<prompt> A woman with major depressive disorder underwent electroconvulsive therapy ECT. Which of the following increases on ECT?5-hydroxyindoleacetic acidDopamineSerotoninBrain derived neurotrophic factor  <response>: Electroconvulsive therapy ECT also increases the expression of brain-derived neurotrophic factor and its receptor tyrosine kinase receptor B in hippocampus and dentate gyrus, a process associated with neurogenesis and increased neural plasticity. Ref: Principles and Practice of Psychopharmacotherapy By Philip G. Janicak, M.D., Stephen R. Marder, M.D., Mani N. Pavuluri, 2011, Page 317. 