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1.
Artigo em Inglês | MEDLINE | ID: mdl-38270620

RESUMO

Temporal coordination of communicative behavior is not only located between but also within interaction partners (e.g., gaze and gestures). This intrapersonal synchrony (IaPS) is assumed to constitute interpersonal alignment. Studies show systematic variations in IaPS in individuals with autism, which may affect the degree of interpersonal temporal coordination. In the current study, we reversed the approach and mapped the measured nonverbal behavior of interactants with and without ASD from a previous study onto virtual characters to study the effects of the differential IaPS on observers (N = 68), both with and without ASD (crossed design). During a communication task with both characters, who indicated targets with gaze and delayed pointing gestures, we measured response times, gaze behavior, and post hoc impression formation. Results show that character behavior indicative of ASD resulted in overall enlarged decoding times in observers and this effect was even pronounced in observers with ASD. A classification of observer's gaze types indicated differentiated decoding strategies. Whereas non-autistic observers presented with a rather consistent eyes-focused strategy associated with efficient and fast responses, observers with ASD presented with highly variable decoding strategies. In contrast to communication efficiency, impression formation was not influenced by IaPS. The results underline the importance of timing differences in both production and perception processes during multimodal nonverbal communication in interactants with and without ASD. In essence, the current findings locate the manifestation of reduced reciprocity in autism not merely in the person, but in the interactional dynamics of dyads.

2.
Eur Arch Psychiatry Clin Neurosci ; 273(3): 731-738, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35567615

RESUMO

For individuals with autism spectrum disorder (ASD), both getting access to as well as staying in the labor market are very challenging. However, the detailed educational, vocational, and employment characteristics of persons with ASD without intellectual disabilities are not yet studied. We conducted a retrospective study on a sample of 232 clinically late-diagnosed adults with ASD without intellectual disabilities. Data were compared to the general German population obtained from the public database of the German Federal Employment Agency. Results showed that the majority of persons with ASD graduated from high school and obtained a university entrance qualification (ASD: 50.4%; general population: 32.5%). Also, lower rates of basic secondary education were found in the ASD sample (ASD: 16.5%, general population: 29.6%). Significantly less individuals with ASD completed vocational training (40.1%) in comparison to the German population (56.3%). Despite the above-average level of education, the unemployment rate of the sample substantially exceeds that of the general population by the factor 5 (ASD: 25.2%; general population: 5.2%). Periods of unwanted unemployment of persons with ASD lasted on average 23 months with interpersonal problems being the main reason for contract termination. A higher level of educational qualification does not protect against a higher risk of unemployment for individuals with ASD presumably due to autism-specific interpersonal difficulties. Data emphasize the necessity to develop and spread both specific employment support activities for individuals with ASD as well as adequate awareness raising strategies. Funded by a public grant of the "Landschaftsverband Rheinland (LVR)".


Assuntos
Transtorno do Espectro Autista , Deficiência Intelectual , Humanos , Adulto , Transtorno do Espectro Autista/epidemiologia , Desemprego , Deficiência Intelectual/epidemiologia , Estudos Transversais , Estudos Retrospectivos , Alemanha/epidemiologia
3.
BMC Psychiatry ; 23(1): 528, 2023 07 21.
Artigo em Inglês | MEDLINE | ID: mdl-37479974

