Transverse section of spinal cord showing the lower motor neurons in ventral horn of spinal cord at the level of T12-L1 of all groups which were evaluated in this study on Day 56. H&E staining showing shrinkage and reduction in ventral horn motor neurons in SCI group in comparison with SCI-MO, SCI-hUCBSC, and SCI-hUCBSC-MO groups. Black arrows illustrate the ventral horn motor neurons (400×). a = SCI, b = SCI-hUCBSC, c = SCI-MO, d = SCI-MO-hUCBSC. Note. H&E = hematoxylin and eosin; hUCBSC = human umbilical cord blood stem cell; MO = Melissa officinalis; SCI = spinal cord injury.