There were no focal neurological signs or deficits during or after the attack.There was an absence of clouding of consciousness or other cognitive impairment other than amnesia.The attack was witnessed by a capable observer and reported as being a definite loss of recent memory (anterograde amnesia).The diagnostic criteria for TGA, as defined for purposes of clinical research, include: The degree of amnesia is profound, and, in the interval during which the individual is aware of his or her condition, is often accompanied by anxiety. The individual simply cannot recall anything that happened outside the last few minutes, while memory for more temporally distant events may or may not be largely intact.
CASE STUDIES OF TRANSIENT EPILEPTIC AMNESIA FULL
However, a TGA episode generally lasts no more than 2 to 8 hours before the patient returns to normal with the ability to form new memories.Ī person having an attack of TGA has almost no capacity to establish new memories, but generally appears otherwise mentally alert and lucid, possessing full knowledge of self-identity and identity of close family, and maintaining intact perceptual skills and a wide repertoire of complex learned behavior. īoth TGA and anterograde amnesia deal with disruptions of short-term memory.
A person in a state of TGA exhibits no other signs of impaired cognitive functioning but recalls only the last few moments of consciousness, as well as possibly a few deeply encoded facts of the individual's past, such as their childhood, family, or home perhaps. Transient global amnesia ( TGA) is a neurological disorder whose key defining characteristic is a temporary but almost total disruption of short-term memory with a range of problems accessing older memories.
Medical condition Transient global amnesiaĪreas of hypoperfusion, seen above in the left sided hippocampus (seen as white punctate lesions on diffusion weighted MRI) are a characteristic finding in Transient Global AmnesiaĬlinical diagnosis, imaging may aid in diagnosis
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