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1.
BMC Psychiatry ; 24(1): 362, 2024 May 14.
Artigo em Inglês | MEDLINE | ID: mdl-38745267

RESUMO

BACKGROUND: Obsessive-compulsive disorder (OCD) is characterized by persistent, unwanted thoughts and repetitive actions. Such repetitive thoughts and/or behaviors may be reinforced either by reducing anxiety or by avoiding a potential threat or harm, and thus may be rewarding to the individual. The possible involvement of the reward system in the symptomatology of OCD is supported by studies showing altered reward processing in reward-related regions, such as the ventral striatum (VS) and the orbitofrontal cortex (OFC), in adults with OCD. However, it is not clear whether this also applies to adolescents with OCD. METHODS: Using functional magnetic resonance imaging, two sessions were conducted focusing on the anticipation and receipt of monetary reward (1) or loss (2), each contrasted to a verbal (control) condition. In each session, adolescents with OCD (n1=31/n2=26) were compared with typically developing (TD) controls (n1=33/ n2=31), all aged 10-19 years, during the anticipation and feedback phase of an adapted Monetary Incentive Delay task. RESULTS: Data revealed a hyperactivation of the VS, but not the OFC, when anticipating both monetary reward and loss in the OCD compared to the TD group. CONCLUSIONS: These findings suggest that aberrant neural reward and loss processing in OCD is associated with greater motivation to gain or maintain a reward but not with the actual receipt. The greater degree of reward 'wanting' may contribute to adolescents with OCD repeating certain actions more and more frequently, which then become habits (i.e., OCD symptomatology).


Assuntos
Antecipação Psicológica , Imageamento por Ressonância Magnética , Transtorno Obsessivo-Compulsivo , Recompensa , Estriado Ventral , Humanos , Adolescente , Transtorno Obsessivo-Compulsivo/fisiopatologia , Transtorno Obsessivo-Compulsivo/psicologia , Transtorno Obsessivo-Compulsivo/diagnóstico por imagem , Masculino , Feminino , Antecipação Psicológica/fisiologia , Estriado Ventral/fisiopatologia , Estriado Ventral/diagnóstico por imagem , Adulto Jovem , Criança , Córtex Pré-Frontal/fisiopatologia , Córtex Pré-Frontal/diagnóstico por imagem , Motivação/fisiologia
2.
Sci Rep ; 14(1): 10913, 2024 05 13.
Artigo em Inglês | MEDLINE | ID: mdl-38740937

RESUMO

One of the less recognized effects of anxiety lies in perception alterations caused by how one weighs both sensory evidence and contextual cues. Here, we investigated how anxiety affects our ability to use social cues to anticipate the others' actions. We adapted a paradigm to assess expectations in social scenarios, whereby participants were asked to identify the presence of agents therein, while supported by contextual cues from another agent. Participants (N = 66) underwent this task under safe and threat-of-shock conditions. We extracted both criterion and sensitivity measures as well as gaze data. Our analysis showed that whilst the type of action had the expected effect, threat-of-shock had no effect over criterion and sensitivity. Although showing similar dwell times, gaze exploration of the contextual cue was associated with shorter fixation durations whilst participants were under threat. Our findings suggest that anxiety does not appear to influence the use of expectations in social scenarios.


Assuntos
Antecipação Psicológica , Ansiedade , Humanos , Masculino , Feminino , Adulto , Ansiedade/psicologia , Adulto Jovem , Sinais (Psicologia) , Percepção Visual/fisiologia
3.
Behav Brain Res ; 466: 114979, 2024 May 28.
Artigo em Inglês | MEDLINE | ID: mdl-38582409

RESUMO

OBJECTIVE: Reward anticipation is important for future decision-making, possibly due to re-evaluation of prior decisions. However, the exact relationship between reward anticipation and prior effort-expenditure decision-making, and its neural substrates are unknown. METHOD: Thirty-three healthy participants underwent fMRI scanning while performing the Effort-based Pleasure Experience Task (E-pet). Participants were required to make effort-expenditure decisions and anticipate the reward. RESULTS: We found that stronger anticipatory activation at the posterior cingulate cortex was correlated with slower reaction time while making decisions with a high-probability of reward. Moreover, the substantia nigra was significantly activated in the prior decision-making phase, and involved in reward-anticipation in view of its strengthened functional connectivity with the mammillary body and the putamen in trial conditions with a high probability of reward. CONCLUSIONS: These findings support the role of reward anticipation in re-evaluating decisions based on the brain-behaviour correlation. Moreover, the study revealed the neural interaction between reward anticipation and decision-making.


