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Abstract #1347

ECT-INDUCED STRUCTURAL CHANGES IN THE HUMAN BRAIN; A CASE SERIES

Leif Oltedal 1,2 , Ute Kessler 1,3 , Nathan S White 4 , Hauke Bartsch 5 , Bjarne Hansen 3 , Lars Ersland 6 , Renate Grner 2 , Joshua Kuperman 4 , Dominic Holland 7 , Kenneth Hugdahl 3,8 , Ketil J degaard 1,3 , and Anders M Dale 4,5

1 Department of Clinical Medicine, University of Bergen, Bergen, Norway, 2 Department of Radiology, Haukeland University Hospital, Bergen, Norway, 3 Division of Psychiatry, Haukeland University Hospital, Bergen, Norway, 4 Department of Radiology, University of California, San Diego, California, United States, 5 Multi-Modal Imaging Laboratory, University of California, San Diego, California, United States, 6 Department of Clinical Engineering, Haukeland University Hospital, Bergen, Norway, 7 Department of Neurosciences, University of California, San Diego, California, United States, 8 Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway

Electroconvulsive therapy (ECT) is by many clinicians regarded as the most effective acute treatment of major depressive disorder. At the group level, ECT has been shown to induce structural changes in the hippocampus, supporting a neurotrophic hypothesis. Here we demonstrate that ECT-induced structural changes may be appreciated at the level of the individual patient after appropriate preprocessing and co-registration of longitudinal intra-individual images. At the group level (n=6; 3D T1 volumes at 3 time points) quantification with FreeSurfer and Quarc, suggests structural changes in various ROIs in the subcortical gray matter, in addition to the hippocampus.

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