A pt had a glioma of lt occipital region with weakness on rt side of body. He is unable to lift rt leg & hand just since 3-4 months patient was well-prepared & pt was fit for surgery. All Anaesthesia investigations were within normal limits.The size of the glioma was well-marked on the scalp with vit A capsules.

What is the procedure in detail? When you will awake the patient and why? Please answer in detail.