In experimental group, transorbital electrocoagulation was carried out to occlude the right middle cerebral artery. For control group, operation was performed only to expose the right middle cerebral artery, and not to occlude it.

• 实验组经眶内入路电凝右侧大脑中动脉,对照组仅暴露 同侧大脑中动脉,不予电凝。