In this study our purpose is to evaluate the safety of intraventricular injection of bone marrow derived mesenchymal stem cell.the patients who are eligible,underwent bone marrow aspiration.after cell separation and preparation,the patients underwent mesenchymal stem cell intraventricular injection by stereotaxis.after injection he will be under observed in ICU to monitor the adverse events(allergic and neurological side effects).patients are followed 1th,3th ,6th and 12 months after injection and each time these parameters are checked:ALS-FRS,EMG-NCV,FVC,side effect check list.
