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1.
J Affect Disord ; 2024 Sep 24.
Artículo en Inglés | MEDLINE | ID: mdl-39326584

RESUMEN

BACKGROUND: Repetitive negative thinking (RNT), particularly its brooding aspect, is a prominent feature in Major Depressive Disorder (MDD) with and without comorbid anxiety. Error processing, an adaptive cognitive operation, seems to be impaired in individuals with exaggerated RNT. This study measured a post-error neural response, error-related negativity (ERN), during an inhibitory task to examine the mechanism underlying the relationship between RNT and faulty error processing. METHODS: We examined current MDD patients with (n = 61) and without comorbid anxiety disorders (COM; n = 38), propensity-matched into High- or Low-RNT groups according to Ruminative Response Scale Brooding subscale scores. Using 32-channel electroencephalography (EEG) during a stop-signal task, we measured baseline-corrected ERN amplitude at FCz 0-100 ms after an incorrect response. A between-subjects ANOVA was conducted with group (High RNT, Low RNT) and comorbidity (MDD, COM) as factors. RESULTS: A significant group-by-comorbidity interaction (η2 = 0.07) was found, with MDD participants exhibiting high RNT revealing smaller (more positive) ERN amplitudes compared to their COM counterparts with high RNT (d = 0.77) and MDD participants with low RNT (d = 0.92). CONCLUSIONS: Non-anxious individuals with MDD and high RNT showed blunted post-error neural responses, potentially indicating a diminished adaptive neural mechanism for recognizing and correcting errors. However, the presence of comorbid anxiety disorders in individuals with high RNT appears to counteract this reduction, potentially through an enhanced neural response to errors, thereby maintaining a higher level of error-processing activity. Further understanding of these relationships is essential for developing targeted interventions for MDD, with particular focus on the detrimental impact of brooding RNT.

2.
J Affect Disord ; 367: 923-933, 2024 Sep 05.
Artículo en Inglés | MEDLINE | ID: mdl-39243820

RESUMEN

BACKGROUND: Despite preliminary evidence that links impulsivity to suicide risk among Native American youth, impulsivity has not been directly studied in relation to suicide ideation (SI) or behaviors in this population. We examined indexes of rapid-response impulsivity (RRI) across multiple levels of analysis (self-report, behavioral, neurobiological) and associations with SI among Native American youth ages 9-10 in the Adolescent Brain Cognitive Development Study. METHODS: Data from the sample (n = 284) included self-report (UPPS-P), behavioral (Stop Signal Task), and neurobiological (right inferior frontal gyrus activation) indicators of RRI. RRI indicators were modeled using variable-centered (i.e., traditional multivariable regression) and person-centered (i.e., clustering analyses) approaches in measuring their association with SI. RESULTS: Logistic regression analysis demonstrated that higher negative urgency was associated with higher odds of SI (Adjusted Odds Ratio = 1.23, p = 0.015). Latent profile analysis clustered youth into five profiles based on within-individual variation in RRI indicators. Youth with an elevated self-reported negative and positive urgency profile had higher odds of reporting SI than "normative" youth (Adjusted Odds Ratio = 2.38, p = 0.019). LIMITATIONS: Limitations of this study include the modest sample size particularly regarding SI (14.1 %), potential bias in estimates of lifetime SI, and generalizability to youth from specific Native American communities. CONCLUSIONS: Negative urgency may increase risk for SI among Native American youth in late childhood. Clinical implications, including the potential for person-centered RRI profiles to act as candidate markers of suicide risk and resilience in adolescence and inform safety assessments and planning, are discussed.

