Beyond movement, the cerebellum may contribute to the anticipation of rewards
Over the course of their lives, humans and other animals can learn to connect specific actions or cues to a desirable outcome. This process, called reward learning, is known to play a role in some mental health conditions, particularly substance use disorders (SUDs).
Recent research published in Nature Neuroscience suggests the cerebellum, a brain region known primarily for movement control, may also play a role in reward anticipation. Scientists at the National Institutes of Health and Brown University studied mice to explore this connection. The study found that anticipating dopamine-based rewards activated specific cerebellar cells.
Longer waits for these rewards resulted in sustained activity in these cells. Silencing these cells during the waiting period hindered learning, while activating the climbing fibers after a push reinforced the behavior. This indicates the cerebellum contributes to reward learning and execution, potentially impacting conditions involving compulsive reward-seeking like gambling or drug addiction.
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