Assuntos
Antecipação Psicológica , Tomada de Decisões , Imageamento por Ressonância Magnética , Tempo de Reação , Recompensa , Humanos , Masculino , Tomada de Decisões/fisiologia , Antecipação Psicológica/fisiologia , Feminino , Adulto Jovem , Adulto , Tempo de Reação/fisiologia , Giro do Cíngulo/fisiologia , Giro do Cíngulo/diagnóstico por imagem , Mapeamento Encefálico , Encéfalo/fisiologia , Encéfalo/diagnóstico por imagem , Substância Negra/fisiologia , Substância Negra/diagnóstico por imagem
4.
Psychiatry Res ; 335: 115877, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38555826

RESUMO

Understanding the underlying mechanisms that link psychopathology and physical comorbidities in schizophrenia is crucial since decreased physical fitness and overweight pose major risk factors for cardio-vascular diseases and decrease the patients' life expectancies. We hypothesize that altered reward anticipation plays an important role in this. We implemented the Monetary Incentive Delay task in a MR scanner and a fitness test battery to compare schizophrenia patients (SZ, n = 43) with sex- and age-matched healthy controls (HC, n = 36) as to reward processing and their physical fitness. We found differences in reward anticipation between SZs and HCs, whereby increased activity in HCs positively correlated with overall physical condition and negatively correlated with psychopathology. On the other handy, SZs revealed stronger activity in the posterior cingulate cortex and in cerebellar regions during reward anticipation, which could be linked to decreased overall physical fitness. These findings demonstrate that a dysregulated reward system is not only responsible for the symptomatology of schizophrenia, but might also be involved in physical comorbidities which could pave the way for future lifestyle therapy interventions.


Assuntos
Mapeamento Encefálico , Esquizofrenia , Humanos , Esquizofrenia/diagnóstico por imagem , Esquizofrenia/patologia , Encéfalo/diagnóstico por imagem , Encéfalo/patologia , Motivação , Recompensa , Imageamento por Ressonância Magnética , Antecipação Psicológica , Aptidão Física
5.
J Neurosci ; 44(17)2024 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-38453467

RESUMO

Pain perception arises from the integration of prior expectations with sensory information. Although recent work has demonstrated that treatment expectancy effects (e.g., placebo hypoalgesia) can be explained by a Bayesian integration framework incorporating the precision level of expectations and sensory inputs, the key factor modulating this integration in stimulus expectancy-induced pain modulation remains unclear. In a stimulus expectancy paradigm combining emotion regulation in healthy male and female adults, we found that participants' voluntary reduction in anticipatory anxiety and pleasantness monotonically reduced the magnitude of pain modulation by negative and positive expectations, respectively, indicating a role of emotion. For both types of expectations, Bayesian model comparisons confirmed that an integration model using the respective emotion of expectations and sensory inputs explained stimulus expectancy effects on pain better than using their respective precision. For negative expectations, the role of anxiety is further supported by our fMRI findings that (1) functional coupling within anxiety-processing brain regions (amygdala and anterior cingulate) reflected the integration of expectations with sensory inputs and (2) anxiety appeared to impair the updating of expectations via suppressed prediction error signals in the anterior cingulate, thus perpetuating negative expectancy effects. Regarding positive expectations, their integration with sensory inputs relied on the functional coupling within brain structures processing positive emotion and inhibiting threat responding (medial orbitofrontal cortex and hippocampus). In summary, different from treatment expectancy, pain modulation by stimulus expectancy emanates from emotion-modulated integration of beliefs with sensory evidence and inadequate belief updating.


