Post-disaster depression and vigilance: a functional near-infrared spectroscopy study

Area of Science:

• Neuroscience
• Psychology
• Disaster Psychiatry

Background:

• Natural disasters like earthquakes can significantly impact mental health.
• Understanding the cognitive and neural correlates of post-disaster psychological distress is crucial for effective interventions.

Purpose of the Study:

• To investigate the relationship between self-reported depression and vigilance task performance after a major earthquake.
• To explore the association between frontal cerebral oxygenation, depression, and cognitive function in a post-disaster context.

Main Methods:

• Forty participants completed vigilance tasks and self-report measures of depression, anxiety, and stress post-earthquake.
• Functional near-infrared spectroscopy (fNIRS) was used to measure frontal cerebral oxygenation.
• Statistical analyses examined correlations between cognitive performance, psychological state, and neural activity.

Main Results:

• Excluding an outlier, a correlation was found between increased depressivity and slowed response times (response slowing) on vigilance tasks.
• When including the outlier, depressivity correlated with altered right hemisphere oxygenation.
• Findings suggest a link between moderate depressivity and impaired sustained attention.

Conclusions:

• Post-disaster depression is associated with decrements in sustained attention, indicated by response slowing.
• Frontal brain activity may be modulated by depressive symptoms in disaster survivors.
• These findings highlight the cognitive impact of psychological distress following traumatic events.