Amnesia is a condition in which memory is disturbed or lost. Memory in this context refers either to stored memories or to the process of committing something to memory. The causes of amnesia have traditionally been divided into the "organic" or the "functional." Organic causes may include brain damage through injury, or the use of specific drugs - usually sedative drugs. Amnesia may be one of the symptoms of some degenerative brain diseases, such as Alzheimer's disease. Functional causes are psychological factors, such as defense mechanisms. People with amnesia also find it hard to imagine the future, because our constructions of future scenarios are closely linked to our recollections of past experiences. Researchers from Washington University in St. Louis used advanced brain imaging techniques to show that remembering the past and envisioning the future may go hand-in-hand, with each process sparking strikingly similar patterns of activity within precisely the same broad network of broad region.

Hyperlipidemia, also called hypercholesterolemia or High cholesterol is the condition in which there is increase in the concentration of cholesterol and/or triglycerides carrying lipoproteins in plasma. It is the condition indicating increase in lipid level. Both these conditions may cause narrowing and hardening of the arteries, i.e.atherosclerosis. Thus hyperlipidemia is one of the leading cause of ischemic heart disease, myocardial infarction and cerebral vascular accidents. More than 650,000 people die every year of coronary heart disease (CHD) in the US alone. In 1984 it was demonstrated for the first time that there exists a link between serum cholesterol levels and risk to CHD. A 1% drop in serum cholesterol reduces the risk for CHD by 2%. Positive risk factors for CHD include Age (men35 mg/dl); obesity (