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1.
Cell ; 184(16): 4315-4328.e17, 2021 08 05.
Artigo em Inglês | MEDLINE | ID: mdl-34197734

RESUMO

An ability to build structured mental maps of the world underpins our capacity to imagine relationships between objects that extend beyond experience. In rodents, such representations are supported by sequential place cell reactivations during rest, known as replay. Schizophrenia is proposed to reflect a compromise in structured mental representations, with animal models reporting abnormalities in hippocampal replay and associated ripple activity during rest. Here, utilizing magnetoencephalography (MEG), we tasked patients with schizophrenia and control participants to infer unobserved relationships between objects by reorganizing visual experiences containing these objects. During a post-task rest session, controls exhibited fast spontaneous neural reactivation of presented objects that replayed inferred relationships. Replay was coincident with increased ripple power in hippocampus. Patients showed both reduced replay and augmented ripple power relative to controls, convergent with findings in animal models. These abnormalities are linked to impairments in behavioral acquisition and subsequent neural representation of task structure.


Assuntos
Aprendizagem , Neurônios/patologia , Esquizofrenia/patologia , Esquizofrenia/fisiopatologia , Ritmo alfa/fisiologia , Comportamento , Mapeamento Encefálico , Feminino , Hipocampo/fisiopatologia , Humanos , Magnetoencefalografia , Masculino , Modelos Biológicos , Análise e Desempenho de Tarefas
2.
Proc Natl Acad Sci U S A ; 119(26): e2204172119, 2022 06 28.
Artigo em Inglês | MEDLINE | ID: mdl-35737844

RESUMO

The influence of prior knowledge on memory is ubiquitous, making the specific mechanisms of this relationship difficult to disentangle. Here, we show that expert knowledge produces a fundamental shift in the way that interitem similarity (i.e., the perceived resemblance between items in a set) biases episodic recognition. Within a group of expert birdwatchers and matched controls, we characterized the psychological similarity space for a set of well-known local species and a set of less familiar, nonlocal species. In experts, interitem similarity was influenced most strongly by taxonomic features, whereas in controls, similarity judgments reflected bird color. In controls, perceived episodic oldness during a recognition memory task increased along with measures of global similarity between items, consistent with classic models of episodic recognition. Surprisingly, for experts, high global similarity did not drive oldness signals. Instead, for local birds memory tracked the availability of species-level name knowledge, whereas for nonlocal birds, it was mediated by the organization of generalized conceptual space. These findings demonstrate that episodic memory in experts can benefit from detailed subcategory knowledge, or, lacking that, from the overall relational structure of concepts. Expertise reshapes psychological similarity space, helping to resolve mnemonic separation challenges arising from high interitem overlap. Thus, even in the absence of knowledge about item-specific details or labels, the presence of generalized knowledge appears to support episodic recognition in domains of expertise by altering the typical relationship between psychological similarity and memory.


Assuntos
Conhecimento , Memória Episódica , Animais , Humanos , Julgamento , Reconhecimento Psicológico
3.
Am J Transplant ; 2024 Jul 30.
Artigo em Inglês | MEDLINE | ID: mdl-39084463

RESUMO

Microvascular inflammation (MVI) is a key diagnostic feature of antibody-mediated rejection (AMR); however, recipients without donor-specific antibodies (DSA) defy etiologic classification using C4d staining of peritubular capillaries (C4dptc) and conventional DSA assignment. We evaluated MVI ≥ 2 (Banff g + ptc ≥ 2) using Banff 2019 AMR (independent of MVI ≥ 2 but including C4dptc) with unconventional endothelial C4d staining of glomerular capillaries (C4dglom) and - arterial endothelium and/or intima (C4dart) using tissue immunoperoxidase, shared-eplet and subthreshold DSA (median fluorescence intensity, [MFI] 100-499), and capillary ultrastructure from 3398 kidney transplant samples for evidence of AMR. MVI ≥ 2 (n = 202 biopsies) from 149 kidneys (12.4% prevalence) correlated with DSA+, C4dptc+, C4dglom+, Banff cg, i, t, ti scores, serum creatinine, proteinuria, and graft failure compared with 202 propensity score matched normal controls. The laboratory reported DSA- MVI ≥ 2 (MFI ≥500) occurred in 34.7%; however, subthreshold (28.6%), eplet-directed (51.4%), and/or misclassified anti-Human leukocyte antigen (HLA) DSA (12.9%) were identified in 67.1% by forensic reanalysis, with vascular C4d+ staining in 67.1%, and endothelial abnormalities in 57.1%, totaling 87.1%. Etiologic analysis attributed 62.9% to AMR (77.8% for MVI with negative reported DSA [DSA- MVI ≥2] with glomerulitis) and pure T cellular rejection in 37.1%. C4dptc-DSA- MVI ≥ 2 was unrecognized AMR in 48.0%. Functional outcomes and graft survival were comparable to normal controls. We concluded that DSA- MVI ≥ 2 frequently signified a mild "borderline" phenotype of AMR which was recognizable using novel serologic and pathological techniques.