RESUMO

BACKGROUND: Autism refers to a neurodevelopmental condition with characteristic impairments in social interaction and communication, restrictive and repetitive behaviors, as well as difficulties in sensory information processing and daily living skills. Even though symptoms persist from early childhood throughout the lifespan and often require long-term support, there is a lack of mental health services that sufficiently meet the needs of autistic adults. Previous evidence suggested individual, professional and structural barriers to healthcare for autistic adults. Here, using a peer research approach, we sought to systematically investigate barriers and needs in mental healthcare of autistic adults in Germany at the three relevant levels (individual, professional, structural) and from three relevant perspectives (autistic adults, relatives and healthcare providers), in order to obtain specific recommendations for optimized healthcare. METHODS: Maximum variation sampling was used to account for the complexity of the research field. Semi-structured, open-ended interviews were conducted with autistic adults (n = 15) and focus groups with relatives/partners (n = 12), and healthcare providers of several professions (n = 15). Data analysis was performed using the codebook approach of thematic analysis. RESULTS: Poor mental healthcare of autistic adults in Germany was characterized by six central and overarching themes: (i) lack of knowledge about autism, (ii) a need for increased participation/involvement, (iii) consideration of autism-specific needs in treatment, (iv) lack of services, (v) limited access to services, and (vi) improvement of stakeholder collaboration. Themes were similarly reported across participants, emphasizing dissatisfaction in all stakeholders. CONCLUSIONS: We identified major barriers to mental healthcare for autistic adults in Germany that affect autistic adults, but are also of concern to relatives and healthcare providers. Our results point to specific and generic areas for improvement, independent of stakeholder perspectives, which could guide future development of needs- and evidence-based services, recommendations and guidelines of mental healthcare for people with autism across the lifespan. TRIAL REGISTRATION: This study protocol was preregistered at the Open Science Framework ( https://osf.io/5x8pg ).


Assuntos
Transtorno do Espectro Autista , Transtorno Autístico , Serviços de Saúde Mental , Pré-Escolar , Adulto , Humanos , Transtorno do Espectro Autista/terapia , Alemanha , Pessoal de Saúde , Atenção à Saúde
4.
Behav Brain Sci ; 46: e48, 2023 04 05.
Artigo em Inglês | MEDLINE | ID: mdl-37017072

RESUMO

The relation between communication partners is crucial for the success of their interaction. This is also true for artificial social agents. However, the more we engage in artificial relationships, the more we are forced to regulate and control them. I refer to this as binding paradox. This deserves attention during technological developments and requires professional supervision during ongoing interactions.


Assuntos
Comunicação , Humanos
5.
Hum Brain Mapp ; 43(4): 1309-1325, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-34826162

RESUMO

Ineffective use of adaptive cognitive strategies (e.g., reappraisal) to regulate emotional states is often reported in a wide variety of psychiatric disorders, suggesting a common characteristic across different diagnostic categories. However, the extent of shared neurobiological impairments is incompletely understood. This study, therefore, aimed to identify the transdiagnostic neural signature of disturbed reappraisal using the coordinate-based meta-analysis (CBMA) approach. Following the best-practice guidelines for conducting neuroimaging meta-analyses, we systematically searched PubMed, ScienceDirect, and Web of Science databases and tracked the references. Out of 1,608 identified publications, 32 whole-brain neuroimaging studies were retrieved that compared brain activation in patients with psychiatric disorders and healthy controls during a reappraisal task. Then, the reported peak coordinates of group comparisons were extracted and several activation likelihood estimation (ALE) analyses were performed at three hierarchical levels to identify the potential spatial convergence: the global level (i.e., the pooled analysis and the analyses of increased/decreased activations), the experimental-contrast level (i.e., the analyses of grouped data based on the regulation goal, stimulus valence, and instruction rule) and the disorder-group level (i.e., the analyses across the experimental-contrast level focused on increasing homogeneity of disorders). Surprisingly, none of our analyses provided significant convergent findings. This CBMA indicates a lack of transdiagnostic convergent regional abnormality related to reappraisal task, probably due to the complex nature of cognitive emotion regulation, heterogeneity of clinical populations, and/or experimental and statistical flexibility of individual studies.


Assuntos
Encéfalo/fisiopatologia , Disfunção Cognitiva/fisiopatologia , Regulação Emocional/fisiologia , Neuroimagem Funcional , Encéfalo/diagnóstico por imagem , Disfunção Cognitiva/diagnóstico por imagem , Humanos
6.
Eur Arch Psychiatry Clin Neurosci ; 272(6): 997-1005, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34476588

