How does a person lose his memory?

Your brain contains memory centres where millions of old memories are stored away in an orderly manner according to subjects: music you have heard, places you have seen, and tastes and smells you have experienced. Because of this orderly arrangement, it is possible for one section of a person’s brain to be damaged or destroyed without harming the other sections. For example, someone may suffer a brain injury and ‘forget’ how to use words, but still be able to use numbers. Sometimes people have a memory blindness due to old age or an injury. This memory blindness may take the form of preventing them from recognizing objects they see.

They may look at a ball and may not be knowing what it is. But if they can recognize it as ball because their storehouse of ‘touch’ memory has not been damaged. Some people suffer from amnesia an inability to remember some or all of their past experiences. Amnesia can be caused by a shock, which makes a person forget things he does not want to remember, or by a physical injury to brain. Doctors can often treat amnesia from a shock by hypnosis or certain drugs. But amnesia, caused by physical injury, causes permanent damage and cannot be cured.