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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.
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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.
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Using the Threat Probability Task to Assess Anxiety and Fear During Uncertain and Certain Threat
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Anxious vision: Trait-like visual cortical hyperactivity in trait anxiety.

Zhaohan Wu1, Yuqi You1,2, Joshua A Brown3

  • 1Department of Psychology, Florida State University, Tallahassee, FL, USA.

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Summary

High trait anxiety is linked to hyperactivity in the early visual cortex, specifically the parvocellular pathway. This visual processing difference may stem from disrupted excitation-inhibition balance in individuals with high anxiety.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Sensory Processing

Background:

  • Sensory processing differences, like hypersensitivity, are linked to emotional traits and psychiatric disorders.
  • Existing theories suggest limbic and prefrontal regions modulate the sensory-emotion link, but empirical evidence is limited.
  • The sensory cortex is increasingly understood to support flexible, value-based processing.

Purpose of the Study:

  • To investigate the relationship between trait anxiety and early visual cortical activity.
  • To determine if sensory processing alterations in anxiety are specific to certain visual pathways.
  • To explore the neural mechanisms, such as excitation-inhibition balance, underlying sensory-emotion links in anxiety.

Main Methods:

  • Utilized high-density electroencephalography (hd-EEG) to measure visual evoked potentials (VEPs).
  • Conducted four experiments across three independent samples (N=150) with repeated assessments.
  • Analyzed activity in the early visual cortex, differentiating between parvocellular and magnocellular pathways.

Main Results:

  • Identified a reliable pattern of visual cortical hyperactivity in individuals with high trait anxiety.
  • This hyperactivity was specific to the parvocellular visual pathway, observed as early as 46 ms in V1.
  • Disrupted excitation-inhibition (E/I) ratio predicted parvocellular VEP magnitude in low, but not high, trait anxiety subjects.

Conclusions:

  • Early visual processing in trait anxiety exhibits hyperactivity, particularly in the parvocellular pathway.
  • This hyperactivity is a stable, trait-like characteristic, present across various stimuli and conditions.
  • Altered E/I balance in the visual cortex may underlie the sensory-emotion linkage in trait anxiety.