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Anxiety: Overview

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.

Brain Imaging

Brain Imaging

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 Stimulation (TMS).

Generalized Anxiety Disorder

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...

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Related Experiment Video

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Developing Neuroimaging Phenotypes of the Default Mode Network in PTSD: Integrating the Resting State, Working Memory, and Structural Connectivity

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Neuroimaging in anxiety disorders.

Kirsten Engel¹, Borwin Bandelow, Oliver Gruber

¹Department of Psychiatry and Psychotherapy, Anxiety Research Unit, University of Goettingen, von-Siebold-Strasse 5, 37075 Goettingen, Germany.

Journal of Neural Transmission (Vienna, Austria : 1996)

|June 24, 2008

Summary

Neuroimaging reveals a complex brain network underlying anxiety disorders, involving limbic and cortical regions. This research differentiates normal from pathological anxiety using brain imaging techniques.

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Area of Science:

Neuroscience
Psychiatry
Medical Imaging

Background:

Neuroimaging is crucial for understanding anxiety disorder neurobiology.
Evidence suggests a complex brain network implicated in anxiety.
Distinguishing normal from pathological anxiety is key.

Purpose of the Study:

To review neuroimaging studies on anxiety disorders.
To validate neurobiological network hypotheses for anxiety.
To explore brain region involvement and lateralization.

Main Methods:

Functional imaging procedures.
Radioligand binding studies.
Comparative analysis of healthy subjects and patients.

Main Results:

Confirmed a complex anxiety network including limbic, brainstem, temporal, and prefrontal cortical regions.
Observed differential effects of brain regions and lateralization in various anxiety disorders.
Highlighted differences between normal and pathological anxiety manifestations.

Conclusions:

Neuroimaging provides strong evidence for a distinct anxiety network.
Further research is needed to refine understanding of specific brain region roles and lateralization in anxiety disorders.