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Related Concept Videos

Anxiety: Overview01:18

Anxiety: Overview

Anxiety is a common mental disorder featuring excessive worry, fear, and apprehension, significantly affecting daily life. People with anxiety disorders experience persistent and intense anxiety, interrupting their everyday functioning.
Individuals with anxiety often experience a range of physical and emotional symptoms, including sweating, trembling, tachycardia, and disturbances in sleep patterns. These symptoms vary in intensity and frequency but are generally disruptive and distressing.
Panic Disorder01:27

Panic Disorder

Panic disorder is an anxiety disorder characterized by recurrent and sudden minutes-long episodes of intense fear, known as panic attacks. These attacks may feel like heart attacks and often happen without warning or a specific cause. They can include symptoms such as rapid heart rate, shortness of breath, chest pain, trembling, sweating, dizziness, and a sense of helplessness. During a panic attack, individuals may feel as though they are experiencing a heart attack or are in a...
Generalized Anxiety Disorder01:30

Generalized Anxiety Disorder

Generalized Anxiety Disorder (GAD) is a chronic condition characterized by excessive and uncontrollable worry that persists for at least six months, significantly interfering with daily functioning. Unlike situational anxiety, which arises in response to specific stressors, GAD often occurs without a clear cause. Individuals may experience disproportionate worry about work, health, or relationships. For instance, a person might continuously fear poor health despite normal medical evaluations or...
Social Anxiety Disorder01:28

Social Anxiety Disorder

Social anxiety disorder, also known as social phobia, is characterized by an intense fear of social situations where one might face humiliation, rejection, embarrassment, or negative evaluation. This disorder leads individuals to avoid activities like casual conversations, public speaking, or seemingly simple tasks such as eating, signing documents, or swimming, in public settings. Its impact extends beyond discomfort, often significantly interfering with daily functioning and quality of life.
Anxiolytic Drugs: Overview01:26

Anxiolytic Drugs: Overview

Anxiolytic drugs are vital in managing anxiety disorders by effectively alleviating symptoms such as excessive fear, tachycardia, and tremors. There are several classes of anxiolytic medications, each with unique mechanisms of action and potential side effects.
Primary Types of Anxiolytic Drugs
1. Benzodiazepines:
Benzodiazepines bind to the GABA-A receptor in the brain, enhancing GABA's interaction. This action reduces neurotransmission, effectively blocking anxiety-associated limbic circuitry.
Anxiolytic Drugs: Benzodiazepines and Buspirone01:29

Anxiolytic Drugs: Benzodiazepines and Buspirone

Benzodiazepines are a class of anxiolytic drugs known for their rapid efficacy and high therapeutic-to-lethal dose ratio, but with a potential risk of drug dependence. These drugs are lipophilic, allowing for rapid absorption after oral administration, eventually reaching the central nervous system (CNS). Once in the CNS, benzodiazepines bind to the allosteric site of the GABAA receptor. This binding enhances the inhibitory effects of the neurotransmitter GABA. By doing so, they prevent...

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Related Experiment Video

Updated: May 25, 2026

Using the Threat Probability Task to Assess Anxiety and Fear During Uncertain and Certain Threat
11:18

Using the Threat Probability Task to Assess Anxiety and Fear During Uncertain and Certain Threat

Published on: September 12, 2014

[Anxiety disorder].

Takeshi Inoue1, Tsukasa Koyama

  • 1Department of Psychiatry, Hokkaido University Graduate School of Medicine, Sapporo, Japan.

Brain and Nerve = Shinkei Kenkyu No Shinpo
|February 7, 2012
PubMed
Summary
This summary is machine-generated.

Biological studies reveal key neural circuits and neurotransmitters involved in anxiety disorders. Advances in understanding fear conditioning and amygdala function inform new therapeutic strategies for anxiety.

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Social Isolation Model: A Noninvasive Rodent Model of Stress and Anxiety
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Social Isolation Model: A Noninvasive Rodent Model of Stress and Anxiety

Published on: November 11, 2022

Related Experiment Videos

Last Updated: May 25, 2026

Using the Threat Probability Task to Assess Anxiety and Fear During Uncertain and Certain Threat
11:18

Using the Threat Probability Task to Assess Anxiety and Fear During Uncertain and Certain Threat

Published on: September 12, 2014

Social Isolation Model: A Noninvasive Rodent Model of Stress and Anxiety
04:20

Social Isolation Model: A Noninvasive Rodent Model of Stress and Anxiety

Published on: November 11, 2022

Area of Science:

  • Neuroscience
  • Psychiatry
  • Pharmacology

Context:

  • Recent advances in biological studies of anxiety disorders.
  • Discovery of neural circuits of fear using animal models.
  • Elucidation of neurotransmitters and neuronal mechanisms in fear conditioning.

Purpose:

  • To review recent advances in the biological understanding of anxiety disorders.
  • To connect findings from animal models to human neuroimaging.
  • To explore novel treatment strategies.

Summary:

  • The amygdala is central to fear generation and its hyperactivation is implicated in anxiety disorders.
  • Selective serotonin reuptake inhibitors (SSRIs) are first-line anxiolytics, hypothesized to work by inhibiting amygdala activity.
  • New treatments like D-cycloserine, propranolol, and reactivation-extinction procedures are emerging from fear conditioning research.

Impact:

  • Improved understanding of anxiety disorder pathogenesis.
  • Foundation for developing targeted pharmacological and psychotherapeutic interventions.
  • Established efficacy of D-cycloserine as an adjunct therapy for anxiety disorders.