For example functional magnetic resonance imaging (fMRI), children with a history of preschool - onset depression demonstrated distinct patterns of
brain activation, which were similar to those of adults with depression.34 Other research documents that DSM - IV criteria for depression do not adequately
capture the disorder's course in preschool - aged children.35 Similar to the heightened awareness regarding preschool depression, evidence suggests that young children can also suffer from post-traumatic stress disorder when age - adjusted diagnostic criteria are employed.36