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Descending Pathways
descending neuro tract pathways
Question | Answer |
---|---|
Rubrospinal Pathway | red nucleus > crosses immediately in midbrain > descends lateral spinal cord > ventral horn |
Lateral Corticospinal Pathway | cortex > crosses in lower medulla > descends in lateral spinal cord > anterior horn |
Tectospinal Pathway | superior colliculi > crosses immediately > descends in anteromedial spinal cord > upper spinal cord / cervical spine termination |
Anteriomedial corticospinal Pathway | cortex > descends IL (no cross) > medial ventral horn |
Medial Reticulospinal Pathway | reticular nuclei >descends IL |
Lateral Reticulospinal Pathway | reticular nuclei > descends bilaterally but IL dominates |
Medial Vestibulospinal Pathway | Desc. Bilaterally Ends in mid-upper spine |
Lateral Vestibulospinal Pathway | Desc. IL Runs down entire spine |
Corticobulbar Pathway | cortex > motor CN via anterior brainstem > bilateral innervation except CN7 and CN12 |
Medial Longitudinal Fasciculus Pathway | arises at medial vestibular nucleus > bilaterally through the brainstem > travels in the anterior white columns of the spinal cord > terminates on LMN circuit neurons of cervical and upper thoracic levels |