Christian Keicher

Ketamine’s impact on rumination-related brain dynamics: insights from a randomized controlled fMRI trial

Abstract Rumination has been associated with aberrant dynamics of a coactivation pattern (CAP) comprising the default mode (DMN) and frontoparietal (FPN) networks. Ketamine exerts rapid antidepressant effects and may influence these dynamics via glutamatergic mechanisms. In a ran...

Dopaminergic modulation of social reward anticipation in depression: neural effects of amisulpride versus placebo

Abstract Reward processing deficits are a well-established mechanism underlying anhedonia, a core symptom of Major Depressive Disorder (MDD). Given the role of dopamine in mesocorticolimbic reward pathways, this study examined whether a single low dose of amisulpride (100 mg), wh...