RESUMO

Difficulties in interpersonal communication, including conversational skill impairments, are core features of schizophrenia. However, very few studies have performed conversation analyses in a clinical population of schizophrenia patients. Here we investigate the conversational patterns of dialogues in schizophrenia patients to assess possible associations with symptom dimensions, subjective self-disturbances and social functioning. Thirty-five schizophrenia patients were administered the Positive and Negative Syndrome Scale (PANSS), the Clinical Language Disorder Rating Scale (CLANG), the Scale for the Assessment of Thought, Language and Communication (TLC), the Examination of Anomalous Self-Experience Scale (EASE), and the Social and Occupational Functioning Assessment Scale (SOFAS). Moreover, participants underwent a recorded semi-structured interview, to extract conversational variables. Conversational data were associated with negative symptoms and social functioning, but not with positive or disorganization symptoms. A significant positive correlation was found between "pause duration" and the EASE item "Spatialization of thought". The present study suggests an association between conversational patterns and negative symptom dimension of schizophrenia. Moreover, our findings evoke a relationship between the natural fluidity of conversation and of the natural unraveling of thoughts.


Assuntos
Esquizofrenia , Cognição , Humanos , Idioma , Escalas de Graduação Psiquiátrica , Psicopatologia , Esquizofrenia/complicações , Psicologia do Esquizofrênico
7.
Eur Arch Psychiatry Clin Neurosci ; 272(5): 909-922, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-34982217

RESUMO

Schizotypy constitutes a susceptibility to beneficial and deleterious schizotypal traits, ranging from coping mechanisms to schizotypal personality disorder on a psychosis continuum. Growing evidence indicates a relationship between childhood adversity and trauma and schizotypy. However, the exact influence of childhood adversity and trauma on schizotypy and its relation to sex is not sufficiently understood. Therefore, we investigated sex-adjusted connections between childhood adversity and trauma subdomains (emotional/physical/sexual abuse, emotional/physical neglect) and positive (magical ideation, perceptual aberration) as well as negative schizotypy (physical/social anhedonia). In total, 240 outpatients of the Early Detection and Intervention Centre of the University Hospital Cologne were assessed with the Trauma and Distress Scale for childhood adversity and trauma and the Wisconsin Schizotypy Scales for schizotypy. Path analyses were performed to investigate sex-adjusted correlations. The well-fitting path model of the total sample linked emotional abuse to magical ideation (p = 0.03; SE = 0.20) and emotional neglect to social anhedonia (p = 0.01; SE = 0.26). In females, physical abuse predicted magical ideation (p = 0.01; SE = 0.33), while emotional neglect forecasted physical anhedonia (p = 0.03; SE = 0.34) and social anhedonia (p = 0.03; SE = 0.32). In males, sexual abuse predicted perceptive aberration (p = 0.04; SE = 0.19) and emotional abuse forecasted magical ideation (p = 0.03; SE = 0.27). Overall, the significance of sex-specific interrelations between trauma and schizotypy were highlighted. Magical ideation and perceptive aberration occurred prominently in the absence of negative and disorganized schizotypy, thus positive schizotypy could be discussed as a beneficial expression of coping with emotional, physical and sexual abuse. Furthermore, emotional neglect should be addressed particularly to prevent deleterious negative schizotypy in females.Trial registration number (20-1243), date of registration (May 19th 2020), retrospectively registered.


Assuntos
Experiências Adversas da Infância , Transtornos Psicóticos , Transtorno da Personalidade Esquizotípica , Adaptação Psicológica , Anedonia , Feminino , Humanos , Masculino , Transtornos Psicóticos/diagnóstico , Transtorno da Personalidade Esquizotípica/diagnóstico
8.
Eur J Neurosci ; 52(9): 4214-4229, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-32618038

RESUMO

The "Choose-a-Movie-CAM" is an established task to quantify the motivation for seeking social rewards. It allows participants to directly assess both the stimulus value and the effort required to obtain it. In the present study, we aimed to identify the neural mechanisms of such cost-benefit decision-making. To this end, functional Magnetic Resonance Imaging data were collected from 24 typical adults while they completed the CAM task. We partly replicated the results from our previous behavioural studies showing that typical adults prefer social over object stimuli and low effort over higher effort stimuli but found no interaction between the two. Results from neuroimaging data suggest that there are distinct neural correlates for social and object preferences. The precuneus and medial orbitofrontal cortex, two key areas involved in social processing are engaged when participants make a social choice. Areas of the ventral and dorsal stream pathways associated with object recognition are engaged when making an object choice. These activations can be seen during the decision phase even before the rewards have been consumed, indicating a transfer the hedonic properties of social stimuli to its cues. We also found that the left insula and bilateral clusters in the inferior occipital gyrus and the inferior parietal lobule were recruited for increasing effort investment. We discuss limitations and implications of this study which reveals the distinct neural correlates for social and object rewards, using a robust behavioural measure of social motivation.


