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Descending Pathways

descending neuro tract pathways

QuestionAnswer
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
Created by: wrenlette