Visual Event-Related Potentials under External Emotional Stimuli in Bipolar I Disorder with and without...

Area of Science:

• Neuroscience
• Psychiatry
• Cognitive Psychology

Background:

• Hypersexuality is a notable symptom of bipolar I disorder, particularly during manic episodes.
• The neural underpinnings of emotional processing in bipolar I disorder with versus without hypersexuality remain unclear.
• Understanding these differences is crucial for targeted therapeutic interventions.

Purpose of the Study:

• To investigate differences in cerebral activation patterns between bipolar I disorder patients with (BW) and without (BO) hypersexuality.
• To examine how external emotional stimuli affect visual event-related potentials (ERPs) in BW and BO patients.
• To correlate electrophysiological findings with concurrent affective states.

Main Methods:

• Utilized visual oddball event-related potentials (ERPs) in 54 healthy volunteers, 27 BW patients, and 26 BO patients.
• Presented external emotion stimuli: Disgust, Erotica, Fear, Happiness, Neutral, and Sadness.
• Assessed concurrent states of mania, hypomania, and depression.

Main Results:

• BW patients exhibited prolonged N1 latencies (Erotica, Happiness) and decreased P3b amplitudes (Fear, Sadness), with distinct brain activations.
• BO patients showed increased P3b amplitudes (Fear) and different activation patterns.
• ERP components correlated with affective states, indicating impaired primary perception and voluntary attention in BW, and attention deficits in BO.

Conclusions:

• Bipolar I disorder with hypersexuality (BW) and without (BO) display unique patterns of visual attentional deficits.
• Emotional stimuli differentially impact neural processing in BW and BO patients.
• Findings highlight distinct neurocognitive profiles related to emotional processing in bipolar I disorder subtypes.