3.
J Affect Disord ; 362: 779-787, 2024 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-39029684

RESUMEN

BACKGROUND: Reward processing dysfunction is a core characteristic of major depressive disorder (MDD), yet event-related potential (ERP) research in MDD has predominantly focused on reward receipt as opposed to anticipation. The stimulus-preceding negativity (SPN) ERP reflects anticipatory brain processing. This study examines whether individuals with MDD exhibit deficits during reward anticipation as evidenced by altered SPN amplitude. METHODS: We assessed prefeedback-SPN amplitudes during a monetary incentive delay (MID) task in individuals with MDD (n = 142, 99 with comorbid anxiety disorders [MDD + ANX]) compared to Controls (n = 37). A mixed analysis of variance was performed on prefeedback-SPN amplitude and behavioral measures, with group (MDD, MDD + ANX, Control) as the between-subjects factor, and feedback (gain, loss) and electrode (F3, F4, Fz, C3, C4, Cz, P3, P4, Pz) as within-subjects factors. RESULTS: A group main effect revealed faster reaction times for the Control group than MDD and MDD + ANX groups. A group x feedback interaction indicated that the MDD subgroup had smaller prefeedback-SPN amplitudes than MDD + ANX and Control groups when anticipating gain feedback. Additionally, individuals with current MDD, irrespective of past MDD and comorbid anxiety, exhibited smaller SPN amplitudes than Controls prior to gain feedback. LIMITATIONS: The MID paradigm, designed for functional magnetic resonance imaging (fMRI) data acquisition, lacks optimization for ERP analysis. Moreover, the clinical groups included more females than the Control group. CONCLUSIONS: Reduced resource allocation to reward anticipation may differentiate MDD from MDD + ANX and Control groups. Further investigation of the neural mechanisms of distinct MDD phenotypes is warranted.


Asunto(s)
Anticipación Psicológica , Trastorno Depresivo Mayor , Electroencefalografía , Potenciales Evocados , Recompensa , Humanos , Trastorno Depresivo Mayor/fisiopatología , Trastorno Depresivo Mayor/psicología , Trastorno Depresivo Mayor/diagnóstico por imagen , Femenino , Masculino , Adulto , Potenciales Evocados/fisiología , Anticipación Psicológica/fisiología , Trastornos de Ansiedad/fisiopatología , Trastornos de Ansiedad/psicología , Tiempo de Reacción/fisiología , Persona de Mediana Edad , Adulto Joven , Motivación/fisiología , Encéfalo/fisiopatología , Encéfalo/diagnóstico por imagen
4.
Psychol Sport Exerc ; 74: 102679, 2024 09.
Artículo en Inglés | MEDLINE | ID: mdl-38797225

RESUMEN

Physical activity, beneficial for physical and psychological health, may facilitate affective mechanisms of positive emotion and approach-motivation. Greater resting frontal alpha asymmetry (FAA), an index of greater relative left than right frontal cortical activity, is a neural correlate of affective mechanisms possibly associated with active lifestyles. This study sought to amplify limited literature on the relationship between physical (in)activity, FAA, and gender differences. College students (n = 70) self-reported physical activity (Total PA) and sedentary activity (Total Sitting) via the International Physical Activity Questionnaire-Short Form (IPAQ-SF), followed by a resting electroencephalography session to record FAA. A Total PA × gender interaction (ß = 0.462, t = 3.163, p = 0.002) identified a positive relationship between Total PA and FAA in women (ß = 0.434, t = 2.221, p = 0.030) and a negative relationship for men (ß = -0.338, t = -2.300, p = 0.025). Total Sitting was positively linked to FAA (ß = 0.288, t = 2.228, p = 0.029; no gender effect). Results suggest affective mechanisms reflected by FAA (e.g., positive emotion, approach-motivation) are associated with physical activity for women, indicating a possible mechanism of the psychological benefits linked with physically active lifestyles. A positive relationship between sedentary behavior and greater left FAA may also reflect motivated mechanisms of behavior that aid in minimizing energy expenditure, particularly within the context of our highly active sample.


