly prefer to do so. However, harming cannot always be avoided. Often, decision-makers must choose between committing less harm for less benefit and committing more harm for more benefit. In these cases, harm aversion diminishes substantially, and decision-makers become increasingly willing to commit greater harm to obtain greater benefits. Thus, value trade-offs that decision-makers refuse to accept when it is possible to completely avoid committing harm can suddenly become desirable when some harm must be committed.


Asunto(s)
Toma de Decisiones , Principios Morales , Afecto , Reducción del Daño , Humanos , Motivación
14.
Acta Psychiatr Scand ; 142(4): 326-336, 2020 10.
Artículo en Inglés | MEDLINE | ID: mdl-32786038

RESUMEN

OBJECTIVE: Obsessive-compulsive disorder (OCD) is a complex psychiatric disorder with a substantial genetic contribution. While the specific variants underlying OCD's heritability are still unknown, findings from genome-wide association studies (GWAS) corroborate the importance of common SNPs explaining the phenotypic variance in OCD. Investigating associations between the genetic liability for OCD, as reflected by a polygenic risk score (PRS), and potential endophenotypes of the disorder, such as the personality trait harm avoidance, may aid the understanding of functional pathways from genes to diagnostic phenotypes. METHODS: We derived PRS for OCD at several P-value thresholds based on the latest Psychiatric Genomics Consortium OCD GWAS (2688 cases, 7037 controls) in an independent sample of OCD patients (n = 180), their unaffected first-degree relatives (n = 108) and healthy controls (n = 200). Using linear regression, we tested whether these PRS are associated with the personality trait harm avoidance. RESULTS: Results showed that OCD PRS significantly predicted OCD status, with patients having the highest scores and relatives having intermediate scores. Furthermore, the genetic risk for OCD was associated with harm avoidance across the entire sample, and among OCD patients. As indicated by mediation analyses, harm avoidance mediated the association between the OCD PRS and OCD caseness. These results were observed at multiple P-value thresholds and persisted after the exclusion of patients with a current comorbid major depressive or anxiety disorder. CONCLUSION: Our findings support the polygenic nature of OCD and further validate harm avoidance as a candidate endophenotype and diathesis of OCD.


Asunto(s)
Trastorno Depresivo Mayor , Trastorno Obsesivo Compulsivo , Endofenotipos , Estudio de Asociación del Genoma Completo , Humanos , Trastorno Obsesivo Compulsivo/epidemiología , Trastorno Obsesivo Compulsivo/genética , Personalidad/genética
15.
Pers Individ Dif ; 1522020 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-32863503

RESUMEN

High rates of delay discounting are associated with a range of disorders characterized by behavioral disinhibition, such as substance abuse and childhood behavioral problems. The current study extends the research of the personality correlates of delay discounting by examining its association with two domains of disinhibited personality, impulsivity and low harm avoidance. Trait measures of impulsivity and harm avoidance as well as a delay discounting task were administered to 669 young adult subjects (350 male, 319 female). The primary hypothesis was that a combination of high impulsivity and low harm avoidance would be associated with the highest delay discounting rates. Delay discounting rates were significantly associated with high levels of impulsivity. Counterintuitively, the highest rates of delay discounting were associated with high rates of impulsivity and high rates of harm avoidance. Results suggest that those high in impulsivity and harm avoidance are more sensitive to immediate rewards. These results are novel and suggest more complex processes involved when considering a choice between an immediate and a delayed reward that may require longer waiting periods, which itself may be anxiety providing and perceived as potentially harmful.

16.
J Ethn Subst Abuse ; 19(4): 594-609, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-30676293

RESUMEN

Motivation is a significant factor in the treatment of addiction and has been proven to be a predictor of treatment outcomes. The present study investigated the effects of clinical variables, perceived social support, temperament, and personality traits on treatment motivation. This study included 100 patients whose detoxification treatment was completed following hospitalization in Alcohol and Drug Research, Treatment, and Training Center (AMATEM). Treatment motivations were assessed through Motivation for Treatment scale (MfT). Addiction Profile Index (API) was used to evaluate drug use characteristics, craving, and the effects of drug use on life. Temperament and character traits and perceived social support were evaluated by Temperament and Character Inventory (TCI) and Multidimensional Scale of Perceived Social Support (MSPSS), respectively. The number of treatment admissions, presence of a history of previous inpatient treatment, completed inpatient treatment, social support from the family, harm avoidance, substance use characteristics, craving, and the effect of substance on life showed differences while motivations of the patients were compared. Presence of a history of previously completed inpatient treatment, presence of high social support from the family, and significant recognition of the effects of substance on own life were evaluated as the factors predicting high motivation. The present study demonstrated that social support from family, previously completed inpatient treatment, and effect of substance in life had significant impact on motivation. Therefore, the assessment of these factors will aid in better understanding this population and in the design of long-term treatment plans.


