EEG coherence analysis in never-medicated patients with panic disorder

Area of Science:

• Neuroscience
• Psychiatry
• Clinical Neurophysiology

Background:

• Panic disorder (PD) is a debilitating psychiatric condition.
• Understanding the underlying central nervous system (CNS) dysfunction is crucial for effective treatment.
• Previous research suggests potential alterations in brain activity in PD patients.

Purpose of the Study:

• To investigate functional abnormalities in the CNS of never-medicated patients with PD.
• To compare electroencephalography (EEG) coherence between PD patients and healthy controls.
• To examine the relationship between EEG coherence, disease duration, and panic attack severity.

Main Methods:

• Electroencephalography (EEG) coherence was recorded in 18 never-medicated PD patients and age-matched controls during a resting state.
• Statistical analyses were performed to compare coherence values between groups and correlate them with clinical variables.

Main Results:

• PD patients exhibited significantly lower EEG coherence values compared to controls, particularly in frontal (F3-F4) and temporal (F7-T5, F8-T6) regions.
• Lower coherence was also observed in intra-hemispheric connections (C3-C4, P3-P4).
• Positive correlations were found between alpha band coherence and both disease duration and panic attack severity.

Conclusions:

• PD patients demonstrate reduced inter-hemispheric functional connectivity in frontal regions and intra-hemispheric connectivity in temporal regions.
• These findings suggest pathophysiological CNS changes in PD.
• Chronic PD or frequent panic attacks may be associated with these observed brain connectivity alterations.