Assuntos
Antecipação Psicológica , Ansiedade , Imageamento por Ressonância Magnética , Humanos , Masculino , Feminino , Ansiedade/psicologia , Ansiedade/fisiopatologia , Adulto , Antecipação Psicológica/fisiologia , Adulto Jovem , Percepção da Dor/fisiologia , Dor/psicologia , Dor/fisiopatologia , Teorema de Bayes , Emoções/fisiologia , Encéfalo/diagnóstico por imagem , Encéfalo/fisiopatologia , Encéfalo/fisiologia , Prazer/fisiologia , Mapeamento Encefálico
6.
Neuroscience ; 546: 33-40, 2024 May 14.
Artigo em Inglês | MEDLINE | ID: mdl-38513759

RESUMO

An exceptional ability to accurately anticipate an opponent's action is paramount for competitive athletes and highlights their experiential mastery. Despite conventional associations of action observation with specific brain regions, neuroimaging discrepancies persist. To explore the brain regions and neural mechanisms undergirding action anticipation, we compared distinct brain activation patterns involved in table tennis serve anticipation of expert table tennis athletes vs. non-experts by using both univariate analysis and multivoxel pattern analysis (MVPA). We collected functional magnetic resonance imaging data from 29 table tennis experts and 34 non-experts as they pressed a button to predict the trajectory of a ball in a table tennis serve video truncated at the moment of racket-ball contact vs. pressing any button while viewing a static image of the first video frame. MVPA was applied to assess whether it could accurately differentiate experts from non-experts. MVPA results indicated moderate accuracy (90.48%) for differentiating experts from non-experts. Brain regions contributing most to the differentiation included the left cerebellum, the vermis, the right middle temporal pole, the inferior parietal cortex, the bilateral paracentral lobule, and the left supplementary motor area. The findings suggest that brain regions associated with cognitive conflict monitoring and motor cognition contribute to the action anticipation ability of expert table tennis players.


Assuntos
Antecipação Psicológica , Encéfalo , Imageamento por Ressonância Magnética , Humanos , Imageamento por Ressonância Magnética/métodos , Masculino , Adulto Jovem , Feminino , Encéfalo/fisiologia , Encéfalo/diagnóstico por imagem , Adulto , Antecipação Psicológica/fisiologia , Mapeamento Encefálico/métodos , Atletas , Tênis/fisiologia , Desempenho Psicomotor/fisiologia , Esportes com Raquete/fisiologia
7.
Exp Brain Res ; 242(5): 1215-1223, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38526741

RESUMO

Working memory (WM) can influence selective attention. However, the effect of WM load on postural standing tasks has been poorly understood, even though these tasks require attentional resources. The purpose of this study was to examine whether WM load would impact anticipatory postural adjustments (APAs) during step initiation. Sixteen healthy young adults performed stepping tasks alone or concurrently with a WM task in a dual-task design. The stepping tasks involved volitional stepping movements in response to visual stimuli and comprised of simple and choice reaction time tasks and the Flanker task which consisted of congruent and incongruent (INC) conditions. In the dual-task condition, subjects were required to memorize either one or six digits before each stepping trial. Incorrect weight transfer prior to foot-lift, termed APA errors, reaction time (RT), and foot-lift time were measured from the vertical force data. The results showed that APA error rate was significantly higher when memorizing six-digit than one-digit numerals in the INC condition. In addition, RT and foot-lift time were significantly longer in the INC condition compared to the other stepping conditions, while there was no significant effect of WM load on RT or foot-lift time. These findings suggest that high WM load reduces the cognitive resources needed for selective attention and decision making during step initiation.


Assuntos
Antecipação Psicológica , Memória de Curto Prazo , Equilíbrio Postural , Desempenho Psicomotor , Tempo de Reação , Humanos , Masculino , Adulto Jovem , Feminino , Adulto , Tempo de Reação/fisiologia , Equilíbrio Postural/fisiologia , Memória de Curto Prazo/fisiologia , Desempenho Psicomotor/fisiologia , Antecipação Psicológica/fisiologia , Atenção/fisiologia , Postura/fisiologia
8.
Artigo em Inglês | MEDLINE | ID: mdl-38387698

RESUMO

Clinical trials of psychedelic compounds like psilocybin, lysergic acid diethylamide (LSD), and N,N-dimethyltrptamine (DMT) have forced a reconsideration of how nondrug factors, such as participant expectations, are measured and controlled in mental health research. As doses of these profoundly psychoactive substances increase, so does the difficulty in concealing the treatment condition in the classic double-blind, placebo-controlled trial design. As widespread public enthusiasm for the promise of psychedelic therapy grows, so do questions regarding whether and how much trial results are biased by positive expectancy. First, we review the key concepts related to expectancy and its measurement. Then, we review expectancy effects that have been reported in both micro- and macrodose psychedelic trials from the modern era. Finally, we consider expectancy as a discrete physiological process that can be independent of, or even interact with, the drug effect. Expectancy effects can be harnessed to improve treatment outcomes and can also be actively managed in controlled studies to enhance the rigor and generalizability of future psychedelic trials.


