Behavioral activation can normalize neural hypoactivation in subthreshold depression during a monetary incentive...

Area of Science:

• Neuroscience
• Psychiatry
• Psychology

Background:

• Late adolescents face increased risk for depressive symptoms.
• Behavioral activation (BA) is effective for subthreshold depression, potentially preventing major depressive disorder.
• Neural mechanisms of BA efficacy require further elucidation.

Purpose of the Study:

• Investigate neural responses during reward processing in individuals with subthreshold depression.
• Clarify the neural mechanisms underlying the efficacy of behavioral activation therapy.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used in late adolescent university students with subthreshold depression (n=15) and controls (n=15).
• Participants completed a monetary incentive delay task.
• The subthreshold depression group received weekly BA sessions between two fMRI scans; no medication was administered.

Main Results:

• Behavioral activation significantly reduced depressive symptoms.
• The BA group exhibited functional brain changes in the left ventrolateral prefrontal cortex and angular gyrus during loss anticipation.
• These changes were distinct from those observed in the control group.

Conclusions:

• Behavioral activation therapy enhances fronto-parietal region functioning during loss anticipation.
• Findings contribute to understanding the neural underpinnings of specific psychotherapies.