4.
Proc Biol Sci ; 291(2025): 20240570, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38889779

RESUMO

Konrad Lorenz introduced the concept of a 'baby schema', suggesting that infants have specific physical features, such as a relatively large head, large eyes and protruding cheeks, which function as an innate releaser to promote caretaking motivation from perceivers. Over the years, a large body of research has been conducted on the baby schema. However, there are two critical problems underpinning the current literature. First, the term 'baby schema' lacks consistency among researchers. Some researchers use the term baby schema to refer to infant stimuli (often faces) in comparison with adults (categorical usage), while others use the term to refer to the extent that features contribute to cuteness perception (spectrum usage). Second, cross-species continuity of the 'baby schema' has been assumed despite few empirical demonstrations. The evolutionary and comparative relevance of the concept is, therefore, debatable, and we cannot exclude the possibility that extreme sensitivity to the baby schema is a uniquely human trait. This article critically reviews the state of the existing literature and evaluates the significance of the baby schema from an evolutionary perspective.


Assuntos
Evolução Biológica , Humanos , Lactente , Face/anatomia & histologia
5.
Br J Psychiatry ; 225(1): 274-281, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38602168

RESUMO

BACKGROUND: Higher intensity of psychotherapy might improve treatment outcome in depression, especially in those with comorbid personality disorder. AIMS: To compare the effects of 25 individual sessions (weekly) of two forms of psychotherapy - short-term psychoanalytic supportive psychotherapy (SPSP) and schema therapy - with the same treatments given for 50 sessions (twice weekly) in people with depression and personality disorder. Trial registration: NTR5941. METHOD: We conducted a pragmatic, double-randomised clinical trial and, over 37 months, recruited 246 adult out-patients with comorbid depression/dysthymia and personality disorder. A 2 × 2 factorial design randomised participants to 25 or 50 sessions of SPSP or schema therapy. The primary outcome was change in depression severity over 1 year on the Beck Depression Inventory II (BDI-II). Secondary outcomes were remission both of depression and personality disorder. RESULTS: Compared with 25 sessions, participants who received 50 sessions showed a significantly greater decrease in depressive symptoms over time (time × session dosage, P < 0.001), with a mean difference of 5.6 BDI points after 1 year (d = -0.53, 95% CI -0.18 to 0.882, P = 0.003). Remission from depression was also greater in the 50-session group (74% v. 58%, P = 0.025), as was remission of personality disorder (74% v. 56%, P = 0.010). CONCLUSIONS: Greater intensity of psychotherapy leads to better outcomes of both depression and personality status in people with comorbid depression and personality disorder.


Assuntos
Transtornos da Personalidade , Humanos , Masculino , Feminino , Adulto , Transtornos da Personalidade/terapia , Transtornos da Personalidade/epidemiologia , Pessoa de Meia-Idade , Comorbidade , Psicoterapia Psicodinâmica/métodos , Resultado do Tratamento , Terapia Psicanalítica/métodos , Psicoterapia Breve/métodos , Transtorno Distímico/terapia , Transtorno Distímico/epidemiologia
6.
Horm Behav ; 164: 105595, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38972246

RESUMO

Baby schema features are a specific set of physical features-including chubby cheeks, large, low-set eyes, and a large, round head-that have evolutionary adaptive value in their ability to trigger nurturant care. In this study among nulliparous women (N = 81; M age = 23.60, SD = 0.44), we examined how sensitivity to these baby schema features differs based on individual variations in nurturant care motivation and oxytocin system gene methylation. We integrated subjective ratings with measures of facial expressions and electroencephalography (EEG) in response to infant faces that were manipulated to contain more or less pronounced baby schema features. Linear mixed effects analyses demonstrated that infants with more pronounced baby schema features were rated as cuter and participants indicated greater motivation to take care of them. Furthermore, infants with more pronounced baby schema features elicited stronger smiling responses and enhanced P2 and LPP amplitudes compared to infants with less pronounced baby schema features. Importantly, individual differences significantly predicted baby schema effects. Specifically, women with low OXTR methylation and high nurturance motivation showed enhanced differentiation in automatic neurophysiological responses to infants with high and low levels of baby schema features. These findings highlight the importance of considering individual differences in continued research to further understand the complexities of sensitivity to child cues, including facial features, which will improve our understanding of the intricate neurobiological system that forms the basis of caregiving behavior.


