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Right brain damage impairs recognition of negative emotions
M K Mandal1, S C Tandon, H S Asthana
1Department of Psychology, Banaras Hindu University, Varanasi, India.
Summary
This study shows that normal individuals are best at recognizing facial emotions. Left hemisphere damage impairs emotion recognition more than right hemisphere damage, especially for negative emotions.
Area of Science:
- Neuroscience
- Psychology
- Cognitive Science
Background:
- Facial emotion recognition is crucial for social interaction.
- Hemispheric lateralization of brain function suggests potential differences in processing emotional cues.
Purpose of the Study:
- To investigate the impact of unilateral brain damage on facial emotion recognition.
- To compare the performance of patients with right hemisphere damage (RHD) and left hemisphere damage (LHD) against normal controls.
Main Methods:
- Participants (normal controls, LHD, RHD) judged facial emotions from upright and inverted photographs.
- Two tasks were used: a matching task and a verbal labeling task.
Main Results:
- Normal controls significantly outperformed LHD patients, who in turn outperformed RHD patients in emotion judgment.
- LHD patients showed significantly better recognition of negative-aroused and negative-nonaroused emotions compared to RHD patients.
- No significant difference in recognizing positive emotions was found between LHD and RHD patients.
Conclusions:
- Hemispheric lateralization plays a significant role in facial emotion recognition.
- Left hemisphere damage has a more pronounced effect on the recognition of negative facial emotions than right hemisphere damage.