Publications by authors named "Ricardo Wilhelm"

A resilience-based approach in American Indian (AI) communities focuses on inherent sociocultural assets that may act as protective resilience buffers linked to mitigated mental health risks (e.g., deep-rooted spiritual, robust social support networks).

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  • The study looked at how people with Major Depressive Disorder (MDD) who think negatively a lot (called repetitive negative thinking or RNT) process mistakes in their brains.
  • They used a special method to measure brain activity while people tried to stop themselves from making errors.
  • Results showed that those with high RNT and no anxiety didn't respond well to mistakes, while those with anxiety managed to process errors better, suggesting that anxiety might help with recognizing mistakes.
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  • Physical activity has positive effects on both physical and mental health, and this study examines how it relates to resting frontal alpha asymmetry (FAA), which indicates brain activity associated with emotions and motivations.
  • The research involved 70 college students who reported their physical and sedentary activities, finding that women showed a positive relationship between physical activity and FAA, while men exhibited a negative relationship.
  • Additionally, increased sedentary behavior was linked to higher FAA across all participants, suggesting that both physical activity and sitting time can influence emotional and motivational brain mechanisms differently for each gender.
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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).

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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.

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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.

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Past work on motivation has primarily studied dichotomous distinctions of motivation (e.g., extrinsic or intrinsic).

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Debate exists as to the effects of anxiety in performance-based studies. However, no studies have examined the influence of motivation both in preparation of a motor movement and during movement performance. The present study measured beta activation in preparation for and during execution of the effort expenditure for rewards task (EEfRT), a button-pressing task consisting of easy and hard trials.

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Abnormalities of the inferior vena cava are rare. Its embryological development occurs between the sixth and eighth week of gestation and depends on the persistence or regression of three pairs of veins: the posterior cardinal veins, the subcardinal veins and the supracardinal veins. The type of congenital alteration depends on the moment that embryogenesis is altered.

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Previous research has linked neural correlates with motivational traits and measures of impulsivity. However, few previous studies have investigated whether individual differences in motivation and impulsivity moderate the relationship between these disparate neural activity patterns. In a sample of 118 young adults, we used Electroencephalography (EEG) to examine whether behavioral activation and inhibition systems (BIS/BAS) and impulsivity facets (negative urgency, lack of perseverance), moderate the relationship between beta power and resting frontal alpha asymmetry.

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Past research has demonstrated that regular physical activity provides a myriad of physical, mental, and emotional benefits. The decision of whether to partake in physical activity (PA) or remain sedentary appears to be partially influenced by motivational and emotional systems. Research suggests left frontal alpha asymmetry is a neural marker of approach motivation.

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Some models of motivation distinguish between intrinsic and extrinsic motivation. While past work has examined the neural and cognitive correlates of extrinsic motivation, research on intrinsic motivation has relied primarily on behavioral measures of performance and learning. In particular, no past work has examined the neural and cognitive correlates of social performance expectancy, which is linked to intrinsic motivation.

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