Surgical Procedure

	Anesthetize a monkey and fix the head on stereotaxic. Attach all of electrode for monitoring vital signal during surgery. Disinfect all of surgical area and cover the area with sterilized drapes.
	Incise a skin with a cautery knife. The galea aponeurotica is cut at the center and gently peeled off from skull with the knife.
	The galea aponeurotica and temporal muscle are removed from skull with scraper until all of surgical area is exposed. Tissues on skull surface have to be wiped out and all of bleeding has to be completely stopped.
	Edge of the skin and the muscles are wrapped with moisten gauze. The gauze has to be moisten during the surgery.Traction sutures are put at skin edge under the gauze and the suture is pulled out to ensure a sufficient working space. Drawing a planned area of craniotomy on the skull with a pencil. Circle is where bar hole will be put and lines are where craniotome will cut the skull.
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