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The Cerebellum 

The Cerebellum
Chapter:
The Cerebellum
Author(s):

Per Brodal

DOI:
10.1093/med/9780190228958.003.0024
Page of

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date: 04 March 2021

Chapter 24 deals with the structure and functions of the cerebellum. It can be subdivided in three main parts based on connections: the vestibulocerebellum, spinocerebellum, and cerebrocerebellum. Each of these divisions consists of numerous small modules. The cerebrocerebellum receives afferents from the cerebral cortex via the pontine nuclei and comprise about 90% of the human cerebellum. The spinocerebellum receives afferents from the spinal cord and act back by way of reticulospinal and vestibulospinal pathways. The cerebellar cortex is highly uniform. The GABAergic Purkinje cells project to the cerebellar nuclei, which distribute signals to the thalamus, brain stem, and spinal cord. Damage to the cerebellum produces symptoms dominated by incoordination. Among several possibilities, the cerebellum may be specially designed for accurate timing of events, not only for movements but also for certain cognitive tasks carried out by the cerebral cortex. Further, the cerebellum is involved in aspects of motor learning.

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