A differential pattern of neural response toward sad versus happy facial expressions in major depressive disorder.
BACKGROUND
Accurate recognition of facial expressions is crucial for social functioning. In depressed individuals, implicit and explicit attentional biases away from happy and toward sad stimuli have been demonstrated. These may be associated with the negative cognitions in these individuals.


METHODS
Using event-related functional magnetic resonance imaging (fMRI), neural responses to happy and sad facial expressions were measured in 14 healthy individuals and 16 individuals with major depressive disorder.


RESULTS
Healthy but not depressed individuals demonstrated linear increases in response in bilateral fusiform gyri and right putamen to expressions of increasing happiness, while depressed individuals demonstrated linear increases in response in left putamen, left parahippocampal gyrus/amygdala, and right fusiform gyrus to expressions of increasing sadness. There was a negative correlation in depressed individuals between depression severity and magnitude of neural response within right fusiform gyrus to happy expressions.


CONCLUSIONS
Our findings indicate preferential increases in neural response to sad but not happy facial expressions in neural regions involved in the processing of emotional stimuli in depressed individuals. These findings may be associated with the above pattern of implicit and explicit attentional biases in these individuals and suggest a potential neural basis for the negative cognitions and social dysfunction in major depression.
Surguladze
Simon
S
Institute of Psychiatry, King's College London, London. s.surguladze@iop.kcl.ac.uk
Brammer
Michael J
MJ
Keedwell
Paul
P
Giampietro
Vincent
V
Young
Andrew W
AW
Travis
Michael J
MJ
Williams
Steven C R
SC
Phillips
Mary L
ML
D000328:Adult; D001931:Brain Mapping; D016022:Case-Control Studies; D003865:Major Depressive Disorder / Q000503:physiopathology*; D004644:Emotions / Q000502:physiology*; D005149:Facial Expression; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006179:Gyrus Cinguli / Q000098:blood supply / Q000503:physiopathology*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D016014:Linear Models; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood; D010364:Pattern Recognition, Visual / Q000502:physiology; D011699:Putamen / Q000098:blood supply / Q000503:physiopathology*; D013997:Time Factors
D010100:Oxygen