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Distinct neural mechanisms of emotional processing in prolonged grief disorder.
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- Author(s): Bryant, Richard A.; Andrew, Elpiniki; Korgaonkar, Mayuresh S.
- Source:
Psychological Medicine; Mar2021, Vol. 51 Issue 4, p587-595, 9p- Subject Terms:
POST-traumatic stress disorder; BRAIN physiology; AMYGDALOID body physiology; MENTAL depression; MENTAL illness; GRIEF; FRONTAL lobe; NEURAL pathways; AFFECT (Psychology); SELF-control; BASAL ganglia; MAGNETIC resonance imaging; FACIAL expression; DESCRIPTIVE statistics; EMOTION regulation; BEREAVEMENT; CEREBRAL cortex - Source:
- Additional Information
- Abstract: Background: Prolonged grief disorder (PGD) has recently been recognized as a separate psychiatric diagnosis, despite controversy over the extent to which it is distinctive from posttraumatic stress disorder (PTSD) and major depressive disorder (MDD). Methods: This study investigated distinctive neural processes underpinning emotion processing in participants with PGD, PTSD, and MDD with functional magnetic resonance study of 117 participants that included PGD (n = 21), PTSD (n = 45), MDD (n = 26), and bereaved controls (BC) (n = 25). Neural responses were measured across the brain while sad, happy, or neutral faces were presented at both supraliminal and subliminal levels. Results: PGD had greater activation in the pregenual anterior cingulate cortex (pgACC), bilateral insula, bilateral dorsolateral prefrontal cortices and right caudate and also greater pgACC–right pallidum connectivity relative to BC during subliminal processing of happy faces. PGD was distinct relative to both PTSD and MDD groups with greater recruitment of the medial orbitofrontal cortex during supraliminal processing of sad faces. PGD were also distinct relative to MDD (but not PTSD) with greater activation in the left amygdala, caudate, and putamen during subliminal presentation of sad faces. There was no distinction between PGD, PTSD, and MDD during processing of happy faces. Conclusions: These results provide initial evidence of distinct neural profiles of PGD relative to related psychopathological conditions, and highlight activation of neural regions implicated in reward networks. This pattern of findings validates current models of PGD that emphasize the roles of yearning and appetitive processes in PGD. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Psychological Medicine is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Abstract:
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