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Related Concept Videos

Irritable Bowel Syndrome I: Introduction01:17

Irritable Bowel Syndrome I: Introduction

939
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...
939
Irritable Bowel Syndrome II: Clinical Features and Diagnostic Evaluation01:30

Irritable Bowel Syndrome II: Clinical Features and Diagnostic Evaluation

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Irritable Bowel Syndrome II: Clinical Features and Diagnostic Evaluation
Irritable Bowel Syndrome (IBS) is classified into subtypes based on the predominant bowel habits as determined by the Bristol Stool Form Scale (BSFS). The subtypes are:
743
Irritable Bowel Syndrome III: Medical and Nursing Management01:30

Irritable Bowel Syndrome III: Medical and Nursing Management

654
Managing Irritable Bowel Syndrome (IBS) involves a multifaceted approach, including lifestyle modifications, dietary changes, and medication.
654

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Related Experiment Video

Updated: Jan 22, 2026

Eye Irritation Test EIT for Hazard Identification of Eye Irritating Chemicals using Reconstructed Human Cornea-like Epithelial RhCE Tissue Model
10:13

Eye Irritation Test EIT for Hazard Identification of Eye Irritating Chemicals using Reconstructed Human Cornea-like Epithelial RhCE Tissue Model

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Getting irritable about irritability?

Gin Malhi1,2, Erica Bell1,2, Tim Outhred1,2

  • 1Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia.

Evidence-Based Mental Health
|June 29, 2019
PubMed
Summary
This summary is machine-generated.

Irritability lacks a standard definition in psychiatry, hindering research consistency. A new approach defines irritability as a product of expectation-reality discrepancies, enabling neurocognitive mapping and precise experimental testing.

Keywords:
psychiatry

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Area of Science:

  • Psychiatry
  • Neuroscience
  • Psychology

Background:

  • Irritability is a common symptom across various psychiatric disorders.
  • Current psychiatric understanding lacks a standardized definition and measurement for irritability.
  • Inconsistent definitions lead to variability in research and hinder progress.

Purpose of the Study:

  • To propose a new, neurocognitively testable definition of irritability.
  • To address the lack of a standardized definition and measurement in psychiatry.
  • To foster a more precise and collaborative approach to studying irritability.

Main Methods:

  • Conceptualizing irritability as a discrepancy between expectations and reality.
  • Developing a bottom-up definition not solely reliant on phenomenology.
  • Proposing a framework for neurocognitive mapping and experimental testing.

Main Results:

  • A novel definition of irritability based on expectation-reality gaps is presented.
  • This definition allows for more precise neurocognitive investigation.
  • The proposed framework facilitates consistent and sophisticated research.

Conclusions:

  • A standardized, neurocognitively grounded definition of irritability is crucial for advancing psychiatric research.
  • This new approach moves beyond phenomenology to enable experimental validation.
  • Multidisciplinary collaboration is essential for establishing a unified understanding of irritability.