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Related Concept Videos

Human Genetics01:28

Human Genetics

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...
Genetic Lingo01:11

Genetic Lingo

Overview
Inheritance01:25

Inheritance

Gregor Mendel's pioneering work on the principles of inheritance fundamentally transformed our understanding of how traits are transmitted from generation to generation. His experiments with pea plants laid the groundwork for the discovery of genes, discrete units within organisms that control heredity.
Each gene exists in pairs, and the combination of these genes from both parents forms an individual's genotype. This genotype is a blueprint of potential traits. Examples of genotype traits...
Incomplete Dominance01:43

Incomplete Dominance

Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
Pleiotropy01:33

Pleiotropy

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,...
Bipolar Disorder01:30

Bipolar Disorder

Bipolar disorder is a chronic mental health condition marked by significant mood fluctuations, including episodes of mania and depression. Elevated energy levels, heightened mood or irritability, impulsive behavior, reduced sleep needs, rapid speech, racing thoughts, inflated self-esteem, and distractibility characterize mania. Individuals with bipolar disorder often alternate between depressive and manic states, with periods of emotional stability lasting an average of six months to a year.

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Related Experiment Video

Updated: Jun 3, 2026

Measurement of Fronto-limbic Activity Using an Emotional Oddball Task in Children with Familial High Risk for Schizophrenia
13:08

Measurement of Fronto-limbic Activity Using an Emotional Oddball Task in Children with Familial High Risk for Schizophrenia

Published on: December 2, 2015

Intermediate phenotypes in psychiatric disorders.

Roberta Rasetti1, Daniel R Weinberger

  • 1Clinical Brain Disorders Branch, Genes, Cognition, and Psychosis Program, NIMH, NIH, Bethesda, MD, USA.

Current Opinion in Genetics & Development
|March 8, 2011
PubMed
Summary
This summary is machine-generated.

Genetic studies of psychiatric disorders are exploring intermediate biological phenotypes using neuroimaging. This approach reveals how risk genes affect brain circuitry and cognitive functions, improving understanding of disorder genetics and pathophysiology.

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Developing a Rat Model for Bipolar Disorder
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Measurement of Fronto-limbic Activity Using an Emotional Oddball Task in Children with Familial High Risk for Schizophrenia
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Area of Science:

  • Neuroscience
  • Psychiatry
  • Genetics

Background:

  • Psychiatric disorders exhibit small effect sizes for individual risk factors, likely due to biological heterogeneity and diagnostic imprecision.
  • Genetic studies increasingly focus on intermediate biological phenotypes to bridge the gap between risk genes and clinical symptoms.

Purpose of the Study:

  • To investigate the utility of neuroimaging-based intermediate phenotypes in understanding the genetic underpinnings of psychiatric disorders.
  • To elucidate the biological mechanisms through which risk genes influence neural circuitry and cognitive functions relevant to psychiatric conditions.

Main Methods:

  • Utilizing neuroimaging techniques to identify and analyze intermediate phenotypes.
  • Correlating genetic risk factors with observed neural circuit alterations and cognitive performance in patient and control populations.

Main Results:

  • Neuroimaging-based intermediate phenotypes effectively map gene effects onto specific brain processes.
  • Evidence suggests discrete, dissociable biological mechanisms of risk genes at the neural circuitry and cognitive function levels.

Conclusions:

  • Neuroimaging-based intermediate phenotypes offer a promising avenue for psychiatric genetics research.
  • This approach enhances understanding of the genetics and pathophysiology of psychiatric disorders by linking molecular effects to observable brain mechanisms.