Gavage propolis (200-mg/kg body weight/d/28 d)  Adult female Wistar rats undergoing crush injuries of the sciatic nerve  EG: propolisCG1: curcuminCG2: methylprednisoloneCG3: sham ratsCG4: untreated rats with sciatic nerve injury  Gastrocnemius muscle mass, motor function, nerve fiber myelination, and nerve conduction.  Propolis and curcumin significantly restored gastrocnemius muscle mass, improved walking, nerve fiber myelination, and motor conduction to the gastrocnemius muscle compared with CG4.  [113]