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What are the primary inputs and outputs of the cerebellum?
Cerebellar function can be conceptualized as a feedback loop, with input arriving from an origin, synapsing in a cerebellar nucleus, and then projecting back, often to the same origin.
Cerebellar Connections
| Cerebellar Peduncle | Connected to | Tracts That Run in the Peduncle |
|---|---|---|
| Superior (SCP) | Midbrain | DRT and VSC |
| Middle (MCP) | Pons | CPC |
| Inferior (ICP) | Medulla | All other tracts to/from the cerebellum |
| Origin | Inflow Tract | Inflow Peduncle | Cerebellar Nucleus | Outflow Peduncle | Outflow Tract | Destination |
|---|---|---|---|---|---|---|
| Precentral gyrus | CPC | MCP | Dentate | SCP | DRT | Precentral gyrus |
| Spinal cord | SC | ICP | Fastigial | ICP | — | Vestibular nucleus |
| Vestibular nucleus | VC | ICP | Vestibular | ICP | LVS (MLF) | Spinal cord |
SCP, Superior cerebellar peduncle; MCP, middle cerebellar peduncle; ICP, inferior cerebellar peduncle; DRT, dentatorubrothalamic; VSC, ventral spinocerebellar; CPC, corticopontocerebellar; SC, spinocerebellar; VC, vestibulocerebellar; LVS, lateral vestibulospinal; MLF, medial longitudinal fasciculus.