Assuntos
Alucinógenos , Humanos , Alucinógenos/farmacologia , Ensaios Clínicos como Assunto , Antecipação Psicológica/efeitos dos fármacos , Antecipação Psicológica/fisiologia , Efeito Placebo
9.
Cortex ; 173: 161-174, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38417389

RESUMO

Reward motivation is essential in shaping human behavior and cognition. Both reward motivation and reward brain circuits are altered in chronic pain conditions, including fibromyalgia. In this study of fibromyalgia patients, we used a data-driven independent component analysis (ICA) approach to investigate how brain networks contribute to altered reward processing. From females with fibromyalgia (N = 24) and female healthy controls (N = 24), we acquired fMRI data while participants performed a monetary incentive delay (MID) reward task. After analyzing the task-based fMRI data using ICA to identify networks, we analyzed 3 networks of interest: motor network (left), value-driven attention network, and basal ganglia network. Then, we evaluated correlation coefficients between each network timecourse versus a task-based timecourse which modeled gain anticipation. Compared to controls, the fibromyalgia cohort demonstrated significantly stronger correlation between the left motor network timecourse and the gain anticipation timecourse, indicating the left motor network was more engaged with gain anticipation in fibromyalgia. In an exploratory analysis, we compared motor network engagement during early versus late phases of gain anticipation. Across cohorts, greater motor network engagement (i.e., stronger correlation between network and gain anticipation) occurred during the late timepoint, which reflected enhanced motor preparation immediately prior to response. Consistent with the main results, patients exhibited greater engagement of the motor network during both early and late phases compared with healthy controls. Visual-attention and basal ganglia networks revealed similar engagement in the task across groups. As indicated by post-hoc analyses, motor network engagement was positively related to anxiety and negatively related to reward responsiveness. In summary, we identified enhanced reward-task related engagement of the motor network in fibromyalgia using a novel data-driven ICA approach. Enhanced motor network engagement in fibromyalgia may relate to impaired reward motivation, heightened anxiety, and possibly to altered motor processing, such as restricted movement or dysregulated motor planning.


Assuntos
Fibromialgia , Humanos , Feminino , Fibromialgia/diagnóstico por imagem , Mapeamento Encefálico , Encéfalo/diagnóstico por imagem , Encéfalo/fisiologia , Motivação , Recompensa , Imageamento por Ressonância Magnética , Antecipação Psicológica/fisiologia
10.
J Exp Psychol Hum Percept Perform ; 50(3): 249-262, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38421773

RESUMO

In timing research, repeated stimuli have been shown to have a shortening effect on time perception compared to novel stimuli. This finding had been attributed to repeated stimuli being more expected and, thus, less arousing and/or attended, or eliciting less neuronal activation due to repetition suppression, which results in temporal underestimation. However, more recent studies in the visual domain that disentangled effects of repetition and expectation suggest a more nuanced interpretation. In these studies, repetition led to temporal contraction while expectation caused subjective dilation of time. It was argued that expectations increase the perceptual strength of the stimulus, which leads to temporal overestimation, while repetitions reduce perceptual strength, which then leads to temporal underestimation. In the present study, we sought to further elaborate on these findings using auditory stimuli. In Experiment 1, we used an implicit method to induce expectation and manipulated the probability of stimulus repetition block-wise in a two-stimulus paradigm with auditory tones. Our findings were in line with the recent findings. When repetitions were less frequent, that is, less expected, we found clear evidence for perceived temporal contraction of repetitions. In contrast, when repetitions were more expected, the shortening effect of stimulus repetition on subjective duration disappeared. In Experiment 2, participants explicitly generated expectations about an upcoming tone in a temporal bisection paradigm. In trials, where expectations were fulfilled, presentation durations were perceived longer compared to trials with unfulfilled expectations. Our findings suggest that factors that increase the perceptual strength of a stimulus contribute to subjective temporal dilation. (PsycInfo Database Record (c) 2024 APA, all rights reserved).


