Related Experiment Video
Updated: Mar 3, 2026
05:44
Author Spotlight: Collecting the Brain and Serum from the Same Mice Fetus to Study Brain Tumor Development
Published on: May 17, 2024
1.2K
Bidirectional Causal Relationships Between Obesity and Executive Function in Children and Adolescents: A Genetic
Jia Zheng1,2, Yanan Ma3, Xuxiu Zhuang1,4
1Institute of Health Science Shenyang, China Medical University, Shenyang, Liaoning Province, China.
Developmental Science
|March 2, 2026
Summary
Obesity in youth causally impairs executive functions like cognitive flexibility. However, executive function deficits do not cause obesity, indicating a one-way relationship. This highlights the need for obesity prevention to support cognitive health.
Area of Science:
- Neuroscience
- Developmental Psychology
- Genetics
Background:
- Obesity is a growing concern in youth, with potential impacts on cognitive development.
- Executive functions (EF) are crucial for goal-directed behavior and are complexly linked to overall health.
- Understanding the causal direction between obesity and EF is vital for targeted interventions.
Purpose of the Study:
- To investigate the causal relationship between childhood obesity and executive functions (EF).
- To determine if obesity influences EF, or if EF deficits contribute to obesity.
- To explore the specific domains of EF affected by obesity, including cognitive flexibility, inhibitory control, and working memory.
Main Methods:
- Employed genetic instrumental variable analysis, specifically bidirectional two-stage least squares (2SLS).
- Utilized polygenic risk scores as genetic instruments in a sample of 406 children and adolescents.
- Measured EF using standard cognitive tests and adjusted for relevant covariates.
Main Results:
- Higher Body Mass Index (BMI) causally impaired cognitive regulation, significantly impacting measures of cognitive flexibility and attention.
- Specific effects observed included increased perseverative responses and difficulties with task completion and switching.
- No evidence was found for a causal effect of executive function deficits on obesity development.
Conclusions:
- Obesity in youth causally impairs executive functions, particularly cognitive flexibility.
- The relationship is unidirectional, with obesity negatively impacting cognitive abilities, not vice versa.
- Obesity prevention is crucial for maintaining cognitive health in children and adolescents.
Related Concept Videos
01:23Behavioral Genetics and Its Designs
1.2K
Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
1.2K
01:28Human Genetics
1.8K
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The complex relationship between genetics and psychology is observable through common biological components such...
1.8K
01:24Obesity
1.4K
The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in...
1.4K
01:20Gene-Environment Interactions
1.3K
Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
1.3K
01:30Biological Influences on Intelligence
616
Intelligence is often thought to be linked to brain size, but the relationship is more complex than that. While brain size does correlate modestly with some abilities, like verbal skills, the connection is weaker for others, such as spatial reasoning. Other factors, like brain structure, also play crucial roles. For instance, despite Einstein's smaller-than-average brain, his parietal cortex, which is involved in spatial reasoning, was 15% wider, suggesting that neural density might matter...
616
01:29Environmental Influences on Intelligence
1.0K
Despite the strong genetic influence on traits like intelligence, environmental factors significantly shape outcomes. For example, while over 90% of height variation is due to genetic differences, environmental factors such as nutrition also have a notable impact. Similarly, for intelligence, changes in a child's surroundings can significantly alter their IQ. Research shows that enriched environments boost children's academic success and help them develop key cognitive skills. Children...
1.0K