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Illness, though much rarer, can also cause anterograde amnesia if it causes encephalitis, which is the inflammation of brain tissue. There are several types of encephalitis: one such is herpes simplex encephalitis (HSV), which, if left untreated, can lead to neurological deterioration. How HSV gains access to the brain is unknown.
Amnesia is an abnormal mental state in which memory and learning are affected out of all proportion to other cognitive functions in an otherwise alert and responsive patient. [5] There are two forms of amnesia: Anterograde amnesia and retrograde amnesia, that show hippocampal or medial temporal lobe damage.
Dissociative amnesia results from a psychological cause as opposed to direct damage to the brain caused by head injury, physical trauma or disease, which is known as organic amnesia. Individuals with organic amnesia have difficulty with emotion expression as well as undermining the seriousness of their condition.
Anterograde amnesia is one type of memory loss where people have difficulty forming new memories after the amnesia-causing event. Anterograde amnesia is one type of memory loss where people have ...
The amnesia may cover events over a longer or only a brief period. Typically, it declines with time, with earlier memories returning first. [9] There are many possible causes of amnesia. The most common include Alzheimer's disease, traumatic brain injury, brain infection (such as encephalitis or meningitis), dementia, seizures, and stroke. Less ...
For example, anterograde amnesia, from damage of the medial temporal lobe, is an impairment of declarative memory that affects both episodic and semantic memory operations. [16] Originally, Tulving proposed that episodic and semantic memory were separate systems that competed with each other in retrieval.
Social amnesia is a collective forgetting by a group of people. The concept is often cited in relation to Russell Jacoby 's scholarship from the 1970s. Social amnesia can be a result of "forcible repression " of memories, ignorance , changing circumstances, or the forgetting that comes from changing interests.
Individuals with retrograde amnesia may partially regain memory later, but memories are not regained with anterograde amnesia because they were not encoded properly. [ 8 ] The term "post-traumatic amnesia" was first used in 1940 in a paper by Symonds to refer to the period between the injury and the return of full, continuous memory, including ...