rsal thalami 皮质|脑桥|小脑红核|脊髓通路 Corticopontine trac Red nucleus Pontine nucleus Pontocerebellar fibers Cerebellar cortex Rubrospinal tract Spinocerebellar tract Motor cells ot anterior horn Fig. M-3-10 The extrapyramidal system( corticoponto-cerebellar-cortex circuit)皮质— 脑桥— 小脑— 红核— 脊髓通路