Assuntos
Metilação de DNA , Eletroencefalografia , Expressão Facial , Motivação , Ocitocina , Receptores de Ocitocina , Humanos , Feminino , Motivação/fisiologia , Ocitocina/metabolismo , Ocitocina/genética , Metilação de DNA/fisiologia , Lactente , Receptores de Ocitocina/genética , Adulto Jovem , Adulto , Comportamento Materno/fisiologia , Comportamento do Lactente/fisiologia , Masculino , Relações Mãe-Filho
7.
Gynecol Oncol ; 187: 37-45, 2024 08.
Artigo em Inglês | MEDLINE | ID: mdl-38713997

RESUMO

OBJECTIVE: To assess the prognostic performance of the 2023 International Federation of Gynecology and Obstetrics (FIGO) endometrial cancer staging schema. METHODS: This retrospective cohort study queried the Commission-on-Cancer's National Cancer Database. Study population was 129,146 patients with stage I-IV endometrial cancer per the 2009 FIGO staging schema. Stage-shifting and overall survival (OS) were assessed according to the 2023 FIGO staging schema. RESULTS: Upstage (IA → II, 21.4 %; IB → II, 53.0 %) and downstage (IIIA→IA3, 22.2 %) occurred in both early and advanced diseases. Inter-stage prognostic performance improved in the 2023 schema with widened 5-year OS rate difference between the earliest and highest stages (68.2 % to 76.9 %). Stage IA1-IIB and IIC had distinct 5-year OS rate differences (85.8-96.1 % vs 75.4 %). The 5-year OS rate of the 2009 stage IIIA disease was 63.9 %; this was greater segregated in the 2023 schema: 88.0 %, 62.4 %, and 55.7 % for IIIA→IA3, IIIA1, and IIIA2, respectively (inter-substage rate-difference, 32.3 %). This 5-year OS rate of stage IA3 disease was comparable to the 2023 stage IB-IIB diseases (88.0 % vs 85.8-89.5 %). In the 2023 stage IIIC schema (micrometastasis rates: 29.6 % in IIIC1 and 15.6 % in IIIC2), micrometastasis and macrometastasis had the distinct 3-year OS rates in both pelvic (IIIC1-i vs IIIC1-ii, 84.9 % vs 71.1 %; rate-difference 13.8 %) and para-aortic (IIIC2-i vs IIIC2-ii, 82.9 % vs 65.2 %; rate-difference 17.7 %) nodal metastasis cases. The 5-year OS rate of the 2009 stage IVB disease was 23.4 %; this was segregated to 25.4 % for stage IVB and 19.2 % for stage IVC in the 2023 staging schema (rate-difference, 6.2 %). CONCLUSION: The 2023 FIGO endometrial cancer staging schema is a major revision from the 2009 FIGO schema. Almost doubled enriched sub-stages based on detailed anatomical metastatic site and incorporation of histological information enable more robust prognostication.


Assuntos
Neoplasias do Endométrio , Estadiamento de Neoplasias , Humanos , Feminino , Neoplasias do Endométrio/patologia , Neoplasias do Endométrio/mortalidade , Estudos Retrospectivos , Pessoa de Meia-Idade , Prognóstico , Idoso , Estudos de Coortes , Adulto , Idoso de 80 Anos ou mais
8.
Ann Behav Med ; 58(5): 305-313, 2024 Apr 11.
Artigo em Inglês | MEDLINE | ID: mdl-38546737

RESUMO

BACKGROUND: Black young adult women (ages 18-35) are at disproportionate risk for obesity and emotional eating. Emotional eating interventions target psychological flexibility, such as reducing experiential avoidance and increasing acceptance of food-related thoughts. Yet Black women face gendered racism, and some endorse roles that reduce psychological flexibility, such as the superwoman schema role. Culturally centered stress and coping has often been overlooked, leading to an incomplete understanding of processes that engender emotional eating and the implications for appropriate and effective interventions for Black young adult women. PURPOSE: We investigated direct and indirect pathways of associations between stress from gendered racial microaggressions to emotional eating through the endorsement of superwoman schema and two aspects of psychological flexibility. METHODS: Black young adult women (N = 504; Mage = 24.72; 75.2% African American; 98.4% cisgender) participated in an online survey wherein they reported demographics, stress from gendered racial microaggressions, superwoman schema, experiential avoidance, acceptance of food-related thoughts, and emotional eating. Path analysis was conducted to examine direct and indirect effects. RESULTS: Results provided evidence for indirect associations between more stress from gendered racial microaggressions and more emotional eating. More stress was associated with greater endorsement of the superwoman schema which was associated with more experiential avoidance and less acceptance of food-related thoughts, which were each associated with more emotional eating. CONCLUSIONS: Endorsement of superwoman schema and concomitant avoidance and less acceptance may be one way that gendered racial stress propels emotional eating. Future research could test intervention components that disrupt this path.


