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Conscious and Non-conscious Representations of Emotional Faces in Asperger's Syndrome

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Late positive potentials in affective picture processing during adolescence.

Wenhai Zhang¹, Jiamei Lu, Hailin Fang

¹Mental Health Center, Yancheng Institute of Technology, Yancheng, China. zwh2007106@126.com

Neuroscience Letters

|January 25, 2012

Summary

Adolescents show similar responses to emotional images as adults, with larger late positive potential (LPP) amplitudes for affective pictures. LPP brain activity increases with age during adolescence, indicating developmental changes in attention.

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Area of Science:

Neuroscience
Developmental Psychology
Cognitive Science

Background:

Previous research indicates that the late positive potential (LPP) in adults is influenced by emotional stimuli.
The LPP is a neural marker associated with attention and emotional processing.

Purpose of the Study:

To investigate if affective modulation of the LPP changes during adolescent development.
To examine the relationship between age and LPP responses to affective pictures in adolescents.

Main Methods:

Event-related potentials (ERPs) were recorded from 50 adolescents aged 11-17 years.
Participants viewed 90 pictures from the Chinese affective picture system, varying in emotional valence and arousal.
LPP amplitudes were analyzed over centroparietal sensors.

Main Results:

Affective pictures elicited significantly larger LPP amplitudes compared to neutral pictures, replicating adult findings.
LPP amplitudes increased with age across all participants, irrespective of picture valence.
These findings suggest a developmental trajectory in the processing of affective stimuli during adolescence.

Conclusions:

Adolescents exhibit affective modulation of LPP similar to adults.
Automatic attention to affective stimuli undergoes developmental changes throughout adolescence.
Age-related increases in LPP suggest a maturing attentional system for emotional information.