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Related Concept Videos

Anxiety: Overview01:18

Anxiety: Overview

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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.
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Functional Brain Systems: Limbic System01:15

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The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
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Brain Imaging01:14

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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
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Generalized Anxiety Disorder01:30

Generalized Anxiety Disorder

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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...
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Related Experiment Video

Updated: Dec 29, 2025

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Task MRI-Based Functional Brain Network of Anxiety.

Chien-Han Lai1,2,3

  • 1Psychiatry & Neuroscience Clinic, Taoyuan, Taiwan. stephenlai99@gmail.com.

Advances in Experimental Medicine and Biology
|February 1, 2020
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Summary
This summary is machine-generated.

Task-based functional connectivity MRI studies reveal altered brain networks in anxiety disorders. Key findings show limbic and frontal region dysregulation, crucial for understanding anxiety

Keywords:
FrontalGeneralized anxiety disorder (GAD)LimbicPanic disorder (PD)PhobiaSocial anxiety disorder (SAD)Task MRI-based

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Medical Imaging

Background:

  • Magnetic Resonance Imaging (MRI) offers translational insights into brain mechanisms.
  • Psychiatric disorders often present subtle alterations, necessitating functional studies like functional connectivity.
  • Understanding brain pathophysiology in mental disorders is critical.

Purpose of the Study:

  • To review task-based functional connectivity MRI studies in anxiety disorders.
  • To highlight the role of limbic and frontal regions in anxiety pathophysiology.

Main Methods:

  • Task-based functional Magnetic Resonance Imaging (fMRI).
  • Analysis of functional connectivity in brain networks.
  • Focus on specific anxiety disorders: social anxiety disorder, panic disorder (PD), specific phobia, and generalized anxiety disorder.

Main Results:

  • Social anxiety disorder shows altered functional connectivity between the limbic system (temporal lobe, amygdala, hippocampus) and frontal regions (anterior cingulate, prefrontal, orbitofrontal cortices).
  • Panic disorder exhibits alterations in anterior cingulate cortex-amygdala connectivity (fear conditioning), frontoparietal networks (attention), and limbic-prefrontal circuits (emotion).
  • Specific phobia and generalized anxiety disorder also demonstrate aberrant amygdala-based functional connectivity and mesocorticolimbic/limbic-prefrontal alterations, respectively.

Conclusions:

  • Task MRI-based functional connectivity highlights the involvement of limbic and frontal regions in the neural underpinnings of anxiety.
  • These altered networks are vital for understanding the origination of anxiety across various contexts and tasks.
  • Functional connectivity MRI is a valuable tool for investigating the complex pathophysiology of anxiety disorders.