Emotional eating is eating in order to alleviate negative emotions, like those from stress. Black young adult women face particular forms of stress from being mistreated at the intersection of their race and gender. This research was needed to better understand processes that engender emotional eating for Black young adult women so that appropriate and effective interventions can be developed for this group. In this correlational study, Black young adult women (ages 18­35) completed an online survey wherein they answered questions about their experiences, thoughts, and behaviors. The study results indicated that stress from mistreatment due to being a Black woman was associated with endorsing a need to be strong. This need to be strong was associated with avoiding experiences that may lead to negative emotional states and being less accepting of distressing thoughts about food. More avoidance and less acceptance were each associated with more emotional eating. Therefore, if emotional eating or obesity-related interventions already target acceptance and avoidance, but do not reference or contextualize them for Black young adult women­particularly in terms of stress from mistreatment as a Black woman and the need to be strong­such interventions may be less effective.


Assuntos
Microagressão , Racismo , Feminino , Humanos , Adulto Jovem , Negro ou Afro-Americano , Capacidades de Enfrentamento , Emoções , Identidade de Gênero , Racismo/psicologia , Adolescente , Adulto
9.
Psychother Psychosom ; 93(1): 24-35, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38176391

RESUMO

INTRODUCTION: Schema therapy (ST) reduces depressive symptoms, but clinical trials have not investigated its effectiveness for patients suffering from severe forms of depression and high rates of comorbidities. There is high demand for exploring and improving treatments for this patient group. The objective of the current study was to evaluate whether ST is more effective than individual supportive therapy (IST) and noninferior compared with cognitive behavioral therapy (CBT) in treating depression. METHODS: For this clinical trial, medicated patients were recruited in inpatient and day clinic settings. The major inclusion criteria were age between 18 and 75 years and primary diagnosis of depression without psychotic symptoms. A total of 292 participants were randomized to ST, CBT, or IST and received 7 weeks of psychotherapy (up to 14 individual and 14 group sessions). The primary outcome was change in depression severity after treatment measured by Beck Depression Inventory-II. Primary test for efficacy was superiority of ST over IST. Secondary test was noninferiority of ST compared with CBT. Multilevel modeling was conducted. The results at 6-month follow-up were explored. RESULTS: Across treatment, ST was not superior to IST. Secondary outcome analyses and completer analyses showed similar results. However, ST showed clinically relevant noninferiority compared with CBT. CONCLUSION: ST for depression as part of a psychiatric care program showed clinical noninferiority compared to CBT, without being superior to IST. ST represents a potentially useful addition to the therapeutic repertoire for the treatment of depression but its efficacy, including long-term efficacy, should be evaluated further.


Assuntos
Terapia Cognitivo-Comportamental , Terapia do Esquema , Humanos , Adolescente , Adulto Jovem , Adulto , Pessoa de Meia-Idade , Idoso , Depressão/terapia , Pacientes Internados , Terapia Cognitivo-Comportamental/métodos , Psicoterapia/métodos , Resultado do Tratamento
10.
Exp Brain Res ; 242(6): 1373-1385, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38565782

RESUMO

BACKGROUND AND OBJECTIVES: Alterations of the sensory-motor body schema question the origins of such distortions. For example, in anorexia nervosa where patients think they are broader than they really are (body image) but act as if it was really the case (body schema). To date, the results of studies about what hinders the updating of the body schema so much (weight, body image) have been contradictory. METHODS: We therefore conducted two studies that aimed to assess the impact of weight and body image problems on body schema in 92 young women without anorexia nervosa. For this purpose, we used a new body schema assessment tool (SKIN) that is sensitive enough to detect fine alterations of body schema in seven different body parts. RESULTS: In Study 1, the thinness or overweight of the young women had a major impact on their tactile perception, especially because the assessed body part was a sensitive area for body dissatisfaction in young women (e.g., belly, thigh). In Study 2, the level of body dissatisfaction of the participants in its attitudinal and perceptual dimension also had a negative impact on their body schema, again in interaction with weight and body part. CONCLUSIONS: These results imply that body dissatisfaction and thinness are predictors of massive body schema distortions. An oversized body schema could maintain various weight-control behaviors, thus risking the development, maintenance, or relapse of an eating disorder.