Asunto(s)
Ejercicio Físico , Conducta Sedentaria , Humanos , Femenino , Masculino , Adulto Joven , Ejercicio Físico/fisiología , Ejercicio Físico/psicología , Factores Sexuales , Ritmo alfa/fisiología , Lóbulo Frontal/fisiología , Electroencefalografía , Adulto , Adolescente , Autoinforme
5.
Neuropsychopharmacology ; 49(8): 1246-1254, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38291167

RESUMEN

Hyperarousal symptoms in generalized anxiety disorder (GAD) are often incongruent with the observed physiological state, suggesting that abnormal processing of interoceptive signals is a characteristic feature of the disorder. To examine the neural mechanisms underlying interoceptive dysfunction in GAD, we evaluated whether adrenergic modulation of cardiovascular signaling differentially affects the heartbeat-evoked potential (HEP), an electrophysiological marker of cardiac interoception, during concurrent electroencephalogram and functional magnetic resonance imaging (EEG-fMRI) scanning. Intravenous infusions of the peripheral adrenergic agonist isoproterenol (0.5 and 2.0 micrograms, µg) were administered in a randomized, double-blinded and placebo-controlled fashion to dynamically perturb the cardiovascular system while recording the associated EEG-fMRI responses. During the 0.5 µg isoproterenol infusion, the GAD group (n = 24) exhibited significantly larger changes in HEP amplitude in an opposite direction than the healthy comparison (HC) group (n = 24). In addition, the GAD group showed significantly larger absolute HEP amplitudes than the HC group during saline infusions, when cardiovascular tone did not increase. No significant group differences in HEP amplitude were identified during the 2.0 µg isoproterenol infusion. Using analyzable blood oxygenation level-dependent fMRI data from participants with concurrent EEG-fMRI data (21 GAD and 21 HC), we found that the aforementioned HEP effects were uncorrelated with fMRI signals in the insula, ventromedial prefrontal cortex, dorsal anterior cingulate cortex, amygdala, and somatosensory cortex, brain regions implicated in cardiac signal processing in prior fMRI studies. These findings provide additional evidence of dysfunctional cardiac interoception in GAD and identify neural processes at the electrophysiological level that may be independent from blood oxygen level-dependent responses during peripheral adrenergic stimulation.


Asunto(s)
Trastornos de Ansiedad , Electroencefalografía , Frecuencia Cardíaca , Isoproterenol , Imagen por Resonancia Magnética , Humanos , Masculino , Femenino , Adulto , Trastornos de Ansiedad/fisiopatología , Frecuencia Cardíaca/efectos de los fármacos , Frecuencia Cardíaca/fisiología , Método Doble Ciego , Isoproterenol/farmacología , Isoproterenol/administración & dosificación , Adulto Joven , Encéfalo/fisiopatología , Encéfalo/efectos de los fármacos , Encéfalo/diagnóstico por imagen , Potenciales Evocados/efectos de los fármacos , Potenciales Evocados/fisiología , Interocepción/fisiología , Interocepción/efectos de los fármacos , Agonistas Adrenérgicos beta/administración & dosificación , Agonistas Adrenérgicos beta/farmacología
8.
Psychiatry Res Neuroimaging ; 335: 111712, 2023 10.
Artículo en Inglés | MEDLINE | ID: mdl-37660442

RESUMEN

Research suggests that traditional cultural factors are protective against mental health conditions in American Indian (AI) populations. This study aims to determine if cognitive control is a neurocognitive mechanism of the protective role of spirituality in AI people with generalized anxiety disorder (GAD). Participants self-identified as AI (n = 52) and included individuals with GAD (n = 16) and without GAD (n = 36). Electroencephalography was collected during a stop-signal task to probe cognitive control using the P3 event-related potential. Higher levels of spirituality attenuated the processing efficiency disruption among individuals with GAD as indicated by P3 amplitudes closer to that of individuals without GAD.


