Amnesia Disease and it Cause

 Amnesia is a memory deficit  caused by brain injury or disease, but it can also be caused temporarily by the use of various sedatives and hypnotics. The memory may be totally or partially lost due to the extent of the damage caused. There are two main types of amnesia: retrograde amnesia and anterograde amnesia. Retrograde amnesia is the inability to retrieve information  acquired before a given date, usually the date of an accident or operation. In some cases the memory loss can go back decades, while in others the person may only lose  a few months of memory. Anterograde amnesia is the inability to transfer new information from the short-term record to the long-term record. People with anterograde amnesia cannot remember things for long periods of time. These two types are not mutually exclusive; both can occur at the same time. Case studies also show that amnesia is commonly associated with damage to the medial temporal lobe. Additionally, specific areas of the hippocampus (the CA1 region) are involved in memory.Research has also shown that when the areas of dentiphalon are damaged.

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 Cause of Amnesia .The three categories are head injuries (example: head trauma), traumatic events (example: seeing something devastating to the mind) or physical impairments (example: atrophy of the hippocampus). Most of the related amnesia and  memory problems come from the first two categories as they are more common and the third could be considered a subcategory of the first. Head trauma is a very broad range as it deals with any type of injury or active action to the brain that could cause amnesia. Both retrograde and anterograde amnesia are seen most often by events like this, an exact example of either cause  would be electroconvulsive therapy, which would cause both briefly for the recipient patient. Traumatic events are more subjective. What is traumatic depends on what the person views as traumatic. Either way, a traumatic event is an event where something so distressing happens that the mind chooses to forget rather than deal with the stress. A common example of amnesia is that used by traumatic events. is dissociative amnesia, which occurs when the person forgets an event that has deeply troubled them. An example would be someone forgetting a fatal and graphic car accident involving  loved ones. Physical impairments are different from head injuries because physical impairments lean more towards passive physical problems.Examples of physical impairments include Alzheimer's disease, paraneoplastic neurological  syndromes such as anti-NMDA receptor encephalitis, and vitamin B12 deficiency. Among the specific causes of amnesia are the following: Electroconvulsive therapy in which seizures are electrically induced in patients for therapeutic effect can have acute effects that include both retrograde and anterograde amnesia. Alcohol can both cause blackouts and have deleterious effects on memory formation.