Assuntos
Imagem Corporal , Peso Corporal , Humanos , Feminino , Imagem Corporal/psicologia , Adulto Jovem , Peso Corporal/fisiologia , Adulto , Estudantes/psicologia , Adolescente , Universidades , Insatisfação Corporal , Inquéritos e Questionários , Percepção do Tato/fisiologia
11.
Dev Sci ; 27(3): e13455, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-37926863

RESUMO

Developmental coordination disorder (DCD) impacts the quality of life and ability to perform coordinated actions in 5% of school-aged children. The quality of body representations of individuals with DCD has been questioned, but never assessed. We hypothesize that children with DCD have imprecise body representations in the sensory and motor domains. Twenty neurotypical children, seventeen children with DCD (8-12 years old) and twenty neurotypical adults (25-45 years old) performed both sensory and motor body representation tasks: a limb identification and a limb movement task. We observed lower accuracy in the sensory task but not in the motor task. In both tasks, we observe a larger amplitude of errors, or synkinesis, in children with DCD than in neurotypical children. In neurotypical children, accuracy was lower than in neurotypical adults in the motor and sensory task, and the amplitude of sensory errors and synkinesis was higher than in neurotypical adults. Using a linear regression model, we showed that sensory accuracy is a good predictor of synkinesis production, and that synkinesis production is a good predictor of sensory accuracy, as can be expected by the perception-action loop. Results support the hypothesis of an imprecision of body representation in DCD. We suggest that this imprecision arises from noise in the body representation used at the level of internal models of action. Future studies may assess whether slower plasticity of body representations, initial imprecision, or both may account for this observation. At the clinical level, prevention strategies targeting body representation in early childhood are strategically important to limit such impairments. RESEARCH HIGHLIGHTS: Body representation is impaired in children with DCD and has a significant cost in terms of the accuracy of sensory identification of body parts and associated movements. Inaccuracies in the body representation measured in perception and in action (error amplitude and synkinesis) are related in both NT children and adults. In typical development, we provide evidence of a strong link between body schema and body image.


Assuntos
Transtornos das Habilidades Motoras , Sincinesia , Pré-Escolar , Criança , Adulto , Humanos , Pessoa de Meia-Idade , Imagem Corporal , Qualidade de Vida , Movimento , Destreza Motora
12.
J Biomed Inform ; 151: 104602, 2024 03.
Artigo em Inglês | MEDLINE | ID: mdl-38346530

RESUMO

OBJECTIVE: An applied problem facing all areas of data science is harmonizing data sources. Joining data from multiple origins with unmapped and only partially overlapping features is a prerequisite to developing and testing robust, generalizable algorithms, especially in healthcare. This integrating is usually resolved using meta-data such as feature names, which may be unavailable or ambiguous. Our goal is to design methods that create a mapping between structured tabular datasets derived from electronic health records independent of meta-data. METHODS: We evaluate methods in the challenging case of numeric features without reliable and distinctive univariate summaries, such as nearly Gaussian and binary features. We assume that a small set of features are a priori mapped between two datasets, which share unknown identical features and possibly many unrelated features. Inter-feature relationships are the main source of identification which we expect. We compare the performance of contrastive learning methods for feature representations, novel partial auto-encoders, mutual-information graph optimizers, and simple statistical baselines on simulated data, public datasets, the MIMIC-III medical-record changeover, and perioperative records from before and after a medical-record system change. Performance was evaluated using both mapping of identical features and reconstruction accuracy of examples in the format of the other dataset. RESULTS: Contrastive learning-based methods overall performed the best, often substantially beating the literature baseline in matching and reconstruction, especially in the more challenging real data experiments. Partial auto-encoder methods showed on-par matching with contrastive methods in all synthetic and some real datasets, along with good reconstruction. However, the statistical method we created performed reasonably well in many cases, with much less dependence on hyperparameter tuning. When validating feature match output in the EHR dataset we found that some mistakes were actually a surrogate or related feature as reviewed by two subject matter experts. CONCLUSION: In simulation studies and real-world examples, we find that inter-feature relationships are effective at identifying matching or closely related features across tabular datasets when meta-data is not available. Decoder architectures are also reasonably effective at imputing features without an exact match.


