Dr. K K Aggarwal, President Heart Care Foundation of India and Group Editor in Chief MEDtalks, will discuss about the investigations related to cognitive function in this video. There are five tests to diagnose cognitive function. Immediate memory – while talking suddenly divert the patient, the patient will forget about the talking. In this, there can be impairment of naming objects or names. Also ask about calculation, they might forget the calculation. Ask for near or far distinguishing object. Also, patient with cognitive impairment cannot reason out and might have impaired language.