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Related to motor tract: pyramidal motor system, Pyramidal Tracts
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The most likely explanation for the initial AFP reports was difficulty in distinguishing flaccid or lower motor neuron weakness due to peripheral nervous system pathology (i.e., pathology at or distal to the anterior horn cells) from spastic or upper motor neuron weakness due to central nervous system pathology (i.e., pathology in the spinal cord or brain motor tracts).
Different studies have focused on the safety of the tractography guided surgery of tumors near the motor tract, based on lower postoperative morbidity mainly when associated with intraoperative brain stimulation [2,11,16,17,18,25].
The optic nerve, like the corticospinal tract (or primary motor tract) within the spinal cord, consists only of mytelinated fibers and thus provides a tractable system in which secondary injury of white matter can be readily studied.