Assuntos
Algoritmos , Registros Eletrônicos de Saúde , Simulação por Computador , Ciência de Dados , Motivação
13.
J Biomed Inform ; 155: 104659, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38777085

RESUMO

OBJECTIVE: This study aims to promote interoperability in precision medicine and translational research by aligning the Observational Medical Outcomes Partnership (OMOP) and Phenopackets data models. Phenopackets is an expert knowledge-driven schema designed to facilitate the storage and exchange of multimodal patient data, and support downstream analysis. The first goal of this paper is to explore model alignment by characterizing the common data models using a newly developed data transformation process and evaluation method. Second, using OMOP normalized clinical data, we evaluate the mapping of real-world patient data to Phenopackets. We evaluate the suitability of Phenopackets as a patient data representation for real-world clinical cases. METHODS: We identified mappings between OMOP and Phenopackets and applied them to a real patient dataset to assess the transformation's success. We analyzed gaps between the models and identified key considerations for transforming data between them. Further, to improve ambiguous alignment, we incorporated Unified Medical Language System (UMLS) semantic type-based filtering to direct individual concepts to their most appropriate domain and conducted a domain-expert evaluation of the mapping's clinical utility. RESULTS: The OMOP to Phenopacket transformation pipeline was executed for 1,000 Alzheimer's disease patients and successfully mapped all required entities. However, due to missing values in OMOP for required Phenopacket attributes, 10.2 % of records were lost. The use of UMLS-semantic type filtering for ambiguous alignment of individual concepts resulted in 96 % agreement with clinical thinking, increased from 68 % when mapping exclusively by domain correspondence. CONCLUSION: This study presents a pipeline to transform data from OMOP to Phenopackets. We identified considerations for the transformation to ensure data quality, handling restrictions for successful Phenopacket validation and discrepant data formats. We identified unmappable Phenopacket attributes that focus on specialty use cases, such as genomics or oncology, which OMOP does not currently support. We introduce UMLS semantic type filtering to resolve ambiguous alignment to Phenopacket entities to be most appropriate for real-world interpretation. We provide a systematic approach to align OMOP and Phenopackets schemas. Our work facilitates future use of Phenopackets in clinical applications by addressing key barriers to interoperability when deriving a Phenopacket from real-world patient data.


Assuntos
Unified Medical Language System , Humanos , Semântica , Registros Eletrônicos de Saúde , Medicina de Precisão/métodos , Pesquisa Translacional Biomédica , Informática Médica/métodos , Processamento de Linguagem Natural , Doença de Alzheimer
14.
Cereb Cortex ; 33(10): 5968-5980, 2023 05 09.
Artigo em Inglês | MEDLINE | ID: mdl-36520467

RESUMO

Schemas provide a scaffold onto which we can integrate new memories. Previous research has investigated the brain activity and connectivity underlying schema-related memory formation. However, how schemas are represented and reactivated in the brain, in order to enhance memory, remains unclear. To address this issue, we used an object-location spatial schema that was learned over multiple sessions, combined with similarity analyses of neural representations, to investigate the reactivation of schema representations of object-location memories when a new object-scene association is learned. In addition, we investigated how this reactivation affects subsequent memory performance under different strengths of schemas. We found that reactivation of a schema representation in the lateral occipital cortex (LOC) during object-scene encoding affected subsequent associative memory performance only in the schema-consistent condition and increased the functional connectivity between the LOC and the parahippocampal place area. Taken together, our findings provide new insight into how schema acts as a scaffold to support the integration of novel information into existing cortical networks and suggest a neural basis for schema-induced rapid cortical learning.


Assuntos
Encéfalo , Aprendizagem , Encéfalo/fisiologia , Lobo Occipital , Mapeamento Encefálico , Cognição , Imageamento por Ressonância Magnética
15.
Conscious Cogn ; 117: 103630, 2024 01.
Artigo em Inglês | MEDLINE | ID: mdl-38183843

RESUMO

Seeing an embodied humanoid avatar move its arms can induce in the observer the illusion that its own (static) arms are moving accordingly, the kinematic signals emanating from this avatar thus being considered like those from the biological body. Here, we investigated the causal relationship between these kinaesthetic illusions and the illusion of body ownership, manipulated through visuomotor synchronisation. The results of two experiments revealed that the sense of body ownership over an avatar seen from a first-person perspective was intimately linked to visuomotor synchrony. This was not the case for kinaesthetic illusions indicating that when superimposed on the biological body, the avatar is inevitably treated at the sensorimotor level as one's own body, whether consciously considered as such or not. The question of whether these two bodily experiences (body ownership and kinaesthetic illusion) are underpinned by distinct representations, the body image, and the body schema, is discussed.


