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Cortex. Primary motor. Basal nuclei: Caudate nucleus. N. Globus pallidus. Thalamus. FORE. O. Tectum. Red nucleus. Descending Reticular Formation. decuss. -. MID. Cerebellum. Vestibular nucleus. Pontine RF. Olivary nucleus. PYRAMIDS. Pontine nuclei. Medullary RF. decuss.
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Cortex Primary motor Basal nuclei: Caudate nucleus N Globus pallidus Thalamus FORE O Tectum Red nucleus Descending Reticular Formation decuss - MID Cerebellum Vestibular nucleus Pontine RF Olivary nucleus PYRAMIDS Pontine nuclei Medullary RF decuss decuss HIND decuss Vestibulospinal tract Corticospinal tract Reticulospinal tracts Rubrospinal tract Spinocerebellar tracts + - ++ + - - Extensor activation Contralateral LMNs Ipsilateral LMNs 2012 Martin Cake / Murdoch University. Shared under Creative Commons Licence (CC BY-NC-SA 3.0) for the OVAM (Online Veterinary Anatomy Museum) project
Postural phase + Anti-gravity extensors - Flexors Protraction phase + Flexors - Extensors UMN MedullaryReticulospinal Rubrospinal Pontine Reticulospinal Vestibulospinal ‘Central Pattern Generator’ Interneurons LMN Spinal reflex arcs alpha neurons (muscle spindle) gamma neurons (fusimotor) MUSCLE CONTRACTION 2012 Martin Cake / Murdoch University. Shared under Creative Commons Licence (CC BY-NC-SA 3.0) for the OVAM (Online Veterinary Anatomy Museum) project