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Related Concept Videos

Human Genetics01:28

Human Genetics

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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...
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Genome-wide Association Studies-GWAS01:11

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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
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Behavioral Genetics and Its Designs01:23

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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.
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Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...
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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...
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Related Experiment Video

Updated: Jun 3, 2025

Generalized Psychophysiological Interaction PPI Analysis of Memory Related Connectivity in Individuals at Genetic Risk for Alzheimer's Disease
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Variables associated with cognitive function: an exposome-wide and mendelian randomization analysis.

Yong-Li Zhao1,2, Yi-Ning Hao1, Yi-Jun Ge1

  • 1Department of Neurology, Institute of Neurology, State Key Laboratory of Medical Neurobiology and MOE Frontier Center for Brain Science, Shanghai Medical College, Huashan Hospital, Fudan University, 12th Wulumuqi Zhong Road, Shanghai, 200040, China.

Alzheimer'S Research & Therapy
|January 8, 2025
PubMed
Summary
This summary is machine-generated.

Identifying key factors influencing cognitive function is crucial for preventing cognitive decline. This study found 41 significant variables, including lifestyle and socioeconomic factors, associated with cognitive performance and decline, offering insights for dementia prevention.

Keywords:
AssessmentCognitive functionDementiaEWASMRRisk factors

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Area of Science:

  • Neuroscience
  • Genetics
  • Public Health

Background:

  • Cognitive function is susceptible to environmental influences.
  • Understanding these influences is key to preventing cognitive decline and dementia.

Purpose of the Study:

  • To identify variables associated with cognitive function.
  • To investigate associations with cognitive decline and dementia risk.

Main Methods:

  • Analysis of 164,463 UK Biobank participants with four cognitive assessments.
  • Rigorous screening of 364 variables, followed by univariate, multivariable, and longitudinal analyses.
  • Mendelian randomization (MR) analyses and pooled evidence quality evaluation were performed.

Main Results:

  • 41 variables significantly associated with cognitive function identified, including education, lifestyle, and health factors.
  • 12 variables linked to longitudinal cognitive decline; 5 confirmed by two-sample MR.
  • Favorable lifestyle changes associated with reduced dementia and Alzheimer's disease (AD) risk by 38% and 34%.

Conclusions:

  • A comprehensive database of variables influencing cognitive function was established.
  • Findings support the potential for lifestyle modifications in dementia prevention.
  • This evidence base can inform strategies for maintaining cognitive health across the lifespan.