Pupillary response to cognitive control in depression-prone individuals

Area of Science:

• Cognitive Neuroscience
• Psychiatry
• Psychophysiology

Background:

• Pupillary correlates are emerging biomarkers for understanding depression.
• Early detection of depression-prone individuals can facilitate timely intervention and treatment.

Purpose of the Study:

• To investigate the pupillary correlates of depression-prone individuals during cognitive control tasks.
• To examine differences in task-evoked pupillary responses (TEPR) between depression-prone and healthy individuals.

Main Methods:

• Recruited 31 depression-prone and 31 healthy participants.
• Administered an emotional task-switching task combined with a go/no-go task.
• Recorded task-evoked pupillary responses (TEPR) during task performance.

Main Results:

• No significant behavioral differences were observed in cognitive flexibility or inhibition.
• Depression-prone individuals showed lower TEPRs to positive stimuli during cue presentation.
• Depression-prone individuals exhibited smaller TEPRs and longer pupillary response latencies to negative no-go stimuli.

Conclusions:

• Depression-prone individuals may exhibit slower neural responses in cognitive control tasks.
• Findings suggest emotion-specific weakened cognitive control in depression-prone individuals.
• Pupillary responses offer insights into the psychophysiological underpinnings of depression proneness.