Asunto(s)
Indio Americano o Nativo de Alaska , Trastornos de Ansiedad , Espiritualidad , Humanos , Trastornos de Ansiedad/psicología , Cognición , Electroencefalografía , Potenciales Evocados
9.
medRxiv ; 2023 Dec 22.
Artículo en Inglés | MEDLINE | ID: mdl-37398268

RESUMEN

Hyperarousal symptoms in generalized anxiety disorder (GAD) are often incongruent with the observed physiological state, suggesting that abnormal processing of interoceptive signals is a characteristic feature of the disorder. To examine the neural mechanisms underlying interoceptive dysfunction in GAD, we evaluated whether adrenergic modulation of cardiovascular signaling differentially affects the heartbeat evoked potential (HEP), an electrophysiological marker of cardiac interoception, during concurrent electroencephalogram and functional magnetic resonance imaging (EEG-fMRI) scanning. Intravenous infusions of the peripheral adrenergic agonist isoproterenol (0.5 and 2.0 micrograms, µg) were administered in a randomized, double-blinded and placebo-controlled fashion to dynamically perturb the cardiovascular system while recording the associated EEG-fMRI responses. During the 0.5 µg isoproterenol infusion, the GAD group (n=24) exhibited significantly larger changes in HEP amplitude in an opposite direction than the HC group (n=24). In addition, the GAD group showed significantly larger absolute HEP amplitudes than HC during saline infusions, when cardiovascular tone did not increase. No significant group differences in HEP amplitude were identified during the 2.0 µg isoproterenol infusion. Using analyzable blood oxygenation level dependent fMRI data from participants with concurrent EEG-fMRI data (21 GAD and 21 HC), we found that the aforementioned HEP effects were uncorrelated with fMRI signals in the insula, ventromedial prefrontal cortex, dorsal anterior cingulate cortex, amygdala, and somatosensory cortex, brain regions implicated in cardiac signal processing according to prior fMRI studies. These findings provide additional evidence of dysfunctional cardiac interoception in GAD and identify neural processes at the electrophysiological level that may be independent from blood oxygen level-dependent responses during peripheral adrenergic stimulation.

10.
Nat Commun ; 14(1): 3398, 2023 06 13.
Artículo en Inglés | MEDLINE | ID: mdl-37311748

RESUMEN

Understanding the neural processes governing the human gut-brain connection has been challenging due to the inaccessibility of the body's interior. Here, we investigated neural responses to gastrointestinal sensation using a minimally invasive mechanosensory probe by quantifying brain, stomach, and perceptual responses following the ingestion of a vibrating capsule. Participants successfully perceived capsule stimulation under two vibration conditions (normal and enhanced), as evidenced by above chance accuracy scores. Perceptual accuracy improved significantly during the enhanced relative to normal stimulation, which was associated with faster stimulation detection and reduced reaction time variability. Capsule stimulation induced late neural responses in parieto-occipital electrodes near the midline. Moreover, these 'gastric evoked potentials' showed intensity-dependent increases in amplitude and were significantly correlated with perceptual accuracy. Our results replicated in a separate experiment, and abdominal X-ray imaging localized most capsule stimulations to the gastroduodenal segments. Combined with our prior observation that a Bayesian model is capable of estimating computational parameters of gut-brain mechanosensation, these findings highlight a unique form of enterically-focused sensory monitoring within the human brain, with implications for understanding gut feelings and gut-brain interactions in healthy and clinical populations.


Asunto(s)
Encéfalo , Emociones , Humanos , Teorema de Bayes , Encéfalo/diagnóstico por imagen , Electrodos , Estado de Salud
11.
Dev Psychopathol ; 35(5): 2241-2252, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-37345444

RESUMEN

American Indians and Alaska Natives suffer from disproportionately high rates of chronic mental and physical health conditions. These health inequities are linked to colonization and its downstream consequences. Most of the American Indian and Alaska Native health inequities research uses a deficit framework, failing to acknowledge the resilience of American Indian and Alaska Native people despite challenging historical and current contexts. This scoping review is based on a conceptual model which acknowledges the context of colonization and its consequences (psychological and health risk factors). However, rather than focusing on health risk, we focus on protective factors across three identified domains (social, psychological, and cultural/spiritual), and summarize documented relationships between these resilience factors and health outcomes. Based on the scoping review of the literature, we note gaps in extant knowledge and recommend future directions. The findings summarized here can be used to inform and shape future interventions which aim to optimize health and well-being in American Indian and Alaska Native peoples.


