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Background:Paralysis following injury may be caused by compression of language or motion center in dominant hemisphere by edema,hematoma or brain contusion after.Commonly,injury of center of language and motion is incomplete.A number of basic research indicated that most of neurons located in range around injury lost their function due to blood supply reduction,or contact interruption and impulse reduction from pathological changes in language and motion center due to distal effect.These neurons are silent electrically,but they still maintain normal iron balance and structural integrity.If ischemic penumbra can be improved in blood supply,or silent neurons associated with language and motion located in range around injury can be invoked and corrected then early rehabilitation is available. rn