Gender effect in affective processing: Alpha EEG source analysis on emotional slides and film-clips

Area of Science:

• Neuroscience
• Cognitive Psychology
• Emotion Research

Background:

• Previous research on gender differences in emotional brain activity has yielded inconsistent results.
• Understanding these differences is crucial for comprehending human emotional processing.

Purpose of the Study:

• To investigate gender-specific patterns of electroencephalography (EEG) alpha activity in response to different types of emotional stimuli.
• To explore how stimulus modality (dynamic clips vs. static images) influences gender-related brain responses.

Main Methods:

• Electroencephalography (EEG) alpha activity was recorded from 64 scalp sites in 20 women and 20 men.
• Participants viewed blocks of emotional (erotic, fear) and neutral stimuli presented as short video clips and still images.
• Source analysis of EEG data was performed to identify regional brain activation patterns.

Main Results:

• Women rated fear stimuli as more arousing and unpleasant than men.
• Emotional video clips elicited greater right than left occipital activation in both genders.
• Emotional images revealed distinct hemispheric activation: left occipital in women, right occipital in men.
• Men showed greater posterior parietal activation to erotic than fear stimuli.

Conclusions:

• The type of emotional stimulus significantly impacts the manifestation of gender differences in brain activity.
• Dynamic, engaging stimuli like video clips may lead to more unified emotional responses, masking individual differences.
• Less engaging stimuli, such as static images, allow for the emergence of gender-specific patterns and interactions with stimulus category.