Asunto(s)
Conducta Adictiva/rehabilitación , Pacientes Internos/estadística & datos numéricos , Motivación , Trastornos Relacionados con Sustancias/rehabilitación , Temperamento , Adulto , Conducta Adictiva/psicología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Factores de Riesgo , Trastornos Relacionados con Sustancias/psicología , Factores de Tiempo , Turquía
17.
J Neurosci ; 38(22): 5067-5077, 2018 05 30.
Artículo en Inglés | MEDLINE | ID: mdl-29724796

RESUMEN

Anxiety disorders are common and debilitating conditions with higher prevalence in women. However, factors that predispose women to anxiety phenotypes are not clarified. Here we investigated potential contribution of the single nucleotide polymorphism rs2236418 in GAD2 gene to changes in regional inhibition/excitation balance, anxiety-like traits, and related neural activity in both sexes. One hundred and five healthy individuals were examined with high-field (7T) multimodal magnetic resonance imaging (MRI); including resting-state functional MRI in combination with assessment of GABA and glutamate (Glu) levels via MR spectroscopy. Regional GABA/Glu levels in anterior cingulate cortex (ACC) subregions were assessed as mediators of gene-personality interaction for the trait harm avoidance and moderation by sex was tested. In AA homozygotes, with putatively lower GAD2 promoter activity, we observed increased intrinsic neuronal activity and higher inhibition/excitation balance in pregenual ACC (pgACC) compared with G carriers. The pgACC drove a significant interaction of genotype, region, and sex, where inhibition/excitation balance was significantly reduced only in female AA carriers. This finding was specific for rs2236418 as other investigated single nucleotide polymorphisms of the GABA synthesis related enzymes (GAD1, GAD2, and GLS) were not significant. Furthermore, only in women there was a negative association of pgACC GABA/Glu ratios with harm avoidance. A moderated-mediation model revealed that pgACC GABA/Glu also mediated the association between the genotype variant and level of harm avoidance, dependent on sex. Our data thus provide new insights into the neurochemical mechanisms that control emotional endophenotypes in humans and constitute predisposing factors for the development of anxiety disorders in women.SIGNIFICANCE STATEMENT Anxiety disorders are among the most common and burdensome psychiatric disorders, with higher prevalence rates in women. The causal mechanisms are, however, poorly understood. In this study we propose a neurobiological basis that could help to explain female bias of anxiety endophenotypes. Using magnetic resonance brain imaging and personality questionnaires we show an interaction of the genetic variation rs2236418 in the GAD2 gene and sex on GABA/glutamate (Glu) balance in the pregenual anterior cingulate cortex (pgACC), a region previously connected to affect regulation and anxiety disorders. The GAD2 gene polymorphism further influenced baseline neuronal activity in the pgACC. Importantly, GABA/Glu was shown to mediate the relationship between the genetic variant and harm avoidance, however, only in women.


Asunto(s)
Reacción de Prevención/fisiología , Glutamato Descarboxilasa/genética , Giro del Cíngulo/fisiología , Polimorfismo Genético/genética , Adulto , Mapeo Encefálico , Femenino , Genotipo , Humanos , Imagen por Resonancia Magnética , Masculino , Personalidad , Polimorfismo de Nucleótido Simple , Regiones Promotoras Genéticas , Adulto Joven
18.
Eat Weight Disord ; 24(5): 815-823, 2019 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-31313252

RESUMEN

PURPOSE: Some features of eating disorders (EDs) are often present in childhood before the onset of the ED. We developed a novel questionnaire to retrospectively capture such childhood traits. METHODS: Focus groups were conducted at the University of California-San Diego, USA, and at the University of Turin, Italy. Three focus groups were conducted at each site, interviewing patients and parents to identify those traits that most commonly characterize childhood of patients with EDs. A preliminary version of the Premorbid Childhood Traits Questionnaire (PCT-Q) derived from these focus groups was then administered to 94 consecutive inpatients with an ED and to 286 healthy controls (HCs) at the Turin site. Also, 208 participants' parents were enrolled as well; in fact, the PCT-Q was developed with both a proband and an informant version. RESULTS: A 37-item final version of the PCT-Q was generated. Reliability analyses suggested acceptability for harm avoidance (HA), social phobia, alexithymia, interoceptive awareness (IA), and food obsessions. Inter-rater reliability ranged from fair to moderate. ED sufferers scored significantly higher than HCs on HA, social phobia, alexithymia, IA, and food obsessions. CONCLUSIONS: These findings support the possibility that premorbid traits contribute to a risk to develop an ED in some individuals. LEVEL OF EVIDENCE: III: case-control analytic study.


