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Related Experiment Video

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Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder

Published on: April 26, 2024

Depression symptom severity and error-related brain activity.

Doreen M Olvet¹, Daniel N Klein, Greg Hajcak

¹The Zucker Hillside Hospital, Psychiatry Research, North Shore-Long Island Jewish Health System, Glen Oaks, NY 11004, USA. dolvet@nshs.edu

Psychiatry Research

|July 16, 2010

Summary

Individuals with major depressive disorder (MDD) show altered neural responses to errors. Severe depression is linked to reduced brain signal differentiation between correct and incorrect responses, impacting error monitoring.

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Area of Science:

Neuroscience
Psychiatry
Cognitive Science

Background:

Major depressive disorder (MDD) is associated with altered cognitive functions.
Neural correlates of response monitoring, including event-related potentials (ERPs) like the error-related negativity (ERN), correct response negativity (CRN), and error positivity (Pe), are implicated in depression.
Previous research on ERPs in MDD has yielded inconsistent findings.

Purpose of the Study:

To investigate the relationship between depression severity and neural correlates of response monitoring using ERPs.
To compare ERPs associated with error processing in unmedicated individuals with MDD and healthy controls.

Main Methods:

An arrow flanker task was administered to 22 unmedicated individuals with MDD and 22 healthy controls.
Event-related potentials (ERPs), including ERN, CRN, and Pe, were recorded.
The differentiation between ERPs on error and correct trials (DeltaERN, DeltaPe) was analyzed in relation to depression severity.

Main Results:

No significant overall differences in ERN or CRN were found between groups.
In the MDD group, greater depression severity correlated with an increased CRN and a reduced DeltaERN.
Individuals with MDD exhibited a reduced DeltaPe compared to healthy controls, indicating impaired differentiation between error and correct trial ERPs.

Conclusions:

Neural differentiation between correct and erroneous responses is diminished in individuals with severe depression.
These findings suggest that altered error monitoring and awareness, as reflected by ERPs, are associated with the severity of depressive symptoms.