Bipolar disorder: Functional neuroimaging markers in relatives

Neuroscience and Biobehavioral Reviews
Camille PiguetJosselin Houenou

Abstract

Neural models of anatomical and functional alterations have been proposed for bipolar disorders (BD). However, studies in affected patients do not allow disentangling alterations linked to the liability to BD from those associated with the evolution, medication and comorbidities of BD. Explorations in high risk subjects allow the study of these risk markers. We reported and summarized all functional magnetic resonance imaging (fMRI) studies focusing on first-degree relatives of BD patients. We found 29 studies reporting neural correlates of working memory (WM), emotional processing, executive functions and resting state in relatives of BD patients, compared to healthy subjects. Overall, the same regions that have been involved in patients, such as the inferior frontal gyrus and limbic areas, seem to be functionally altered in high-risk subjects. We conclude that the same brain regions already implicated in the pathophysiology of the disease such as the amygdala are also associated with the risk of BD. However longitudinal studies are required to understand their implication in the transition to BD.

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Citations

Jan 3, 2019·Expert Review of Neurotherapeutics·Benedetta VaiFrancesco Benedetti
Nov 15, 2019·Bipolar Disorders·Kareen HeinzeHeather C Whalley
Nov 22, 2016·Current Treatment Options in Psychiatry·Ayşegül ÖzerdemGüneş Can

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