Predictive and instructive cerebellar encoding of dopamine reward drives motivated behavior.

Cerebellar input streams encode dopamine rewards with both predictive and instructive signals, influencing motivated behavior in mice.

• Why it matters: Understanding how the cerebellum contributes to reward processing fills a gap in knowledge about brain circuits driving motivation and learning, beyond its traditional role in movement coordination.
• What they did: Using two-photon imaging and behavioral training with delayed dopamine rewards, the study examined cerebellar granule cells and climbing fibers in mice, revealing their distinct encoding patterns and causal roles.
• The result: Findings show cerebellar encoding of dopamine rewards is crucial for motivated behaviors, indicating the cerebellum's deeper integration into brain reward prediction networks and its potential influence on learning.