Asunto(s)
Nativos Alasqueños , Indígenas Norteamericanos , Resiliencia Psicológica , Humanos , Indio Americano o Nativo de Alaska , Indígenas Norteamericanos/psicología , Alaska
12.
Addiction ; 118(9): 1787-1800, 2023 09.
Artículo en Inglés | MEDLINE | ID: mdl-37132044

RESUMEN

AIMS: This study aimed to test whether there are sex differences in the relationship between impulsivity and amphetamine use disorder (AMP). DESIGN: A naturalistic cross-sectional design was used. SETTING: The Tulsa 1000 study was held in Tulsa, OK, USA. PARTICIPANTS: There were two groups in this study: AMP+ (29F, 20M) and AMP- (57F, 33M). MEASUREMENTS: This project focuses on data related to impulsivity: UPPS-P impulsive behavior scale and a stop signal task (SST) during functional magnetic resonance imaging (fMRI) recording. Group, sex and their interaction were compared for UPPS-P ratings and SST fMRI and behavioral responses. FINDINGS: AMP+ reported higher UPPS-P positive and negative urgency scores (Ps < 0.001; r = 0.56 and 0.51) and displayed greater bilateral insula and amygdala responses across correct SST trials (Ps < 0.001, g range = 0.57-0.81) than AMP-. fMRI results indicated that AMP+ exhibited larger right anterior/middle insula, amygdala and nucleus accumbens signals during successful difficult stop trials than AMP- (Ps < 0.01; g = 0.63, 0.54 and 0.44, respectively). Crucially, two group × sex effects emerged: (a) within females, AMP+ reported larger UPPS-P lack of premeditation scores than AMP- (P < 0.001, r = 0.51), and (b) within males, AMP+ showed greater left middle insula signals than AMP- across correct SST trials (P = 0.01, g = 0.78). CONCLUSIONS: Both female and male amphetamine users appear to be characterized by rash action in the presence of positive and negative mood states as well as heightened recruitment of right hemisphere regions during behavioral inhibition. In contrast, planning ahead may be particularly difficult for female amphetamine users, whereas male amphetamine users may need to recruit additional left hemisphere resources during inhibitory processing.


Asunto(s)
Caracteres Sexuales , Trastornos Relacionados con Sustancias , Humanos , Masculino , Femenino , Estudios Transversales , Conducta Impulsiva/fisiología , Anfetaminas
13.
Arch Public Health ; 81(1): 71, 2023 Apr 26.
Artículo en Inglés | MEDLINE | ID: mdl-37101194

RESUMEN

BACKGROUND: In recent years public health research has shifted to more strengths or asset-based approaches to health research but there is little understanding of what this concept means to Indigenous researchers. Therefore our purpose was to define an Indigenous strengths-based approach to health and well-being research. METHODS: Using Group Concept Mapping, Indigenous health researchers (N = 27) participated in three-phases. Phase 1: Participants provided 218 unique responses to the focus prompt "Indigenous Strengths-Based Health and Wellness Research…" Redundancies and irrelevant statements were removed using content analysis, resulting in a final set of 94 statements. Phase 2: Participants sorted statements into groupings and named these groupings. Participants rated each statement based on importance using a 4-point scale. Hierarchical cluster analysis was used to create clusters based on how statements were grouped by participants. Phase 3: Two virtual meetings were held to share and invite researchers to collaboratively interpret results. RESULTS: A six-cluster map representing the meaning of Indigenous strengths-based health and wellness research was created. Results of mean rating analysis showed all six clusters were rated on average as moderately important. CONCLUSIONS: The definition of Indigenous strengths-based health research, created through collaboration with leading AI/AN health researchers, centers Indigenous knowledges and cultures while shifting the research narrative from one of illness to one of flourishing and relationality. This framework offers actionable steps to researchers, public health practitioners, funders, and institutions to promote relational, strengths-based research that has the potential to promote Indigenous health and wellness at individual, family, community, and population levels.

