Disorders of Memory
1.Short-term memory (working memory):
For verbal and visual information, retained for 15-20 sec., low capacity, e.g. retaining phone number while dialing.
2.Long-term memory:
Wide capacity and more permanent storage,e.g. childhood memories, language vocabulary
3.Amnesia:
Severe memory loss.
4.Retrograde amnesia:
Cannot recall events that occurred prior to the brain trauma.
5.Anterograde amnesia:
Cannot recall events that occurs after the brain trauma. Occurs due to failure to make permanent traces.
6.déja vu:
It comprises the feeling of having experienced a current event in the past, although it has no basis in fact.
7.Jamais vu:
It is opposite to déja vu. The phenomenon of experiencing a situation that one recognizes in some fashion, but that nonetheless seems very unfamiliar.
8.Confabulation:
Gaps in memory are unconsciously filled with fabricated, misinterpreted, or distorted information
9.Amnesic disorientation:
Characterized by disorientation particularly in time, impairment of immediate recall, loss of recent memory, retroactive loss of remote memory of varying extent and a tendency to confabulation
10.Hypomnesia:
Abnormally poor memory of the past
11.Hypermnesia:
Unusual power or enhancement of memory,typically under abnormal conditions such as trauma, hypnosis,or narcosis.
12.Korsakofft's syndrome: Occurs due to vitamin B1 (thiamin)deficiency Memory problems are often preceded by ataxia.
13.Transient global amnesia: It is characterized by a patient's inability to learn new material. Perception and personal identity
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