TY - JOUR
T1 - The neural correlates of anhedonia in major depressive disorder
AU - Keedwell, P A
AU - Andrew, C
AU - Williams, S C R
AU - Brammer, M J
AU - Phillips, M L
PY - 2005/12/1
Y1 - 2005/12/1
N2 - Background: Anhedonia is a relative lack of pleasure in response to formerly rewarding stimuli. It is an important diagnostic feature of major depressive disorder (MDD), and predicts antidepressant efficacy. Understanding its neurobiological basis may help to target new treatments and predict treatmentoutcomes. Using a novel paradigm, we aimed to explore the correlations between anhedonia severity and magnitude of neural responses to happy and sad stimuli in regions previously implicated in studies of human reward processing and depressive anhedonia. Methods: Neural responses to happy and sad emotional stimuli (autobiographical prompts and mood congruent facial expressions) were measured using blood oxygen level dependent (BOLD) functional magnetic resonances imaging in twelve MDD individuals with varying degrees of anhedonia. Results: In response to happy stimuli, anhedonia, but not depression severity per se, was positively and negatively correlated with vantromedial prefrontal cortex (VMPFC) and amygdala/ventral striatal activity, respectively. State anxiety independently contributed to a VMPFC-subcorticol dissociation of response to happy (but not sad) stimuli, which was similar, but different, to anhedonia. Conclusions: These findings suggest that anhedonia and state anxiety are associated with dysfunction within neural systems underlying the response ti, and assessment of, the rewarding potential of emotive stimuli in MDD, and highlight the importance of employing a symptom-dimension-based approach in the examination of the neurobiology of depression
AB - Background: Anhedonia is a relative lack of pleasure in response to formerly rewarding stimuli. It is an important diagnostic feature of major depressive disorder (MDD), and predicts antidepressant efficacy. Understanding its neurobiological basis may help to target new treatments and predict treatmentoutcomes. Using a novel paradigm, we aimed to explore the correlations between anhedonia severity and magnitude of neural responses to happy and sad stimuli in regions previously implicated in studies of human reward processing and depressive anhedonia. Methods: Neural responses to happy and sad emotional stimuli (autobiographical prompts and mood congruent facial expressions) were measured using blood oxygen level dependent (BOLD) functional magnetic resonances imaging in twelve MDD individuals with varying degrees of anhedonia. Results: In response to happy stimuli, anhedonia, but not depression severity per se, was positively and negatively correlated with vantromedial prefrontal cortex (VMPFC) and amygdala/ventral striatal activity, respectively. State anxiety independently contributed to a VMPFC-subcorticol dissociation of response to happy (but not sad) stimuli, which was similar, but different, to anhedonia. Conclusions: These findings suggest that anhedonia and state anxiety are associated with dysfunction within neural systems underlying the response ti, and assessment of, the rewarding potential of emotive stimuli in MDD, and highlight the importance of employing a symptom-dimension-based approach in the examination of the neurobiology of depression
U2 - 10.1016/j.biopsych.2005.05.019
DO - 10.1016/j.biopsych.2005.05.019
M3 - Article
SN - 1873-2402
VL - 58
SP - 843
EP - 853
JO - Biological psychiatry
JF - Biological psychiatry
IS - 11
ER -