Assuntos
Motivação , Recompensa , Adulto , Mapeamento Encefálico , Humanos , Imageamento por Ressonância Magnética , Lobo Occipital , Lobo Parietal
9.
Arch Womens Ment Health ; 23(3): 339-349, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-31485796

RESUMO

Sex differences may be important for understanding underlying pathophysiological mechanisms and developing effective preventions and treatments of mental disorders. Despite sex differences in the onset of psychosis, patients at clinical high risk for psychosis (CHR) are underinvestigated for sex effects, especially with respect to models for prediction of conversion to psychosis. We studied psychopathological sex differences in referrals to a German early detection service and in its subgroup of converters and examined sex-specific psychopathological prediction models. In 152 male and 90 female referrals (88% at CHR; 35% converters), symptoms assessed with the Structured Interview for Psychosis-Risk Syndromes were investigated for sex differences using effect sizes. Sex-specific prediction models of psychosis were separately generated using Cox regressions with a LASSO operator. We found different small sex effects (0.10 < Rosenthal's r < 0.30) in the referral and in the converter sample. In the referral sample, exclusively, males showed more pronounced symptoms (all negative symptoms incl. reduced stress tolerance, grandiosity, and disorganized communication); in converters, females experienced more pronounced perceptual abnormalities, bizarre thinking, and odd behaviors, while males expressed and experienced emotions to a lower degree. Furthermore, sexes differed in psychosis-predictive symptoms: "suspiciousness" and "disorganized communication" were prominent in prediction of psychosis in males, whereas "trouble with focus and attention" was so in females. While most sex differences in patients attending an early detection service seem to reflect general differences that are not specifically related to psychosis, others might be psychosis-specific. These results can inform the development of more individualized and effective interventions for CHR patients based on more precise sex-specific prediction models.


Assuntos
Sintomas Prodrômicos , Transtornos Psicóticos/diagnóstico , Caracteres Sexuais , Adolescente , Adulto , Diagnóstico Precoce , Feminino , Alemanha , Humanos , Masculino , Escalas de Graduação Psiquiátrica , Encaminhamento e Consulta , Adulto Jovem
10.
Camb Q Healthc Ethics ; 29(4): 574-584, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32892774

RESUMO

Recent improvements in virtual reality (VR) allow for the representation of authentic environments and multiple users in a shared complex virtual world in real time. These advances have fostered clinical applications including in psychiatry. However, although VR is already used in clinical settings to help people with mental disorders (e.g., exposure therapy), the related ethical issues require greater attention. Based on a thematic literature search the authors identified five themes that raise ethical concerns related to the clinical use of VR: (1) reality and its representation, (2) autonomy, (3) privacy, (4) self-diagnosis and self-treatment, and (5) expectation bias. Reality and its representation is a theme that lies at the heart of VR, but is also of specific significance in a clinical context when perceptions of reality are concerned, for example, during psychosis. Closely associated is the autonomy of VR users. Although autonomy is a much-considered topic in biomedical ethics, it has not been sufficiently discussed when it comes to applications of VR in psychiatry. In this review, the authors address the different themes and recommend the development of an ethical framework for the clinical use of VR.


