Study of 92 People Links Childhood Trauma to Anhedonia via Hippocampal-Mesolimbic Dysfunction
Updated
Updated · jneurosci.org · Aug 6
Study of 92 People Links Childhood Trauma to Anhedonia via Hippocampal-Mesolimbic Dysfunction
1 articles · Updated · jneurosci.org · Aug 6
Summary
In 92 participants, researchers found childhood trauma amplified the link between disrupted hippocampal-mesolimbic function and anticipatory anhedonia—the reduced ability to expect and pursue rewards.
fMRI measures showed three separate markers tracked that effect in high-trauma individuals: weaker hippocampus-nucleus accumbens connectivity, lower hippocampal novelty response, and weaker hippocampal modulation of ventral tegmental area activity.
LASSO regression identified those trauma-by-circuit interactions as unique predictors, suggesting the neural changes were not redundant signals.
The findings shift attention beyond the striatum alone, pointing to the hippocampus as an upstream contributor to motivation deficits and to early-life stress as the context that makes mesolimbic dysfunction behaviorally relevant.