
TL;DR: A 2026 iScience study recorded human substantia nigra neurons during Parkinson’s surgery and found that putative dopamine-neuron firing was higher after a prior reward, while the next response was modestly faster. Key Findings Direct human recordings: R…
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Counterfactual Curiosity Lit Up the Striatum TL;DR: People paid a waiting cost to reveal a missed payoff in a balloon task, and reward-related striatum activity tracked both the choice to know and the size of the missed opportunity. Key Findings Functional MRI…
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Ketamine Restored Reward Bias Across Species TL;DR: Ketamine restored reward-learning bias in both treatment-resistant depression and chronically stressed rats while leaving basic discrimination unchanged. Key Findings Reward bias increased: Ketamine significa…
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