Asunto(s)
Síntomas Afectivos/diagnóstico , Trastornos de Alimentación y de la Ingestión de Alimentos/diagnóstico , Fobia Social/diagnóstico , Adolescente , Adulto , Síntomas Afectivos/psicología , Estudios de Casos y Controles , Niño , Trastornos de Alimentación y de la Ingestión de Alimentos/psicología , Femenino , Humanos , Masculino , Fobia Social/psicología , Síntomas Prodrómicos , Reproducibilidad de los Resultados , Estudios Retrospectivos , Encuestas y Cuestionarios , Adulto Joven
19.
Cereb Cortex ; 27(3): 2175-2182, 2017 03 01.
Artículo en Inglés | MEDLINE | ID: mdl-27005989

RESUMEN

Brain-derived neurotrophic factor (BDNF) is an important modulator of constitutive stress responses mediated by limbic frontotemporal circuits, and its gene contains a functional polymorphism (Val66Met) that may influence trait stress sensitivity. Reports of an association of this polymorphism with anxiety-related personality traits have been controversial and without clear neurophysiological support. We, therefore, determined the relationship between resting regional cerebral blood flow (rCBF) and a well-validated measure of anxiety-related personality, the TPQ Harm Avoidance (HA) scale, as a function of BDNF Val66Met genotype. Sixty-four healthy participants of European ancestry underwent resting H215O positron emission tomography scans. For each genotype group separately, we first determined the relationship between participants' HA scores and their resting rCBF values in each voxel across the entire brain, and then directly compared these HA-rCBF relationships between Val66Met genotype groups. HA-rCBF relationships differed between Val homozygotes and Met carriers in several regions relevant to stress regulation: subgenual cingulate, orbital frontal cortex, and the hippocampal/parahippocampal region. In each of these areas, the relationship was positive in Val homozygotes and negative in Met carriers. These data demonstrate a coupling between trait anxiety and basal resting blood flow in frontolimbic neurocircuitry that may be determined in part by genetically mediated BDNF signaling.


Asunto(s)
Ansiedad/genética , Ansiedad/fisiopatología , Factor Neurotrófico Derivado del Encéfalo/genética , Encéfalo/fisiología , Personalidad/genética , Personalidad/fisiología , Adolescente , Adulto , Encéfalo/diagnóstico por imagen , Mapeo Encefálico , Circulación Cerebrovascular/genética , Circulación Cerebrovascular/fisiología , Femenino , Heterocigoto , Homocigoto , Humanos , Masculino , Persona de Mediana Edad , Pruebas de Personalidad , Polimorfismo de Nucleótido Simple , Tomografía de Emisión de Positrones , Descanso , Población Blanca/genética , Adulto Joven
20.
Compr Psychiatry ; 87: 128-133, 2018 11.
Artículo en Inglés | MEDLINE | ID: mdl-30367986

RESUMEN

BACKGROUND: Several conditions presenting with abdominal pain are associated with specific personality factors although it is unclear if this is true also in emergency clinic settings. OBJECTIVE: To study personality factors among patients with acute abdominal pain in an emergency ward. METHODS: Consecutive patients (N = 165) with abdominal symptoms at an emergency clinic were administrated the Temperament and Character Inventory (TCI). Three main groups were identified; specific abdominal diagnoses, (N = 77), non-specific abdominal pain, (N = 67) and organic dyspepsia (N = 21). TCI results were compared between clinical groups and a control group (N = 122). RESULTS: As compared to individuals with specific abdominal diagnoses and controls, those with organic dyspepsia were significantly more anxious (harm avoidance), (p = 0.003), and had lower ability to cooperate (cooperativeness) (p = 0.048 and p = 0.004 respectively). They were also significantly more unpretentious (self-transcendence) compared to individuals with specific abdominal diagnoses (p = 0.048), non-specific abdominal pain (p = 0.012) and controls (p = 0.004) and evidenced less mature character (sum of self-directedness and cooperativeness) compared to those with specific abdominal diagnoses and controls (p = 0.003). CONCLUSION: Individuals seeking care at an emergency clinic with organic dyspepsia showed a distinguishable pattern of personality features that distinguished them from the other comparison groups. Therefore an evaluation of personality factors may add a new dimension to the diagnostic investigation in the emergency care of abdominal pain and contribute to the optimization of the treatment of organic dyspepsia.


Asunto(s)
Abdomen Agudo/psicología , Ansiedad/etiología , Carácter , Trastornos de la Personalidad/diagnóstico , Temperamento , Abdomen Agudo/diagnóstico , Adulto , Servicio de Urgencia en Hospital , Femenino , Humanos , Masculino , Persona de Mediana Edad , Trastornos de la Personalidad/complicaciones , Inventario de Personalidad
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