Table 1.

Experimental groups

Groups	Number of rats	Treatments
Naïve	66	None
Hydrocortisone normal treatment	96	Hydrocortisone 0.75 to 3,0 mg/kg
Injury control	227	Anesthesia, surgical procedure, fluid percussion injury and equal volume of saline
Low-dose methylprednisolone treatment	185	Anesthesia, surgical procedure, fluid percussion injury and 0.25 to 1.0 mg/kg methylprednisolone
Stress-dose hydrocortisone treatment	120	Anesthesia, surgical procedure, fluid percussion injury and 0.75 to 3.0 mg/kg hydrocortisone