Rats were divided into 5 groups ; group 1 ( n = 6 ) , control group ; group 2 ( n = 6 ) , axonotmesis + placebo group ; group 3 ( n = 6 ) , axonotmesis + 50 mg/kg agmatine treatment group ; group 4 ( n = 6 ) , neurotmesis + placebo group ; group 5 ( n = 6 ) , neurotmesis + 50 mg/kg agmatine treatment group .