Motor syste1 - o Function: Turns head toward sights or...

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Motor system: organisation and disorders Divisions between UMNs and LMNs Division between upper & lower motorneurones, pyramidal & extrapyramidal pathways, & which tracts comprise which Pyramidal Motor Pathways: Lateral corticospinal tract o Function: Voluntary movement o o Decussation: Medulla (pyramidal decussation) o Termination: Contralateral spinal cord ventral horn Ventral corticospinal tract o Function: Voluntary movement o o Decussation: Spinal cord o Termination: Contralateral spinal cord ventral horn Corticobulbar tract o Function: Voluntary movement o o Decussation: Brainstem o Termination: Contralateral motor cranial nerve nuclei Extrapyramidal Motor Pathways: Tectospinal tract
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Unformatted text preview: o Function: Turns head toward sights or sounds o Origin: Tectum (colliculi) of brain o Decussation: Brainstem o Termination: Cervical & upper thoracic spinal cord Rubrospinal tract o Function: Flexor muscle tone o Origin: Red nucleus o Decussation: Brainstem o Termination: Cervical & upper thoracic spinal cord Reticulospinal tract o Function: Automatic movement, e.g. locomotion o Origin: Reticular formation o Decussation: Brainstem (partial) o Termination: Spinal cord Vestibulospinal tract o Function: Balance & posture o Origin: Vestibular nucleus o Decussation: None o Termination: Spinal cord Olivospinal tract o Function: Automatic movements of head, neck & upper limb o Origin: Inferior olivary nucleus o Decussation: Brainstem o Termination: Cervical spinal cord...
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This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

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Motor syste1 - o Function: Turns head toward sights or...

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