14.
Drug Alcohol Depend ; 246: 109852, 2023 05 01.
Artículo en Inglés | MEDLINE | ID: mdl-37003108

RESUMEN

Research suggests that disproportionate exposure to risk factors places American Indian (AI) peoples at higher risk for substance use disorders (SUD). Although SUD is linked to striatal prioritization of drug rewards over other appetitive stimuli, there are gaps in the literature related to the investigation of aversive valuation processing, and inclusion of AI samples. To address these gaps, this study compared striatal anticipatory gain and loss processing between AI-identified with SUD (SUD+; n = 52) and without SUD (SUD-; n = 35) groups from the Tulsa 1000 study who completed a monetary incentive delay (MID) task during functional magnetic resonance imaging. Results indicated that striatal activations in the nucleus accumbens (NAcc), caudate, and putamen were greatest for anticipating gains (ps < 0.001) but showed no group differences. In contrast to gains, the SUD+ exhibited lower NAcc (p = .01, d =0.53) and putamen (p = .04, d =0.40) activation to anticipating large losses than the comparison group. Within SUD+ , lower striatal responses during loss anticipations were associated with slower MID reaction times (NAcc: r = -0.43; putamen: r = -0.35) during loss trials. This is among the first imaging studies to examine underlying neural mechanisms associated with SUD within AIs. Attenuated loss processing provides initial evidence of a potential mechanism wherein blunted prediction of aversive consequences may be a defining feature of SUD that can inform future prevention and intervention targets.


Asunto(s)
Indio Americano o Nativo de Alaska , Anticipación Psicológica , Cuerpo Estriado , Factores Económicos , Trastornos Relacionados con Sustancias , Humanos , Indio Americano o Nativo de Alaska/psicología , Anticipación Psicológica/fisiología , Imagen por Resonancia Magnética , Motivación/fisiología , Núcleo Accumbens/diagnóstico por imagen , Núcleo Accumbens/fisiopatología , Recompensa , Trastornos Relacionados con Sustancias/diagnóstico por imagen , Trastornos Relacionados con Sustancias/economía , Trastornos Relacionados con Sustancias/etnología , Trastornos Relacionados con Sustancias/psicología , Población Urbana , Factores de Riesgo , Cuerpo Estriado/diagnóstico por imagen , Cuerpo Estriado/fisiopatología , Renta
15.
Cogn Affect Behav Neurosci ; 23(1): 162-170, 2023 02.
Artículo en Inglés | MEDLINE | ID: mdl-36289180

RESUMEN

Research has documented neurophysiological indicators of anticipation (Stimulus Preceding Negativity [SPN]) and perception (Late Positive Potential [LPP]) of threat, yet little is known as to how self-focused attention manipulations influence emotion processing within the context of cued picture viewing. With self-referent attention moderating attention to external stimuli, it is necessary to document how self-focused attention impacts attention and the ability to emotionally process external threat. The goal of the present study was to evaluate the impact of self-focused attention on the anticipation and perceptual processing of unpleasant pictures within a cued-picture viewing paradigm among 33 participants. Overall, the results suggest that the self-focused attention manipulations disrupted anticipation but not processing of pictures, as indexed by the SPN and LPP respectively. Self-focused attention appears to disrupt the preparatory attention for upcoming unpleasant stimuli, potentially through loading cognitive resources or activation of associative defensive responding. Collectively, these findings demonstrate the impact of self-focused attention within the context of emotional picture processing and suggest further areas of investigation.


