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Psychological Functions of the Cerebellum

Brandeis University

Joseph E. Steinmetz

Indiana University

For most ofthe 20th century, the brain science community held the view that the cerebellum was exclusively involved in motor control functions. Over the past 20 years, this has largely been replaced by the idea that the cerebellum participates in a variety of motor and nonmotor functions and, importantly, may contain neurons that display longand short-term plasticity, encoding behavioral and cognitive functions. The authors present evidence for the involvement of the cerebellum in motor and nonmotor functions and further suggest that the cerebellum’s internal neural architecture and connectivity patterns with other areas ofthe brain determine the range offunctions that the cerebellum participates in. To stress the interactive nature ofthe structure, the authors suggest that the phenomena that the cerebellum encodes may be best described generally as the psychological functions ofthe cerebellum instead ofattempting to categorize all functions as either motor or nonmotor.

Key Words: cerebellum • motor function • nonmotor function • cognitive phenomena • coherence • rebound from inhibition • cerebellar cortex • deep cerebellar nuclei

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