Assuntos
Ilusões , Percepção do Tato , Humanos , Propriedade , Estado de Consciência , Imagem Corporal , Percepção Visual , Mãos
16.
Arch Sex Behav ; 53(1): 375-382, 2024 01.
Artigo em Inglês | MEDLINE | ID: mdl-37989988

RESUMO

Sexual self-schemas (SSSs) are cognitive generalizations about one's sexual aspects. The aim of this study was to explore the possible effects of intimate partner violence (IPV) and the sexual myths about sexual behavior or roles on women's sexual self-schemas. The research had a cross-sectional and observational design. Fifty women from a psychiatry outpatient clinic between the ages of 18-50 were given the Sexual Self-Schema Scale, sexual myths questionnaire, Beck Depression Inventory, Beck Anxiety Inventory, Golombok-Rust Inventory of Sexual Satisfaction, and Domestic Violence Against Women Scale. A significant relationship was found between the duration of marriage (years) and "Direct/Outspoken" schema (p = .020, r = 0.29). This schema was also correlated with emotional (p = .037, r = - 0.29), total violence score (p = .028, r = - 0.27), and sexual myth score (p = .033, r = 0.26). After the regression analysis, it was observed that the effect of emotional violence and sexual myth score on the "Direct/Outspoken" schema remained significant. Correcting sexual myths through sexual education can make women's SSSs into positive way. In addition, interventions can be made to increase SSSs positively in women exposed to IPV. It is recommended that clinicians take a holistic approach by questioning the sexual functions and schemas of women in addition to IPV in women who experience it and have depression or anxiety disorders. As a policy implication, education about women's rights and sexuality should also be given. Adequate psychological support should be provided to reduce the impact of IPV on SSS.


Assuntos
Violência por Parceiro Íntimo , Adolescente , Adulto , Feminino , Humanos , Pessoa de Meia-Idade , Adulto Jovem , Estudos Transversais , Escolaridade , Violência por Parceiro Íntimo/psicologia , Fatores de Risco , Comportamento Sexual , Parceiros Sexuais/psicologia , Inquéritos e Questionários
17.
BMC Psychiatry ; 24(1): 40, 2024 01 10.
Artigo em Inglês | MEDLINE | ID: mdl-38200491

RESUMO

BACKGROUND: Depression is a major global health challenge, affecting over 300 million people worldwide. Current pharmacological and psychotherapeutic interventions have limited efficacy, underscoring the need for novel approaches. Emerging evidence suggests that peak emotional experiences characterized by awe, transcendence, and meaning hold promise for rapidly shifting maladaptive cognitive patterns in depression. Aesthetic chills, a peak positive emotion characterized by physical sensations such as shivers and goosebumps, may influence reward-related neural pathways and hold promise for modifying core maladaptive beliefs rooted in early adverse experiences. METHODS: We enrolled 96 patients diagnosed with major depressive disorder. A validated database of multimedia known to elicit chills responses (ChillsDB) was used for stimulus presentation. Participants' emotional responses were assessed using the Emotional Breakthrough Inventory (EBI), while shifts in self-schema were measured via the Young Positive Schema Questionnaire (YSPQ). RESULTS: The study found that chill-inducing stimuli have the potential to positively influence the core schema of individuals with depression, impacting areas of self-related beliefs. The associated phenomenology triggered by chills appears to share similarities with the altered states of consciousness induced by psychedelic substances like psilocybin. CONCLUSIONS: These preliminary results suggest that the biological processes involved in aesthetic chills could be harnessed as a non-pharmacological intervention for depression. However, further investigation is necessary to comprehensively understand the neurophysiological responses to chills and to evaluate the practicality, effectiveness, and safety of utilizing aesthetic chills as a preventive measure in mental health care.


Assuntos
Depressão , Transtorno Depressivo Maior , Humanos , Depressão/terapia , Transtorno Depressivo Maior/terapia , Cognição , Bases de Dados Factuais , Estética
18.
BMC Psychiatry ; 24(1): 725, 2024 Oct 23.
Artigo em Inglês | MEDLINE | ID: mdl-39443890

