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Irritable Bowel Syndrome I: Introduction01:17

Irritable Bowel Syndrome I: Introduction

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Irritable Bowel Syndrome (IBS) is characterized by functional disturbances in the gastrointestinal system, presenting a cluster of symptoms without evident structural or biochemical abnormalities. It primarily affects the large intestine and may cause abdominal pain, bloating, excessive gas, diarrhea, constipation, or both.
IBS is a chronic condition that can persist over a long period or recur frequently.
The pathogenesis of IBS involves a complex interplay of the following factors:
Altered...
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Traits and States01:17

Traits and States

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Personality traits represent consistent patterns in behavior, thoughts, and emotions, reflecting an individual's tendencies across various situations. For example, extraversion, a well-known trait, manifests in individuals as talkative, energetic, and enthusiastic behaviors. These traits are stable over time, offering a reliable framework for predicting how people might act in different contexts. However, they do not define every moment of an individual's life. In contrast to traits,...
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Schizophrenia, a complex psychiatric disorder, has been historically misunderstood. Early psychological theories attributed its origins to childhood trauma and unresponsive parenting. However, contemporary research largely rejects these notions, favoring the vulnerability-stress hypothesis. This model proposes that individuals with a genetic predisposition to schizophrenia may develop the disorder following exposure to significant environmental stressors. Notably, studies on high-risk...
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Irritable Bowel Syndrome II: Clinical Features and Diagnostic Evaluation
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Theoretical Approaches to Psychological Disorder01:29

Theoretical Approaches to Psychological Disorder

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The development of psychological disorders, which are characterized by deviant, maladaptive, and personally distressing behaviors, has been explored through several theoretical approaches.
Biological approach
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Depressive disorders result from a complex interplay of biological, psychological, and sociocultural factors, each contributing uniquely to the development and persistence of the condition. Understanding these factors provides critical insight into the multifaceted nature of depression.
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Irritability as a Transdiagnostic Vulnerability Trait:Current Issues and Future Directions.

Theodore P Beauchaine1, Jennifer L Tackett2

  • 1The Ohio State University.

Behavior Therapy
|March 7, 2020
PubMed
Summary

Irritability may stem from low dopamine (DA) levels and reactivity, impacting appetitive behaviors. Understanding irritability

Keywords:
affectivityanhedoniaemotionalityimpulsivityirritability

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Psychology

Background:

  • Irritability is increasingly recognized for its links to various psychopathologies.
  • Limited research exists on irritability's relationship with temperament and personality constructs.
  • Neurobiological underpinnings of irritability are viewed diversely.

Purpose of the Study:

  • To integrate irritability research within child temperament and adult personality frameworks.
  • To propose a neurobiological model of irritability.
  • To suggest advanced statistical methods for future research.

Main Methods:

  • Literature review and theoretical modeling.
  • Examination of neuroimaging findings across diagnostic groups and general populations.
  • Proposal for hierarchical Bayesian modeling.

Main Results:

  • A model is proposed where irritability arises from low tonic and phasic dopamine (DA) activity in subcortical structures.
  • Neuroimaging results differ based on whether irritability is studied in specific diagnostic groups or general samples.
  • Hierarchical Bayesian modeling is suggested to capture complex trait dependencies.

Conclusions:

  • Irritability's neurobiological basis may involve dopamine pathways related to reward processing.
  • Methodological approaches influence findings in irritability research.
  • Advanced statistical techniques are needed to fully understand irritability's dispositional nature and treatment implications.