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Post-traumatic Stress Disorder

Post-traumatic Stress Disorder

Post-traumatic stress disorder (PTSD) is a psychiatric condition that arises following exposure to traumatic events such as natural disasters, forced displacement, or severe accidents. It significantly impairs individuals' ability to cope with daily activities and disrupts their emotional and psychological equilibrium.
Symptoms and Behavioral Manifestations
A spectrum of distressing symptoms characterizes PTSD. Recurrent flashbacks, where individuals involuntarily relive traumatic events,...

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Biomarkers in an Animal Model for Revealing Neural, Hematologic, and Behavioral Correlates of PTSD

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Characterizing PTSD Using Electrophysiology: Towards A Precision Medicine Approach.

Natasha Kovacevic¹, Amir Meghdadi¹, Chris Berka¹

¹Advanced Brain Monitoring, Carlsbad, CA, USA.

Clinical EEG and Neuroscience

|January 7, 2025

Summary

This summary is machine-generated.

Electroencephalography (EEG) and electrocardiogram (ECG) measures can identify post-traumatic stress disorder (PTSD) and its associated anxiety and depression. These electrophysiological biomarkers offer objective assessment of mood disturbances in PTSD.

Keywords:

ERP N2 anxiety heart rate variability late positive potential

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Area of Science:

Neuroscience and Psychiatry
Biomarkers and Physiological Measures

Background:

Resting-state EEG and event-related potential (ERP) components show potential in distinguishing PTSD from controls.
Previous meta-analyses show inconsistent findings, limiting understanding of PTSD biomarkers.
A need exists for concise electrophysiological biomarkers applicable across psychiatric conditions and specific PTSD dimensions.

Purpose of the Study:

To develop a concise set of electrophysiological biomarkers using neutral cognitive tasks.
To identify biomarkers associated with anxiety and depression in post-traumatic stress disorder (PTSD).
To assess the utility of EEG, ERP, and ECG measures for classifying PTSD and its symptom dimensions.

Main Methods:

Continuous simultaneous electroencephalography (EEG) and electrocardiogram (ECG) recordings were obtained from veterans with PTSD (n=29) and healthy controls (n=62).
Participants completed computerized tasks involving neutral cognitive stimuli.
EEG, ERP, and heart rate variability measures were analyzed for group discrimination and correlation with psychological measures.

Main Results:

The PTSD group exhibited faster alpha oscillations, reduced alpha power, and a flatter power spectrum compared to controls.
Reduced alpha power correlated with higher trait anxiety, and a flatter slope correlated with increased depression severity in PTSD.
ERP analysis revealed delayed/exaggerated early components and attenuated late positive potential (LPP) amplitudes in PTSD during visual memory and sustained attention tasks.

Conclusions:

Distinct and complementary EEG signatures were identified across three cognitive tasks in individuals with PTSD.
Multimodal biomarkers integrating EEG, cognitive ERPs, and ECG show promise for objective assessment.
These biomarkers can aid in evaluating mood and anxiety disturbances within the PTSD spectrum.