The neural basis of hot and cold cognition in depressed patients, unaffected relatives, and low -risk healthy controls: An fMRI investigation

JOURNAL OF AFFECTIVE DISORDERS

卷:274

Article

Nord, C. L.^1,2  Halahakoon, D. C.^1,3  Lally, N.^1,4,5  Limbachya, T.⁶  Pilling, S.⁷  Roiser, J. P.¹ 

[1] UCL, Inst Cognit Neurosci, London, England

[2] Univ Cambridge, MRC Cognit & Brain Sci Unit, 15 Chaucer Rd, Cambridge CB2 7EF, England

[3] Univ Oxford, Dept Psychiat, Oxford, England

[4] Univ Warwick, Warwick Med Sch, Coventry, W Midlands, England

[5] NIMH, Expt Therapeut & Pathophysiol Branch, Intramural Res Program, NIH, Bethesda, MD 20892 USA

[6] Camden & Islington NHS Fdn Trust, London, England

[7] UCL, Dept Clin Educ & Hlth Psychol, London, England

关键词: Depression;    DLPFC;    Amygdala;    Working memory;    Emotion processing;   

DOI  :  10.1016/j.jad.2020.05.022

来源: Elsevier

【 摘 要 】

Background: Modern cognitive neuropsychological models of depression posit that negatively biased emotional (hot ) processing confers risk for depression, while preserved executive function (cold ) cognition promotes resilience. Methods: We compared neural responses during hot and cold cognitive tasks in 99 individuals: those at familial risk for depression (N = 30 unaffected first-degree relatives of depressed individuals) and those currently ex-periencing a major depressive episode (N = 39 unmedicated depressed patients) with low-risk healthy controls (N = 30). Primary analyses assessed neural activation on two functional magnetic resonance imaging tasks previously associated with depression: dorsolateral prefrontal cortex (DLPFC) responsivity during the n-back working memory task; and amygdala and subgenual anterior cingulate cortex (sgACC) responsivity during in-cidental emotional face processing. Results: Depressed patients exhibited significantly attenuated working memory-related DLPFC activation, compared to low-risk controls and unaffected relatives; unaffected relatives did not differ from low-risk controls. We did not observe a complementary pattern during emotion processing. However, we found preliminary support that greater DLPFC activation was associated with lower amygdala response during emotion processing. Limitations: These findings require confirmation in a longitudinal study to observe each individual's risk of developing depression; without this, we cannot identify the true risk level of the first-degree relative or low-risk control group. Conclusions: These findings have implications for understanding the neural mechanisms of risk and resilience in depression: they are consistent with the suggestion that preserved executive function might confer resilience to developing depression in first-degree relatives of depressed patients.

【 授权许可】

Free