Assuntos
Motivação , Percepção do Tempo , Humanos , Percepção do Tempo/fisiologia , Dilatação , Probabilidade , Antecipação Psicológica/fisiologia
11.
Nat Commun ; 15(1): 1544, 2024 Feb 20.
Artigo em Inglês | MEDLINE | ID: mdl-38378947

RESUMO

Uncertainty about potential future threats and the associated anxious anticipation represents a key feature of anxiety. However, the neural systems that underlie the subjective experience of threat anticipation under uncertainty remain unclear. Combining an uncertainty-variation threat anticipation paradigm that allows precise modulation of the level of momentary anxious arousal during functional magnetic resonance imaging (fMRI) with multivariate predictive modeling, we train a brain model that accurately predicts subjective anxious arousal intensity during anticipation and test it across 9 samples (total n = 572, both gender). Using publicly available datasets, we demonstrate that the whole-brain signature specifically predicts anxious anticipation and is not sensitive in predicting pain, general anticipation or unspecific emotional and autonomic arousal. The signature is also functionally and spatially distinguishable from representations of subjective fear or negative affect. We develop a sensitive, generalizable, and specific neuroimaging marker for the subjective experience of uncertain threat anticipation that can facilitate model development.


Assuntos
Ansiedade , Emoções , Incerteza , Medo , Encéfalo/diagnóstico por imagem , Mapeamento Encefálico , Imageamento por Ressonância Magnética , Antecipação Psicológica
12.
Psychophysiology ; 61(6): e14544, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38351668

RESUMO

Predictive coding framework posits that our brain continuously monitors changes in the environment and updates its predictive models, minimizing prediction errors to efficiently adapt to environmental demands. However, the underlying neurophysiological mechanisms of these predictive phenomena remain unclear. The present study aimed to explore the systemic neurophysiological correlates of predictive coding processes during passive and active auditory processing. Electroencephalography (EEG), functional near-infrared spectroscopy (fNIRS), and autonomic nervous system (ANS) measures were analyzed using an auditory pattern-based novelty oddball paradigm. A sample of 32 healthy subjects was recruited. The results showed shared slow evoked potentials between passive and active conditions that could be interpreted as automatic predictive processes of anticipation and updating, independent of conscious attentional effort. A dissociated topography of the cortical hemodynamic activity and distinctive evoked potentials upon auditory pattern violation were also found between both conditions, whereas only conscious perception leading to imperative responses was accompanied by phasic ANS responses. These results suggest a systemic-level hierarchical reallocation of predictive coding neural resources as a function of contextual demands in the face of sensory stimulation. Principal component analysis permitted to associate the variability of some of the recorded signals.


Assuntos
Percepção Auditiva , Eletroencefalografia , Potenciais Evocados Auditivos , Espectroscopia de Luz Próxima ao Infravermelho , Humanos , Masculino , Feminino , Adulto , Adulto Jovem , Percepção Auditiva/fisiologia , Potenciais Evocados Auditivos/fisiologia , Sistema Nervoso Autônomo/fisiologia , Córtex Cerebral/fisiologia , Antecipação Psicológica/fisiologia , Atenção/fisiologia
13.
Psychophysiology ; 61(6): e14546, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38406863

RESUMO

The current registered report focused on the temporal dynamics of the relationship between expectancy and attention toward threat, to better understand the mechanisms underlying the prioritization of threat detection over expectancy. In the current event-related potentials experiment, a-priori expectancy was manipulated, and attention bias was measured, using a well-validated paradigm. A visual search array was presented, with one of two targets: spiders (threatening) or birds (neutral). A verbal cue stating the likelihood of encountering a target preceded the array, creating congruent and incongruent trials. Following cue presentation, preparatory processes were examined using the contingent negative variation (CNV) component. Following target presentation, two components were measured: early posterior negativity (EPN) and late positive potential (LPP), reflecting early and late stages of natural selective attention toward emotional stimuli, respectively. Behaviorally, spiders were found faster than birds, and congruency effects emerged for both targets. For the CNV, a non-significant trend of more negative amplitudes following spider cues emerged. As expected, EPN and LPP amplitudes were larger for spider targets compared to bird targets. Data-driven, exploratory, topographical analyses revealed different patterns of activation for bird cues compared to spider cues. Furthermore, 400-500 ms post-target, a congruency effect was revealed only for bird targets. Together, these results demonstrate that while expectancy for spider appearance is evident in differential neural preparation, the actual appearance of spider target overrides this expectancy effect and only in later stages of processing does the cueing effect come again into play.


