Journal
COMMUNICATIONS BIOLOGY
Volume 5, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s42003-022-03463-0
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Funding
- Science and Technology Program of Guangdong [2018B030334001]
- University of Hong Kong May Endowed Professorship in Neuropsychology
- Ministry of Science and Technology of China [2019YFA0707103]
- National Nature Science Foundation of China [31730039]
- Strategic Priority Research Program of Chinese Academy of Science [XDB32010300]
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A study on patients with major depressive disorder suggests that there is a dysfunctional connection between the amygdala and pons in people with depression, which is related to the severity of depression. Understanding the neural mechanisms of sad mood in depression can aid in mood regulation and treatment.
A study on patients with major depressive disorder (MDD) suggests that a specific sadness-processing connection between the amygdala and pons appears to be dysfunctional among people with MDD and associated with severity of depression. Knowledge of the neural underpinnings of processing sad information and how it differs in people with depression could elucidate the neural mechanisms perpetuating sad mood in depression. Here, we conduct a 7 T fMRI study to delineate the neural correlates involved only in processing sad information, including pons, amygdala, and corticolimbic regions. We then conduct a 3 T fMRI study to examine the resting-state connectivity in another sample of people with and without depression. Only clinically depressed people demonstrate hyperactive amygdala-pons connectivity. Furthermore, this connectivity is related to depression symptom severity and is a significant indicator of depression. We speculate that visual sad information reinforces depressed mood and stimulates the pons, strengthening the amygdala-pons connectivity. The relationship between this connectivity and depressive symptom severity suggests that guiding one's visual attention and processing of sad information may benefit mood regulation.
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