Assuntos
Transtornos Mentais , Psiquiatria , Terapia de Exposição à Realidade Virtual , Realidade Virtual , Humanos , Transtornos Mentais/terapia , Princípios Morais
11.
Z Kinder Jugendpsychiatr Psychother ; 48(6): 440-442, 2020 Nov.
Artigo em Alemão | MEDLINE | ID: mdl-32175796

RESUMO

Transition in autism spectrum disorders Abstract. Children and adolescents with autism spectrum disorder (ASD) are regularly seen by child and adolescent psychiatrists. Many diagnostic and therapeutic interventions are available for this age group. However, ASD is a rather unknown disorder in adult services, including psychiatry - despite the chronic course and the individual need for diagnosis, intervention, and support also in adulthood. Transition from childhood into adulthood is a rather complex topic that includes the challenge of mastering education and employment. This article presents these transition-related aspects and recommendations to improve healthcare in Germany.


Assuntos
Transtorno do Espectro Autista/terapia , Psiquiatria/métodos , Transição para Assistência do Adulto , Adolescente , Adulto , Transtorno do Espectro Autista/diagnóstico , Criança , Atenção à Saúde , Alemanha , Humanos
12.
Neuroimage ; 202: 116102, 2019 11 15.
Artigo em Inglês | MEDLINE | ID: mdl-31446128

RESUMO

Movements can inform us about what people are doing and also about how they feel. This phenomenologically evident distinction has been suggested to correspond functionally with differential neural correlates denoted as mirror neuron system (MNS) and mentalizing system (MENT). To separate out the roles of the underlying systems we presented identical stimuli under different task demands: character animations showing everyday activities (mopping, sweeping) performed in different moods (angry, happy). Thirty-two participants were undergoing functional magnetic resonance imaging (fMRI) while asked to identify either the performed movement or the displayed mood. Univariate GLM analysis revealed the expected activation of either in MNS or MENT depending on the task. A complementary multivariate pattern-learning analysis based on the "social brain atlas" confirmed the expected recruitment of both systems. In conclusion, both approaches converge onto clearly distinct functional roles of both social neural networks in a novel dynamic social perception paradigm.


Assuntos
Mapeamento Encefálico/métodos , Encéfalo/fisiologia , Mentalização/fisiologia , Neurônios-Espelho/fisiologia , Adulto , Feminino , Humanos , Aprendizado de Máquina , Imageamento por Ressonância Magnética/métodos , Masculino , Percepção Social
13.
Cereb Cortex ; 28(7): 2207-2232, 2018 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-28521007

RESUMO

Social skills probably emerge from the interaction between different neural processing levels. However, social neuroscience is fragmented into highly specialized, rarely cross-referenced topics. The present study attempts a systematic reconciliation by deriving a social brain definition from neural activity meta-analyses on social-cognitive capacities. The social brain was characterized by meta-analytic connectivity modeling evaluating coactivation in task-focused brain states and physiological fluctuations evaluating correlations in task-free brain states. Network clustering proposed a functional segregation into (1) lower sensory, (2) limbic, (3) intermediate, and (4) high associative neural circuits that together mediate various social phenomena. Functional profiling suggested that no brain region or network is exclusively devoted to social processes. Finally, nodes of the putative mirror-neuron system were coherently cross-connected during tasks and more tightly coupled to embodied simulation systems rather than abstract emulation systems. These first steps may help reintegrate the specialized research agendas in the social and affective sciences.


Assuntos
Mapeamento Encefálico , Encéfalo/fisiologia , Conectoma , Vias Neurais/fisiologia , Comportamento Social , Humanos , Metanálise como Assunto
14.
Z Kinder Jugendpsychiatr Psychother ; 47(4): 359-370, 2019 Jul.
Artigo em Alemão | MEDLINE | ID: mdl-30326807

