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In horizontal section, the nucleus is wedge-shaped with greatest width rostrally in the "dorsal zone" above the descending tract of cranial nerve V.
1-3] Organophosphate induced delayed neuropathy results in the functional loss of the distal parts of sensory and motor axons of peripheral nerves, and also affects the ascending and descending tracts of the spinal cord.
As noted above, loss of function after SCI is in large part due to damage to myelinated fibers in ascending and descending tracts within the spinal cord.