Visual depiction (magnification, ×200) of TC labeling on the periosteal surface of cortical bone at the tibia diaphysis. (A) SN+non-EMS; (B) SN+EMS; and (C) BC. Of note is the smaller flurochrome labeling width in the SN+non-EMS group. SN+EMS and BC have similar large interlabel width. SN, sciatic neurectomy; EMS, electrical muscle stimulation; BC, blank control; TC, tetracycline.