Assuntos
Antecipação Psicológica , Viés de Atenção , Eletroencefalografia , Potenciais Evocados , Aranhas , Humanos , Feminino , Animais , Aranhas/fisiologia , Potenciais Evocados/fisiologia , Masculino , Adulto Jovem , Adulto , Viés de Atenção/fisiologia , Antecipação Psicológica/fisiologia , Sinais (Psicologia) , Atenção/fisiologia , Aves/fisiologia , Medo/fisiologia
14.
Sci Rep ; 14(1): 3383, 2024 02 09.
Artigo em Inglês | MEDLINE | ID: mdl-38337009

RESUMO

Anticipation of pain engenders anxiety and fear, potentially shaping pain perception and governing bodily responses such as peripheral vasomotion through the sympathetic nervous system (SNS). Sympathetic innervation of vascular tone during pain perception has been quantified using a peripheral arterial stiffness index; however, its innervation role during pain anticipation remains unclear. This paper reports on a neuroimaging-based study designed to investigate the responsivity and attribution of the index at different levels of anticipatory anxiety and pain perception. The index was measured in a functional magnetic resonance imaging experiment that randomly combined three visual anticipation cues and painful stimuli of two intensities. The peripheral and cerebral responses to pain anticipation and perception were quantified to corroborate bodily responsivity, and their temporal correlation was also assessed to identify the response attribution of the index. Contrasting with the high responsivity across levels of pain sensation, a low responsivity of the index across levels of anticipatory anxiety revealed its specificity across pain experiences. Discrepancies between the effects of perception and anticipation were validated across regions and levels of brain activity, providing a brain basis for peripheral response specificity. The index was also characterized by a 1-s lag in both anticipation and perception of pain, implying top-down innervation of the periphery. Our findings suggest that the SNS responds to pain in an emotion-specific and sensation-unbiased manner, thus enabling an early assessment of individual pain perception using this index. This study integrates peripheral and cerebral hemodynamic responses toward a comprehensive understanding of bodily responses to pain.


Assuntos
Encéfalo , Dor , Humanos , Encéfalo/diagnóstico por imagem , Percepção da Dor/fisiologia , Medo/fisiologia , Neuroimagem , Imageamento por Ressonância Magnética , Antecipação Psicológica/fisiologia
15.
Psychol Med ; 54(7): 1441-1451, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38197294

RESUMO

BACKGROUND: Schizophrenia is associated with hypoactivation of reward sensitive brain areas during reward anticipation. However, it is unclear whether these neural functions are similarly impaired in other disorders with psychotic symptomatology or individuals with genetic liability for psychosis. If abnormalities in reward sensitive brain areas are shared across individuals with psychotic psychopathology and people with heightened genetic liability for psychosis, there may be a common neural basis for symptoms of diminished pleasure and motivation. METHODS: We compared performance and neural activity in 123 people with a history of psychosis (PwP), 81 of their first-degree biological relatives, and 49 controls during a modified Monetary Incentive Delay task during fMRI. RESULTS: PwP exhibited hypoactivation of the striatum and anterior insula (AI) during cueing of potential future rewards with each diagnostic group showing hypoactivations during reward anticipation compared to controls. Despite normative task performance, relatives demonstrated caudate activation intermediate between controls and PwP, nucleus accumbens activation more similar to PwP than controls, but putamen activation on par with controls. Across diagnostic groups of PwP there was less functional connectivity between bilateral caudate and several regions of the salience network (medial frontal gyrus, anterior cingulate, AI) during reward anticipation. CONCLUSIONS: Findings implicate less activation and connectivity in reward processing brain regions across a spectrum of disorders involving psychotic psychopathology. Specifically, aberrations in striatal and insular activity during reward anticipation seen in schizophrenia are partially shared with other forms of psychotic psychopathology and associated with genetic liability for psychosis.