RESUMO

The diagnostics of autism spectrum disorder in children, adolescents and adults: Overview of the key questions and main results of the first part of the German AWMF-S3 - clinical guideline Abstract. Background: Autism spectrum disorders (ASD) include ICD-10 diagnoses of childhood autism, Asperger syndrome, and atypical autism; there is a lifetime prevalence of ~1 %. The aim of the evidence-based clinical guideline (AWMF-S3-Guideline) is to summarize the current evidence concerning diagnostic and therapeutic processes for professionals working in healthcare and social welfare and to provide consensus on clinical recommendations. The present study summarizes the most important results of the diagnostic part of this guideline. Method: The guideline group comprised 14 clinical and scientific expert associations from the German healthcare system, in addition to representatives of relatives and patients. Recommendations were based on results of a systematic literature search, data extraction, the evaluation of study quality, and, if possible, meta-analytic aggregation of included data in combination with the clinical expertise of the respective representatives. Consensus-based recommendations were determined via nominal group technique. Results: The AWMF-S3-Clinical Guideline, Diagnostic Part, summarizes current research on this topic. The main focus is put on the question of obligatory versus redundant diagnostic procedures. After a general introduction to the clinical picture of ASD, essential aspects like obtaining the medical history, the effective use of screening and diagnostic instruments, medical examination, the full diagnostic work-up as well as communicating the diagnostic results to relatives and patients are described in detail. We also conducted a meta-analysis on the stability of early diagnosis. Conclusion: This first part of the ASD guideline offers users the opportunity to inform themselves about the background of ASD as well as evidence-based and broadly consented information on the correct diagnostic process of ASD from infancy to adulthood.


Assuntos
Transtorno do Espectro Autista/diagnóstico , Guias de Prática Clínica como Assunto , Adolescente , Adulto , Síndrome de Asperger/diagnóstico , Síndrome de Asperger/epidemiologia , Transtorno do Espectro Autista/epidemiologia , Pesquisa Biomédica , Criança , Alemanha/epidemiologia , Humanos , Prevalência
15.
Proc Natl Acad Sci U S A ; 111(7): 2842-7, 2014 Feb 18.
Artigo em Inglês | MEDLINE | ID: mdl-24449854

RESUMO

Social interaction deficits in drug users likely impede treatment, increase the burden of the affected families, and consequently contribute to the high costs for society associated with addiction. Despite its significance, the neural basis of altered social interaction in drug users is currently unknown. Therefore, we investigated basal social gaze behavior in cocaine users by applying behavioral, psychophysiological, and functional brain-imaging methods. In study I, 80 regular cocaine users and 63 healthy controls completed an interactive paradigm in which the participants' gaze was recorded by an eye-tracking device that controlled the gaze of an anthropomorphic virtual character. Valence ratings of different eye-contact conditions revealed that cocaine users show diminished emotional engagement in social interaction, which was also supported by reduced pupil responses. Study II investigated the neural underpinnings of changes in social reward processing observed in study I. Sixteen cocaine users and 16 controls completed a similar interaction paradigm as used in study I while undergoing functional magnetic resonance imaging. In response to social interaction, cocaine users displayed decreased activation of the medial orbitofrontal cortex, a key region of reward processing. Moreover, blunted activation of the medial orbitofrontal cortex was significantly correlated with a decreased social network size, reflecting problems in real-life social behavior because of reduced social reward. In conclusion, basic social interaction deficits in cocaine users as observed here may arise from altered social reward processing. Consequently, these results point to the importance of reinstatement of social reward in the treatment of stimulant addiction.


Assuntos
Transtornos Relacionados ao Uso de Cocaína/complicações , Transtornos Relacionados ao Uso de Cocaína/fisiopatologia , Relações Interpessoais , Recompensa , Transtornos do Comportamento Social/etiologia , Transtornos do Comportamento Social/fisiopatologia , Adulto , Transtornos Relacionados ao Uso de Cocaína/terapia , Movimentos Oculares/fisiologia , Fixação Ocular/fisiologia , Humanos , Imageamento por Ressonância Magnética , Pessoa de Meia-Idade , Neuroimagem/métodos , Suíça
16.
Neuroimage ; 133: 151-162, 2016 06.
Artigo em Inglês | MEDLINE | ID: mdl-26883063

