Auditory evoked potential could reflect emotional sensitivity and impulsivity.

Area of Science:

• Neuroscience
• Psychophysiology

Background:

• Emotional sensitivity and impulsivity are linked to interpersonal conflicts and neuropsychiatric issues.
• Serotonin plays a crucial role in regulating behavioral inhibition and impulsivity.

Purpose of the Study:

• To investigate if loudness dependence of auditory evoked potential (LDAEP), a marker of central serotonergic activity, reflects emotional sensitivity and impulsivity.
• To explore LDAEP as a potential biomarker for emotional regulation.

Main Methods:

• 157 healthy participants underwent electroencephalogram (EEG) measurement, including LDAEP and Go/Nogo paradigms.
• Psychometric assessments included the Barratt impulsivity scale (BIS), Conners' Adult ADHD rating scale (CAARS), and affective lability scale (ALS).
• Comparisons were made between low and high LDAEP groups for behavioral, psychological, and event-related potential (ERP) measures.

Main Results:

• The high LDAEP group exhibited significantly higher BIS, CAARS subscale scores, ALS scores, and false alarm rates on Nogo stimuli.
• LDAEP demonstrated significant positive correlations with depression scale scores, ALS, CAARS subscale, and Nogo-P3 amplitude.
• Increased source activity in the cuneus, lingual gyrus, and precentral gyrus was observed in the high LDAEP group during the Nogo-P3 response.

Conclusions:

• LDAEP is a potential biological marker that can reflect emotional sensitivity and impulsivity.
• This auditory evoked potential measure offers a promising tool for evaluating emotional regulation.