Assuntos
Transtornos Psicóticos , Esquizofrenia , Adulto , Humanos , Recompensa , Encéfalo/diagnóstico por imagem , Transtornos Psicóticos/diagnóstico por imagem , Motivação , Esquizofrenia/diagnóstico por imagem , Imageamento por Ressonância Magnética , Antecipação Psicológica/fisiologia
16.
Cogn Affect Behav Neurosci ; 24(3): 402-420, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38291309

RESUMO

We investigated the simultaneous influence of expectation and experience on metacontrol, which we define as the instantiation of context-specific control states. These states could entail heightened control states in preparation for frequent task switching or lowered control states for task repetition. Specifically, we examined whether "expectations" regarding future control demands prompt proactive metacontrol, while "experiences" with items associated with specific control demands facilitate reactive metacontrol. In Experiment 1, we utilized EEG with a high temporal resolution to differentiate between brain activities associated with proactive and reactive metacontrol. We successfully observed cue-locked and image-locked ERP patterns associated with proactive and reactive metacontrol, respectively, supporting concurrent instantiation of two metacontrol modes. In Experiment 2, we focused on individual differences to investigate the modulatory role of working memory capacity (WMC) in the concurrent instantiation of two metacontrol modes. Our findings revealed that individuals with higher WMC exhibited enhanced proactive metacontrol, indicated by smaller response time variability (RTV). Additionally, individuals with higher WMC showed a lower tendency to rely on reactive metacontrol, indicated by a smaller item-specific switch probability (ISSP) effect. In conclusion, our results suggest that proactive and reactive metacontrol can coexist, but their interplay is influenced by individuals' WMC. Higher WMC promotes the use of proactive metacontrol while attenuating reliance on reactive metacontrol. This study provides insights into the interplay between proactive and reactive metacontrol and highlights the impact of WMC on their concurrent instantiation.


Assuntos
Eletroencefalografia , Potenciais Evocados , Memória de Curto Prazo , Humanos , Memória de Curto Prazo/fisiologia , Masculino , Feminino , Adulto Jovem , Eletroencefalografia/métodos , Adulto , Potenciais Evocados/fisiologia , Encéfalo/fisiologia , Tempo de Reação/fisiologia , Função Executiva/fisiologia , Adolescente , Individualidade , Antecipação Psicológica/fisiologia
17.
Biol Psychiatry ; 95(3): 256-265, 2024 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-37567334

RESUMO

BACKGROUND: Patients with stimulant use disorder experience high rates of relapse. While neurobehavioral mechanisms involved in initiating drug use have been studied extensively, less research has focused on relapse. METHODS: To assess motivational processes involved in relapse and diagnosis, we acquired functional magnetic resonance imaging responses to nondrug (monetary) gains and losses in detoxified patients with stimulant use disorder (n = 68) and community control participants (n = 42). In a prospective multimodal design, we combined imaging of brain function, brain structure, and behavior to longitudinally track subsequent risk for relapse. RESULTS: At the 6-month follow-up assessment, 27 patients remained abstinent, but 33 had relapsed. Patients with blunted anterior insula (AIns) activity during loss anticipation were more likely to relapse, an association that remained robust after controlling for potential confounds (i.e., craving, negative mood, years of use, age, and gender). Lower AIns activity during loss anticipation was associated with lower self-reported negative arousal to loss cues and slower behavioral responses to avoid losses, which also independently predicted relapse. Furthermore, AIns activity during loss anticipation was associated with the structural coherence of a tract connecting the AIns and the nucleus accumbens, as was functional connectivity between the AIns and nucleus accumbens during loss processing. However, these neurobehavioral responses did not differ between patients and control participants. CONCLUSIONS: Taken together, the results of the current study show that neurobehavioral markers predicted relapse above and beyond conventional self-report measures, with a cross-validated accuracy of 72.7%. These findings offer convergent multimodal evidence that implicates blunted avoidance motivation in relapse to stimulant use and may therefore guide interventions targeting individuals who are most vulnerable to relapse.