RESUMO

People are motivated to adopt the most favorable beliefs about their future because positive beliefs are experienced as rewarding. However, it is so far inconclusive whether brain regions known to represent reward values are involved in the generation of optimistically biased belief updates. To address this question, we investigated neural correlates of belief updates that result in relatively better future outlooks, and therefore imply a positive subjective value of the judgment outcome. Participants estimated the probability of experiencing different adverse future events. After being provided with population base rates of these events, they had the opportunity to update their initial estimates. Participants made judgments concerning themselves or a similar other, and were confronted with desirable or undesirable base rates (i.e., lower or higher than their initial estimates). Belief updates were smaller following undesirable than desirable information, and this optimism bias was stronger for judgments regarding oneself than others. During updating, the positive value of self-related updates was reflected by neural activity in the subgenual ventromedial prefrontal cortex (vmPFC) that increased both with increasing sizes of favorable updates, and with decreasing sizes of unfavorable updates. During the processing of self-related undesirable base rates, increasing activity in a network including the dorsomedial PFC, hippocampus, thalamus and ventral striatum predicted decreasing update sizes. Thus, key regions of the neural reward circuitry contributed to the generation of optimistically biased self-referential belief updates. While the vmPFC tracked subjective values of belief updates, a network including the ventral striatum was involved in neglecting information calling for unfavorable updates.


Assuntos
Antecipação Psicológica/fisiologia , Cultura , Julgamento/fisiologia , Otimismo , Córtex Pré-Frontal/fisiologia , Recompensa , Estriado Ventral/fisiologia , Adulto , Mapeamento Encefálico/métodos , Feminino , Humanos , Masculino , Motivação/fisiologia , Rede Nervosa/fisiologia , Plasticidade Neuronal/fisiologia
17.
Neuroimage ; 101: 124-37, 2014 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-24996121

RESUMO

There is ample evidence that human primates strive for social contact and experience interactions with conspecifics as intrinsically rewarding. Focusing on gaze behavior as a crucial means of human interaction, this study employed a unique combination of neuroimaging, eye-tracking, and computer-animated virtual agents to assess the neural mechanisms underlying this component of behavior. In the interaction task, participants believed that during each interaction the agent's gaze behavior could either be controlled by another participant or by a computer program. Their task was to indicate whether they experienced a given interaction as an interaction with another human participant or the computer program based on the agent's reaction. Unbeknownst to them, the agent was always controlled by a computer to enable a systematic manipulation of gaze reactions by varying the degree to which the agent engaged in joint attention. This allowed creating a tool to distinguish neural activity underlying the subjective experience of being engaged in social and non-social interaction. In contrast to previous research, this allows measuring neural activity while participants experience active engagement in real-time social interactions. Results demonstrate that gaze-based interactions with a perceived human partner are associated with activity in the ventral striatum, a core component of reward-related neurocircuitry. In contrast, interactions with a computer-driven agent activate attention networks. Comparisons of neural activity during interaction with behaviorally naïve and explicitly cooperative partners demonstrate different temporal dynamics of the reward system and indicate that the mere experience of engagement in social interaction is sufficient to recruit this system.


Assuntos
Neuroimagem Funcional/métodos , Relações Interpessoais , Recompensa , Interface Usuário-Computador , Estriado Ventral/fisiologia , Adulto , Comportamento Cooperativo , Medições dos Movimentos Oculares , Movimentos Oculares , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Córtex Pré-Frontal/fisiologia , Adulto Jovem
18.
Hum Brain Mapp ; 35(4): 1362-78, 2014 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23813661

RESUMO

Despite the fact that nonverbal dyadic social interactions are abundant in the environment, the neural mechanisms underlying their processing are not yet fully understood. Research in the field of social neuroscience has suggested that two neural networks appear to be involved in social understanding: (1) the action observation network (AON) and (2) the social neural network (SNN). The aim of this study was to determine the differential contributions of the AON and the SNN to the processing of nonverbal behavior as observed in dyadic social interactions. To this end, we used short computer animation sequences displaying dyadic social interactions between two virtual characters and systematically manipulated two key features of movement activity, which are known to influence the perception of meaning in nonverbal stimuli: (1) movement fluency and (2) contingency of movement patterns. A group of 21 male participants rated the "naturalness" of the observed scenes on a four-point scale while undergoing fMRI. Behavioral results showed that both fluency and contingency significantly influenced the "naturalness" experience of the presented animations. Neurally, the AON was preferentially engaged when processing contingent movement patterns, but did not discriminate between different degrees of movement fluency. In contrast, regions of the SNN were engaged more strongly when observing dyads with disturbed movement fluency. In conclusion, while the AON is involved in the general processing of contingent social actions, irrespective of their kinematic properties, the SNN is preferentially recruited when atypical kinematic properties prompt inferences about the agents' intentions.


