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The hippocampus consists of anatomically and functionally distinct subfields that may be differentially involved in the pathophysiology of bipolar disorder (BD). Here we, the Enhancing NeuroImaging Genetics through Meta-Analysis Bipolar Disorder workinggroup, study hippocampal subfield volumetry in BD. T1-weighted magnetic resonance imaging scans from 4,698 individuals (BD = 1,472, healthy controls [HC] = 3,226) from 23 sites worldwide were processed with FreeSurfer. We used linear mixed-effects models and mega-analysis to investigate differences in hippocampal subfield volumes between BD and HC, followed by analyses of clinical characteristics and medication use. BD showed significantly smaller volumes of the whole hippocampus (Cohen's d = -0.20), cornu ammonis (CA)1 (d = -0.18), CA2/3 (d = -0.11), CA4 (d = -0.19), molecular layer (d = -0.21), granule cell layer of dentate gyrus (d = -0.21), hippocampal tail (d = -0.10), subiculum (d = -0.15), presubiculum (d = -0.18), and hippocampal amygdala transition area (d = -0.17) compared to HC. Lithium users did not show volume differences compared to HC, while non-users did. Antipsychotics or antiepileptic use was associated with smaller volumes. In this largest study of hippocampal subfields in BD to date, we show widespread reductions in nine of 12 subfields studied. The associations were modulated by medication use and specifically the lack of differences between lithium users and HC supports a possible protective role of lithium in BD., (© 2020 The Authors. Human Brain Mapping published by Wiley Periodicals LLC.)

MRI-derived brain measures offer a link between genes, the environment and behavior and have been widely studied in bipolar disorder (BD). However, many neuroimaging studies of BD have been underpowered, leading to varied results and uncertainty regarding effects. The Enhancing Neuro Imaging Genetics through Meta-Analysis (ENIGMA) Bipolar Disorder Working Group was formed in 2012 to empower discoveries, generate consensus findings and inform future hypothesis-driven studies of BD. Through this effort, over 150 researchers from 20 countries and 55 institutions pool data and resources to produce the largest neuroimaging studies of BD ever conducted. The ENIGMA Bipolar Disorder Working Group applies standardized processing and analysis techniques to empower large-scale meta- and mega-analyses of multimodal brain MRI and improve the replicability of studies relating brain variation to clinical and genetic data. Initial BD Working Group studies reveal widespread patterns of lower cortical thickness, subcortical volume and disrupted white matter integrity associated with BD. Findings also include mapping brain alterations of common medications like lithium, symptom patterns and clinical risk profiles and have provided further insights into the pathophysiological mechanisms of BD. Here we discuss key findings from the BD working group, its ongoing projects and future directions for large-scale, collaborative studies of mental illness., (© 2020 The Authors. Human Brain Mapping published by Wiley Periodicals LLC.)

Background: Self-management appears to be a promising approach in the case of depression, which helps to stimulate patients' autonomy. However, a good and systematic description of the concept self-management from the patients' perspective, to our knowledge, has not yet been performed., Objective: To determine: (i) what strategies patients think they can use themselves to recover from depression, (ii) which main themes of self-management strategies can be detected, and (iii) which of these strategies patients perceive as being most helpful., Methods: We used concept mapping to explore the experiences of patients who recently recovered from a depressive episode. Patients generated self-management strategies in focus group discussions. The strategies were clustered on a two-dimensional concept map by a hierarchical cluster analysis., Results: Patients generated 50 strategies that formed eight clusters: (i) proactive attitude towards depression and treatment, (ii) daily life strategies and rules, (iii) explanation of disease to others, (iv) remaining socially engaged, (v) engaging in activities, (vi) structured attention to oneself, (vii) contact with fellow sufferers, and (viii) other. Behavioural and cognitive strategies and a proactive attitude towards treatment were considered as the most helpful., Discussion and Conclusion: From the patients' perspective, there is a wide range of self-management strategies that they can use - and perceive as helpful- to contribute to their own recovery. Professionals could encourage patients to take an active role in achieving recovery. Further research could open new roads to improve patients' active contributions to current treatments for depression., (© 2013 John Wiley & Sons Ltd.)