these data indicate that constipation in patients with paraplegia is due to abnormal transit , mainly at the level of the left colon and rectum , and transection of the spine between the c-4 and t-12 vertebral levels causes alteration of large-bowel motor activity mainly at the level of the segments innervated by the parasympathetic fibers of the sacral outflow .
C0037949
spine
C0036037
sacral