Assuntos
Encéfalo/fisiologia , Percepção de Movimento/fisiologia , Comunicação não Verbal , Percepção Social , Adulto , Fenômenos Biomecânicos , Mapeamento Encefálico , Humanos , Imageamento por Ressonância Magnética , Masculino , Atividade Motora , Vias Neurais/fisiologia , Testes Neuropsicológicos , Estimulação Luminosa , Gravação em Vídeo , Adulto Jovem
19.
Annu Rev Psychol ; 64: 335-59, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-22994921

RESUMO

Cultural neuroscience (CN) is an interdisciplinary field that investigates the relationship between culture (e.g., value and belief systems and practices shared by groups) and human brain functions. In this review we describe the origin, aims, and methods of CN as well as its conceptual framework and major findings. We also clarify several misunderstandings of CN research. Finally, we discuss the implications of CN findings for understanding human brain function in sociocultural contexts and novel questions that future CN research should address. By doing so, we hope to provide a clear picture of the CN approach to the human brain and culture and to elucidate the intrinsically biosocial nature of the functional organization of the human brain.


Assuntos
Encéfalo/fisiologia , Cultura , Etnopsicologia/métodos , Neurociências/métodos , Comportamento Social , Etnopsicologia/tendências , Humanos , Neurociências/tendências
20.
Front Psychiatry ; 15: 1288674, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38645414

RESUMO

Background: Alterations in the experience of controlling oneself and one's environment are of high relevance to understanding the psychopathology of depression. This study investigated the relationship between Temporal Binding for action-event sequences, sense of agency, self-efficacy and symptom severity in Major Depressive Disorder. Method: We employed the Sense of Agency Scale (SoAS) and the General Self-Efficacy Scale (GSE) to assess explicit Sense of Agency and self-efficacy in a group of 42 persons diagnosed with Major Depressive Disorder (MDD) [20 identifying as female, 19 as male; mean age 37.8 years (± 13.3)] and 40 control persons without a psychiatric diagnosis (CG) [22 identifying as female, 20 as male; mean age 38.0 years ( ± 13.3)]. Depressive symptom severity was measured using the BDI-II. We additionally performed a temporal binding paradigm as a potential correlate to Sense of Agency. Participants partook in a time estimation task judging three intervals (250ms, 450ms, 650ms) while either observing or causing stimulus presentations. The underestimation of intervals following intentional actions causing stimulus presentations (compared to merely observing the stimulus presentation) is interpreted as temporal binding. Results: SoAS scores demonstrated an inverse correlation with depressive symptoms (CG: p=.032, R2=.113; MDD: p<.001, R2=.260) and a positive correlation with GSE scores (CG: p<.001, R2=.379; MDD: p<.001, R2=.254). We found distinct differences in temporal binding between healthy participants and the Major Depressive Disorder group without significant correlation between temporal binding and the SoAS or GSE scores. The data suggest group differences in time estimation particular pertaining to time intervals involving intentional action and increasingly complex multisensory stimuli. Discussion: We investigated parameters of subjective control, namely Sense of Agency and Self Efficacy. Here, we were able to reveal their inverse relationship with depressive symptoms in patients with major depressive disorder, highlighting a profound experience of loss of control with increasing symptom load. Deficits in experiencing control, particularly involving intentional motor actions (and more complex multisensory stimuli), appear to be more pronounced in Major Depressive Disorder, involving not only negative self-efficacy expectations but also an altered Sense of Agency and temporal binding. Temporal binding and SoAS scores did not correlate, adding to the growing evidence that the two measures may not be directly related. We propose that future research be directed at this contiguous relationship between Sense of Agency and Self Efficacy in Major Depressive Disorder.

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