Asunto(s)
Electroencefalografía , Potenciales Evocados , Humanos , Potenciales Evocados/fisiología , Electroencefalografía/métodos , Estimulación Luminosa , Emociones/fisiología , Motivación
16.
Neuropsychopharmacology ; 48(2): 263-269, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36385331

RESUMEN

American Indian and Alaska Native (AIAN) populations have suffered a history of exploitation and abuse within the context of mental health research and related fields. This history is rooted in assimilation policies, historical trauma, and cultural loss, and is promulgated through discrimination and disregard for traditional culture and community knowledge. In recognition of this history, it is imperative for researchers to utilize culturally sensitive approaches that consider the context of tribal communities to better address mental health issues for AIAN individuals. The public availability of data from large-scale studies creates both opportunities and challenges when studying mental health within AIAN populations. This manuscript has two goals; first, showcase an example of problematic use of Adolescent Brain Cognitive Development (ABCD) StudySM data to promulgate stereotypes about AIAN individuals and, second, in partnership with collaborators from Cherokee Nation, we provide five recommendations for utilizing data from publicly available datasets to advance health research in AIAN populations. Specifically, we argue for the consideration of (1) the heterogeneity of the communities represented, (2) the importance of focusing on AIAN health and well-being, (3) engagement of relevant communities and AIAN community leaders, (4) consideration of historical and ongoing injustices, and (5) engagement with AIAN regulatory agencies or review boards. These recommendations are founded on principles from broader indigenous research efforts emphasizing community-engaged research and principles of Indigenous Data Sovereignty and Governance.


Asunto(s)
Nativos Alasqueños , Indígenas Norteamericanos , Humanos , Adolescente , Indígenas Norteamericanos/psicología , Indio Americano o Nativo de Alaska , Nativos Alasqueños/psicología , Cognición , Encéfalo
17.
Soc Cogn Affect Neurosci ; 18(1)2023 02 23.
Artículo en Inglés | MEDLINE | ID: mdl-35801628

RESUMEN

American Indians (AI) experience disproportionately high prevalence of suicide and substance use disorders (SUD). However, accounting for risk burden (e.g. historical trauma and discrimination), the likelihood of mental health disorders or SUD is similar or decreased compared with the broader population. Such findings have spurred psychological research examining the protective factors, but no studies have investigated its potential neural mechanisms. Inhibitory control is one of the potential neurobehavioral construct with demonstrated protective effects, but has not been examined in neuroimaging studies with AI populations specifically. We examined the incidence of suicidal thoughts and behaviors (STB) and SUD among AI (n = 76) and propensity matched (sex, age, income, IQ proxy and trauma exposure) non-Hispanic White (NHW) participants (n = 76). Among the AI sample, functional magnetic resonance imaging (fMRI) data recorded during the stop-signal task (SST) was examined in relation to STB and SUDs. AIs relative to NHW subjects displayed lower incidence of STB. AIs with no reported STBs showed greater activity in executive control regions during the SST compared with AI who endorsed STB. AI without SUD demonstrated lower activity relative to those individual reporting SUD. Results are consistent with a growing body of literature demonstrating the high level of risk burden driving disparate prevalence of mental health concerns in AI. Furthermore, differential activation during inhibitory control processing in AI individuals without STB may represent a neural mechanism of protective effects against mental health problems in AI. Future research is needed to elucidate sociocultural factors contributing protection against mental health outcomes in AIs and further delineate neural mechanisms with respect to specific concerns (e.g. SUD vs STB).


Asunto(s)
Indígenas Norteamericanos , Inhibición Psicológica , Salud Mental , Humanos , Indígenas Norteamericanos/psicología , Trastornos Relacionados con Sustancias , Ideación Suicida
18.
Artículo en Inglés | MEDLINE | ID: mdl-35952971

