The Attention-Deficit/Hyperactivity Disorder-Associated DRD4 7R Allele Predicts Household Economic Status but Not Nutritional Status in Northern Kenyan Rendille Children.

Objectives: Around 11% of U.S. children are diagnosed with attention-deficit/hyperactivity disorder (ADHD).

The influence of perceived stress and motivation on telomere length among NCAA swimmers.

Introduction: Telomere length (TL) shortening is associated with increased cellular senescence and functional decline with age. Regular physical activity is posited to safeguard against TL shortening, but there is disagreement on how concurrent psychosocial stress may influence this relationship. The current analysis explored whether psychosocial stress is associated with TL differences in highly physically active individuals.

Constricted semantic relations in acute depression.

Background: It has been suggested that mood influences the breadth of associated information available for retrieval, with positive mood broadening and negative mood constricting the scope of associations. In this study, we asked whether this mood-associations connection is related to controlled processes which were linked to clinical symptoms in depression.

Methods: We used the semantic priming paradigm, which allows the dissociation of automatic and controlled processes by using short and long intervals between prime and target words.

Consensus Statement on Sports-Related Concussions in Youth Sports Using a Modified Delphi Approach.

Importance: Given the importance of sports-related concussions among youth athletes, the rapid progress of research on this topic over the last decade, and the need to provide further guidance to youth athletes, their families, medical professionals, and athletic personnel and organizations, a panel of experts undertook a modified Delphi consensus process to summarize the current literature and provide recommendations regarding the prevention, assessment, and management of sports-related concussions for young athletes.

Methods: A consensus panel of 11 experts was created to represent a broad spectrum of expertise in youth sports and concussions. The specific questions to be addressed were developed through an iterative process consisting of 3 rounds, and a review of the literature was conducted to identify research studies related to each question.

Years of caregiving for chronically ill and disabled family members is not associated with telomere length in the Philippines.

Background: Caring for chronically disabled family members is a stressful experience. In turn, psychosocial stress is linked to premature aging. Telomere length (TL) is a plastic genetic trait that is a biomarker of aging, and a possible mechanism linking psychosocial stress and accelerated aging.

Lifetime socioeconomic status and early life microbial environments predict adult blood telomere length in the Philippines.

Objectives: Psychosocial stress is postulated to hasten senescence in part by accelerating the shortening of telomere length (TL). One pathway through which this may happen is via increasing inflammation and innate immune system activation-a pathway which recent studies suggest acts more strongly for those who grew up in low microbial environments. Thus, we hypothesized that: (1) Psychosocial stress will be inversely associated with TL, (2) early life microbial environments will predict TL, and (3) microbial environments will moderate the association between psychosocial stress and TL.

Challenges and strategies for implementing mental health measurement for research in low-resource settings.

The gap between need and access to mental health care is widest in low-resource settings. Health systems in these contexts devote few resources to expanding mental health care, and it is missing from the agenda of most global health donors. This is partially explained by the paucity of data regarding the nature and extent of the mental health burden in these settings, so accurate and comparable measurement is essential to advocating for, developing, and implementing appropriate policies and services.

Linking major depression and the neural substrates of associative processing.

It has been proposed that mood correlates with the breadth of associative thinking. Here we set this hypothesis to the test in healthy and depressed individuals. Generating contextual associations engages a network of cortical regions including the parahippocampal cortex (PHC), retrosplenial complex, and medial prefrontal cortex.

Male more than female infants imitate propulsive motion.

Few experimental studies investigate the mechanisms by which young children develop sex-typed activity preferences. Gender self-labeling followed by selective imitation of same-sex models currently is considered a primary socialization mechanism. Research with prenatally androgenized girls and non-human primates also suggests an innate male preference for activities that involve propulsive movement.