Spinoreticular tract → Reticular formation
flexion: Red nucleus → Rubrospinal tract
extension: Vestibulocerebellum → Vestibular nuclei → Vestibulospinal tract
extension: Vestibulocerebellum → Reticular formation → Reticulospinal tract
Vestibular nucleus → Vestibulocerebellar tract → Cerebellum
Pontine nuclei → Pontocerebellar fibers → Deep cerebellar nuclei
Inferior olivary nucleus → Olivocerebellar tract → Cerebellar hemisphere
Primary motor cortex → Genu of internal capsule → Corticobulbar tract → brainstem