RESUMEN

BACKGROUND: Treatments for anxiety and related disorders target exaggerated escape/avoidance as a core feature, but current methods fail to improve escape/avoidance habits for many treatment-seeking individuals. To support developing tools that increase treatment efficacy by targeting mechanisms more directly, the current work examined potential distinctions in the neurophysiologies of escape and avoidance and tested how clinical anxiety affects these neurophysiologies. METHODS: Twenty-five treatment-seeking individuals with varied principal diagnoses (e.g., generalized anxiety disorder, posttraumatic stress disorder) and 20 non-treatment-seeking control subjects participated. In the study task, approximately 5.25-second cues predicted aversive images that could be avoided (blocked by a button press before image onset), escaped (ended by a button press after image onset), or not controlled. To examine neural processing and defensive response modulation, anticipatory event-related potentials were derived, and startle reflexes were probed throughout each cue. RESULTS: Multidimensional profiles were observed such that 1) anticipatory event-related potential enhancement was only reliable during avoidance preparation, and event-related potentials potentially reflected perceived/instrumental control; and 2) startle reflexes were inhibited during avoidance preparation, relatively enhanced during escape preparation, and further enhanced during uncontrollable anticipation, thus potentially reflecting fear-related activation. Treatment-seeking status, then, did not affect cortical processing, but it did moderate context-dependent fear (if individuals with severe depression were excluded) such that treatment-seeking individuals without depression showed exaggerated startle during escape, but not avoidance, preparation. CONCLUSIONS: Data suggest a specific effect of anxiety on fear system activation during preparation to escape aversion. This effect warrants further investigation as a precision target for interventions that directly modulate the specific underlying neural circuitry.


Asunto(s)
Ansiedad , Trastornos por Estrés Postraumático , Humanos , Trastornos de Ansiedad , Miedo/fisiología , Adaptación Psicológica
19.
Artículo en Inglés | MEDLINE | ID: mdl-35967880

RESUMEN

Objective: Repetitive negative thinking (RNT) is an important symptom in the development and maintenance of eating disorders (EDs). RNT Research on RNT's effect on cognition in EDs is scarce. This investigation focused on associations between RNT and cognition in individuals with EDs. Methods: Ruminative Response Scale (RRS) was used from Tulsa-1000 study (T-1000) data (eating disorders-ED, Major Depressive Disorder-MDD, and healthy subjects) who were propensity matched to examine associations with cognitive performance. RNT was examined across groups and we quantified the associations between scores for RNT, depression, executive function, and learning/memory from the T-1000 study. A linear regression analysis was conducted to determine predictors of disability. Results: RNT was similar in ED and MDD participants, and more intense than in controls. RNT was significantly correlated with verbal learning/memory in the control (r = 0.514, p = 0.006) and ED groups (r = -0.447, p = 0.020), but this relationship had opposite slopes in either group. Increased RNT was associated with decreased verbal learning/memory ability in ED participants while in controls, increased RNT was associated with increased ability. Comorbid depression in the ED group acted as a potential moderator of the above relationship between RNT and EF. Among ED patients, depressive symptom severity was the best predictor of disability. Discussion: The differential association of RNT with cognitive abilities in ED and MDD patients suggests depression is not a mediator of RNT-mediated cognitive dysfunction in EDs. This necessitates a better understanding of the mechanistic relationship between RNT and diverse types of cognitive functioning.

20.
Front Psychol ; 13: 926697, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35978795

RESUMEN

Objective: To further delineate risk and resilience factors contributing to trajectories of mental health symptoms experienced by college students through the pandemic. Participants: n = 183 college students (67.2% female). Methods: Linear mixed models examined time effects on depression and anxiety. Propensity-matched subgroups exhibiting "increased" versus "low and stable" depression symptoms from before to after the pandemic-onset were compared on pre-pandemic demographic and psychological factors and COVID-related experiences and coping strategies. Results: Students experienced worsening of mental health symptoms throughout the pandemic, particularly during Fall 2020 compared with Fall 2019 (Depression scale d = -0.43 [95% CI: -0.65 to -0.21]). The propensity-matched subgroup exhibiting relative resilience ("low and stable" symptoms) reported less alcohol use prior to the pandemic, greater use of active coping strategies, and less of an impact on their college progress. Conclusions: Results point to several potential targets of screening and intervention to decrease residual impacts of the pandemic.

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