This is similar to creating a permanent file or recording. Other parts of the brain perform this filing function. Occasional memory lapses or forgetfulness are common. These may be associated with depression , stress, lack of sleep, and normal aging. Memory loss only becomes a problem when it is severe and interferes with daily living.
Amnesia is a severe form of memory loss.
It may be a partial or complete lack of recall. Depending on the cause of amnesia, the memory loss may arise suddenly or slowly. It also can be temporary or permanent. Many people with progressive memory loss may not be aware of their worsening forgetfulness. Family members or friends may be more able to judge whether memory lapses are getting worse.