Depression

Effort-Reward Computation in Depression: Why Your Brain Decides Nothing Is Worth Doing Antidepressants often fail at restoring motivation because the mood circuit and the effort-reward computation circuit are architecturally distinct. SSRIs lift the emotional weight; the ventral striatum, anterior cingulate cortex, and dorsolateral prefrontal cortex continue to overestimate effort and undervalue anticipated reward. Mood improves. Initiation does not. The veto sits in a different system entirely. ...

Inflammatory Depression: How Cytokines Shut Down Your Brain’s Drive Architecture Inflammatory depression is a distinct neurobiological subtype in which chronic peripheral inflammation — elevated IL-6, TNF-alpha, and CRP — penetrates the blood-brain barrier and suppresses dopaminergic transmission in the VTA-to-ventral-striatum circuit. It produces fatigue, brain fog, and flatlined drive even when standard serotonergic strategies partially lift mood. ...

Why Your Brain Actively Blocks Motivation: The Habenula and Anti-Reward Signaling in Depression Depression kills motivation because your brain runs a circuit that actively blocks it. The lateral habenula — a small structure behind the thalamus — fires tonically in persistent depression, releasing GABA onto VTA dopaminergic neurons and suppressing the approach signal before effort can begin. ...