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Declarative memory consists of semantic memory and episodic memory.Semantic memory refers to acquired facts and general knowledge about the world. Examples include the name and physical attributes of objects and events, origins and history of objects, causes and effects of events or objects, associations between concepts, categories, opinions, beliefs, knowledge of historical events, etc. [2 ...
Amnesia is a deficit in memory caused by brain damage or brain diseases, [1] 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.
Difficulty creating recent term memories is called anterograde amnesia and is caused by damage to the hippocampus part of the brain, which is a major part of the memory process. [8] Retrograde amnesia is also caused by damage to the hippocampus, but the memories that were encoded or in the process of being encoded in long-term memory are erased [8]
The diagnostic criteria for TGA, as defined for purposes of clinical research, include: [2] The attack was witnessed by a capable observer and reported as being a definite loss of recent memory (anterograde amnesia). There was an absence of clouding of consciousness or other cognitive impairment other than amnesia.
Forgetting or disremembering is the apparent loss or modification of information already encoded and stored in an individual's short or long-term memory.It is a spontaneous or gradual process in which old memories are unable to be recalled from memory storage.
In neurology, semantic dementia (SD), also known as semantic variant primary progressive aphasia (svPPA), is a progressive neurodegenerative disorder characterized by loss of semantic memory in both the verbal and non-verbal domains. However, the most common presenting symptoms are in the verbal domain (with loss of word meaning).
The difference in memory between normal aging and a memory disorder is the amount of beta-amyloid deposits, hippocampal neurofibrillary tangles, or amyloid plaques in the cortex. If there is an increased amount, memory connections become blocked, memory functions decrease much more than what is normal for that age and a memory disorder is ...
As Alzheimer’s disease is the most common form of dementia — affecting an estimated 6.7 million Americans — it’s not surprising that people who experience memory loss may suspect AD.