Details:
The process in which the migration of an axon growth cone of a pyramidal cell that is part of the corticospinal tract is directed after decussation through the spinal cord in response to a combination of attractive and repulsive cues. [GO_REF:0000021, GOC:cls, GOC:dgh, GOC:dph, GOC:jid, GOC:mtg_15jun06, PMID:9878731]