Amnesia "disorder in which the major symptom is a problem with memory; either the individual can,t recall previously learned things or can,t put new information into memory." causes there are many causes of amnesia some are as following, electric shock. an injury to brain. tumor in the brain. intoxication or drug abuse. during surgery waste of brain cells. severe shock to brain. The most common types of amnesia are: Anterograde amnesia: A person with anterograde amnesia cannot remember new information. This usually results from brain trauma, such as a blow to the head that causes brain damage. The person will have their full memory from the time before the injury. Retrograde amnesia: In some ways the opposite of anterograde amnesia, retrograde amnesia is when a person cannot remember events that occurred before their trauma, but they can remember what happened after it. In rare cases, both retrograde and anterogra