The Institute of Neurological Science, one of the eminent medical insitutes of Guwahati has exhibited unprecedented success in the field of medical treatment with the successful operations of risky brian disease 'cerebral anerusym' during the last few day.Addressing a press conference at the institute senior neurologists Dr A Chakravarty and Dr N Baruah said that with the help of New Digital Substraction Angiography launched to function successfully at Institute of neurological science and lots of patients who sufferred from the aforsaid brain disease had benefited from it.