Facial and autonomic activity in depression: social context differences during imagery

Area of Science:

• Psychology
• Neuroscience
• Psychophysiology

Background:

• Depression is associated with reduced facial expressivity and blunted responses to social cues.
• Previous studies suggest individuals with depression show diminished social context modulation in emotional responses.

Purpose of the Study:

• To investigate social context differences in facial electromyogram (EMG), self-reported emotion, skin conductance level, and heart rate in depressed and non-depressed women.
• To examine how visualizing social versus solitary situations impacts emotional and physiological responses in depression.

Main Methods:

• Utilized facial EMG, self-report measures, skin conductance, and heart rate to assess 21 depressed and 22 non-depressed women.
• Participants imagined happy and sad scenarios, both with and without visualizing other people.

Main Results:

• Depressed subjects lacked social context differences in EMG-brow activity during sad imagery, unlike non-depressed subjects who showed increased brow activity.
• Depressed subjects exhibited increased heart rate during sad-social imagery compared to sad-solitary.
• Both groups showed increased EMG-cheek activity and heart rate during happy-social versus happy-solitary imagery.

Conclusions:

• A lack of frowning modulation and altered heart rate responses in social contexts suggest impaired psychosocial functioning in depression.
• Findings indicate distinct patterns of emotional and physiological reactivity to social cues in individuals with depression.