Postoperative changes in spinal levels of GABA synthesizing enzymes, GAD65 and GAD67. Data are expressed as percentage of naïve animals. POD indicates postoperative day. When compared with naïve animals, significant loss of spinal GAD65 or GAD67 was observed in neither ipsilateral nor contralateral side of both of the allodynic and non-allodynic groups at any postoperative day