The association between high-power transient spectral beta events and depression in an elevated trait anxious sample

Area of Science:

• Neuroscience
• Psychiatry
• Biomarkers

Background:

• Traditional averaged electroencephalography (EEG) power analysis overlooks transient, oscillatory, burst-like events.
• Beta band transient events are associated with depression, but the influence of comorbidities like anxiety is unclear.

Purpose of the Study:

• To investigate the association between features of beta band transient events and depression severity.
• To examine these associations in adults with elevated trait anxiety.

Main Methods:

• Secondary analysis of resting-state EEG data from 29 adults with elevated trait anxiety.
• Calculation of rate, power, duration, and frequency span of transient oscillatory events across delta/theta, alpha, and beta bands at 13 electrodes.
• Assessment of depression severity and classification of moderate depression presence/absence.

Main Results:

• Increased beta event duration showed a positive association with depression severity at electrodes P4 and O2.
• Beta event duration effectively distinguished individuals with and without clinically moderate depression.
• No other beta event features were significantly associated with depression severity in this sample.

Conclusions:

• Beta event duration is a potential neurophysiological biomarker for depression, even in the presence of anxiety.
• Further research is warranted to explore the clinical utility of beta events as a depression biomarker.