Cerebellum

Always and completely ipsilateral

Vestibulocerebellum (Archicerebellum) - Flocculonodular lobe, part of vermis. Balance and eye movements

• Spinocerebellum (Paleocerebellum) - Lateral decending motor execution
• Vermis - Medial decending motor execution
• Cerebrocerebellum (Neocerebellum) - motor planning

• Spinocerebellar tracts enter via ICP
• Olivocerebellar afferents from contralateral olivary nucleus via ICP
• Pontocerebellar afferents from contralateral potine nucleus via MCP
• Outputs through SCP decussation

• Crosses over mid-line as fibres have already decussated before reaching cerebellum