Memory disorders

Amnesia is a deficit in memory caused by brain damage or brain diseases, but it can also be temporarily caused by the use of various sedative and hypnotic drugs. The memory can be either wholly or partially lost due to the extent of damage that is caused.

mental disorder, characterized by multiple personality states and amnesia

mental illness caused by a lack of thiamine in the brain

memory of events that actually did not happen

Hyperthymesia, also known as hyperthymestic syndrome or highly superior autobiographical memory (HSAM), is a condition that leads people to be able to remember an abnormally large number of their life experiences in vivid detail. It is extraordinarily rare, with fewer than 100 people in the world having been diagnosed with the condition . A person who has hyperthymesia is called a hyperthymesiac.

combined presence of Wernicke's encephalopathy (WE) and Korsakoff's syndrome

dissociative disorder

thumb|alt=Monotropic and polytropic learning|Monotropic (hyperfocus) and polytropic learning

syndrome

difficulties in the brain's retrieval of ideas and experiences

type of motivated forgetting when an individual consciously attempts to stop thinking about a particular thought

Allomnesia or memory illusion is a memory disorder which involves distorted memories of a past situation. It is generally a physiological phenomenon, which is occasionally found in most subjects. Pathologically, it can occur frequently in subjects with mood disorders such as depression or mania and in those with schizophrenia, paranoia or other types of delirium. Treatment is done by identifying the cause of the disease and treating the same.

theorized behavior in which people forget unwanted memories

Pseudodementia (otherwise known as depression-related cognitive dysfunction or depressive cognitive disorder) is a condition that leads to cognitive and functional impairment imitating dementia that is secondary to psychiatric disorders, especially clinical depression. Pseudodementia can develop in a wide range of neuropsychiatric disease such as depression, schizophrenia and other psychoses, mania, dissociative disorders, and conversion disorders. The presentations of pseudodementia may mimic organic dementia, but are essentially reversible on treatment and doesn't lead to actual brain degene