Transient global amnesia

Transient global amnesia
Areas 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 Amnesia
Specialty	Neurology
Symptoms	Memory impairment
Complications	Usually no long term sequelae
Usual onset	Sudden
Duration	Less than 24 hours
Causes	Unknown
Diagnostic method	Clinical diagnosis, imaging may aid in diagnosis
Treatment	Reassurance
Medication	None
Prognosis	Good

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. 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.^[1][2]

Both TGA and anterograde amnesia deal with disruptions of short-term memory. 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.