Assuntos
Encéfalo , Transtornos Relacionados ao Uso de Substâncias , Humanos , Estudos Prospectivos , Encéfalo/diagnóstico por imagem , Motivação , Doença Crônica , Imageamento por Ressonância Magnética , Recidiva , Antecipação Psicológica/fisiologia , Recompensa
18.
Psychopharmacology (Berl) ; 241(1): 181-193, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38141075

RESUMO

INTRODUCTION: Stimulant drugs are thought to alter processing of rewarding stimuli. However, the mechanisms by which they do this are not fully understood. METHOD: In this study we used EEG to assess effects of single doses of methamphetamine (MA) on neural responses during anticipation and receipt of reward in healthy volunteers. Healthy young men and women (N = 28) completed three sessions in which they received placebo, a low MA dose (10 mg) or a higher MA dose (20 mg) under double blind conditions. Subjective and cardiovascular measures were obtained, and EEG was used to assess brain activity during an electrophysiological version of the Monetary Incentive Delay (eMID) task. RESULTS: EEG measures showed expected patterns during anticipation and receipt of reward, and MA produced its expected effects on mood and cardiovascular function. However, MA did not affect EEG responses during either anticipation or receipt of rewards. CONCLUSIONS: These findings suggest that the effects of MA on EEG signals of reward processing are subtle, and not related to the drug's effects on subjective feelings of well-being. The findings contribute to our understanding of the neural effects of MA during behaviors related to reward.


Assuntos
Metanfetamina , Masculino , Adulto , Humanos , Feminino , Metanfetamina/farmacologia , Emoções , Recompensa , Motivação , Encéfalo , Imageamento por Ressonância Magnética , Antecipação Psicológica
19.
Neuropsychologia ; 191: 108718, 2023 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-37939872

RESUMO

During biological motion perception, individuals with perceptual experience learn to use more global processing, simultaneously extracting information from multiple body segments. Less experienced observers may use more local processing of individual body segments. The parietal lobe (e.g., alpha and beta power) has been shown to be critical to global and local static stimulus perception. Therefore, in this paper, we examined how skill impacts motion processing by assessing behavioral and neural responses to degrading global or local motion information for soccer penalty kicks. Skilled (N = 21) and less skilled (N = 19) soccer players anticipated temporally occluded videos of penalty kicks under normal, blurred (degraded local information), or spatially occluded (hips-only; degraded global information) viewing conditions. EEG was used to measure parietal alpha and beta power. Skilled players outperformed less skilled players, albeit both skill groups were less accurate in the blurred and hips-only conditions. Skilled performers showed significant decreases in bilateral parietal beta power in the hips-only condition, suggesting a greater reliance on global motion information under normal viewing conditions. Additionally, the hips-only condition elicited significantly greater beta relative to alpha power (beta - alpha), lower beta power, and lower alpha power than the control condition for both skill groups, suggesting spatial occlusion elicited a shift towards more local processing. Our novel findings demonstrate that skill and experience impact how motion is processed.


Assuntos
Percepção de Movimento , Futebol , Humanos , Percepção de Movimento/fisiologia , Aprendizagem , Movimento (Física) , Antecipação Psicológica/fisiologia
20.
Psychol Sport Exerc ; 65: 102335, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-37665843

RESUMO

Stimulus identification and action outcome understanding for a rapid and accurate response selection, play a fundamental role in racquet sports. Here, we investigated the neurodynamics of visual anticipation in tennis manipulating the postural and kinematic information associated with the body of opponents by means of a spatial occlusion protocol. Event Related Potentials (ERPs) were evaluated in two groups of professional tennis players (N = 37) with different levels of expertise, while they observed pictures of opponents and predicted the landing position as fast and accurately as possible. The observed action was manipulated by deleting different body districts of the opponent (legs, ball, racket and arm, trunk). Full body image (no occlusion) was used as control condition. The worst accuracy and the slowest response time were observed in the occlusion of trunk and ball. The former was associated with a reduced amplitude of the ERP components likely linked to body processing (the N1 in the right hemisphere) and visual-motor integration awareness (the pP1), as well as with an increase of the late frontal negativity (the pN2), possibly reflecting an effort by the insula to recover and/or complete the most correct sensory-motor representation. In both occlusions, a decrease in the pP2 may reflect an impairment of decisional processes upon action execution following sensory evidence accumulation. Enhanced amplitude of the P3 and the pN2 components were found in more experienced players, suggesting a greater allocation of resources in the process connecting sensory encoding and response execution, and sensory-motor representation.


Assuntos
Antecipação Psicológica , Atletas , Encéfalo , Navegação Espacial , Tênis , Percepção Visual , Tênis/fisiologia , Tênis/psicologia , Atletas/psicologia , Encéfalo/fisiologia , Humanos , Masculino , Adolescente , Adulto Jovem , Adulto , Potenciais Evocados
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