RESUMO

BACKGROUND: Bernstein's heuristic model of personal strengths describes 16 positive attributes of the healthy adult self, grouped into four higher-order factors: self-directedness (identity, self-reflection, self-confidence, self-assertion, imagination/creativity), self-regulation (emotional balance, resilience, self-control, self-care, reality testing), connection (empathy, compassion, humour, responsibility), and transcendence (gratitude and wisdom). The study aimed to explore the factorial validity of Bernstein's Strengths Scale developed for the assessment of these constructs. Furthermore, we explored the association of strengths with attention-deficit hyperactivity (ADHD) symptoms and mental health in a nonclinical sample using a network approach. METHODS: Five hundred and twenty-eight adults filled out an online questionnaire, including Bernstein's Strengths Scale (BSS), the Mental Health Continuum - Short Form (MHC-SF), and the Adult ADHD Self-Report Scale (ASRS). RESULTS: Though our data showed an acceptable fit to the 16-factor model, the Self-control subscale and item 28 of the Compassion subscale were excluded because of reliability issues. The final model with 15 factors and 44 items showed excellent fit, χ2(797) = 1130.149, p < .001, RMSEA = 0.028, 90% CI [0.024, 0.032], SRMS = 0.049, CFI = 0.993, TLI = 0.991. Principal component analysis revealed three instead of four second-order factors. In the network model, Self-confidence and Wisdom emerged as the most influential nodes. ADHD symptoms were negatively connected to Responsibility, Self-care, Identity, Emotional balance, Self-confidence, and mental health, while they had positive edges with Humor, Self-reflection, and Imagination/creativity. Mental health was positively related to several strengths, with the strongest association being between mental health and Gratitude. CONCLUSION: The BSS has acceptable factorial validity and is a reliable tool for assessing the personal strengths of the healthy adult self. ADHD symptoms in adults may be associated with deficits in personal strengths, but protective factors could also be identified. Addressing personal strengths in psychosocial interventions for ADHD in adults may improve patients' emotional well-being and everyday functioning.


Assuntos
Transtorno do Deficit de Atenção com Hiperatividade , Autoimagem , Humanos , Transtorno do Deficit de Atenção com Hiperatividade/psicologia , Transtorno do Deficit de Atenção com Hiperatividade/diagnóstico , Adulto , Feminino , Masculino , Reprodutibilidade dos Testes , Adulto Jovem , Saúde Mental , Pessoa de Meia-Idade , Análise Fatorial , Psicometria , Inquéritos e Questionários/normas , Adolescente , Empatia/fisiologia
19.
Int Rev Psychiatry ; 36(1-2): 18-30, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38557338

RESUMO

Ida B. Wells (1862-1931) led an extraordinary life as a journalist, educator, and activist while navigating the intersecting social realities of race, gender, and class. She embodied courage, advocating for the civil rights of Black Americans in an uncompromising fashion.Building on decades of research in social psychology, sociologist Cecilia L. Ridgeway presents (2019) a cultural schema theory of status. She contends that issues of status in interpersonal contexts are an unavoidable aspect of the human condition. Despite the ubiquity of status as a sociocultural force, Ridgeway believes that status hierarchies may be undermined.The present study is a psychobiographical exploration of Wells through the lens of Ridgeway's status theory. It explores: the development of Wells' cultural schemas; how Wells navigated her own status; the inter-relationship between Wells and her sociocultural context; and how Wells undermined and overcame status hierarchies.

20.
Mem Cognit ; 52(3): 663-679, 2024 04.
Artigo em Inglês | MEDLINE | ID: mdl-38228995

RESUMO

The ability to generate novel ideas, known as divergent thinking, depends on both semantic knowledge and episodic memory. Semantic knowledge and episodic memory are known to interact to support memory decisions, but how they may interact to support divergent thinking is unknown. Moreover, it is debated whether divergent thinking relies on spontaneous or controlled retrieval processes. We addressed these questions by examining whether divergent thinking ability relates to interactions between semantic knowledge and different episodic memory processes. Participants completed the alternate uses task of divergent thinking, and completed a memory task in which they searched for target objects in schema-congruent or schema-incongruent locations within scenes. In a subsequent test, participants indicated where in each scene the target object had been located previously (i.e., spatial accuracy test), and provided confidence-based recognition memory judgments that indexed distinct episodic memory processes (i.e., recollection, familiarity, and unconscious memory) for the scenes. We found that higher divergent thinking ability-specifically in terms of the number of ideas generated-was related to (1) more of a benefit from recollection (a controlled process) and unconscious memory (a spontaneous process) on spatial accuracy and (2) beneficial differences in how semantic knowledge was combined with recollection and unconscious memory to influence spatial accuracy. In contrast, there were no effects with respect to familiarity (a spontaneous process). These findings indicate that divergent thinking is related to both controlled and spontaneous memory processes, and suggest that divergent thinking is related to the ability to flexibly combine semantic knowledge with episodic memory.


Assuntos
Memória Episódica , Humanos , Pensamento , Reconhecimento Psicológico , Semântica , Julgamento , Rememoração Mental
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