Spinospinal columns are collections of fibers, ascending, descending, crossed and uncrossed, that connect various levels of the spinal cord and are located between the spinal central gray and the long tracts that surround it. They are subdivided into anterior intersegmental tract of the spinal cord, lateral intersegmental tract of the spinal cord and posterior intersegmental tract of the spinal cord.
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Spinospinal columns Wikipedia(Text) CC BY-SA