Resting-state functional connectivity differentiates anxious apprehension and anxious arousal

Area of Science:

• Neuroscience
• Cognitive Psychology
• Psychiatry

Background:

• The default mode network (DMN) is crucial for self-referential thought and shows altered connectivity in various psychological conditions.
• Anxiety dimensions, such as anxious apprehension and anxious arousal, may differentially affect DMN function.
• Understanding these neural underpinnings is key to differentiating anxiety subtypes and their cognitive impacts.

Purpose of the Study:

• To investigate the distinct effects of anxious apprehension and anxious arousal on resting-state functional connectivity within the DMN.
• To examine how these anxiety dimensions disrupt cognitive processes, independent of depressive symptoms.

Main Methods:

• Whole-brain, seed-based resting-state functional connectivity analyses were employed.
• Participants' levels of anxious apprehension and anxious arousal were assessed.
• Analyses controlled for depressive symptoms to isolate anxiety-specific effects.

Main Results:

• Significant differences in DMN functional connectivity were observed between anxious apprehension and anxious arousal.
• Higher anxious apprehension correlated with lower DMN connectivity, suggesting impaired inner-focused cognition.
• Higher anxious arousal correlated with higher DMN connectivity, potentially reflecting heightened threat monitoring.

Conclusions:

• Anxious apprehension and anxious arousal represent distinct psychological constructs with unique neural signatures within the DMN.
• These findings contribute to a more nuanced understanding of how anxiety dimensions impact brain function and cognition.
• The study highlights the importance of differentiating anxiety subtypes for targeted interventions.