| Transient global amnesia | |
|---|---|
 | |
| Abnormal hippocampus findings consistent with transient global amnesia on MRI | |
| Specialty | Neurology |
| Usual onset | Sudden[1] |
| Duration | Up to 24 hrs[1] |
| Causes | Unknown[1] |
| Risk factors | Migraines, family history[1] |
| Diagnostic method | Based on symptoms after ruling out other possible causes[1][2] |
| Differential diagnosis | Toxins, stroke, seizure, migraine, concussion, encephalitis[1] |
| Treatment | Observation[1] |
| Prognosis | Good[1] |
| Frequency | 7 per 100,000 per year[1] |
Transient global amnesia (TGA) is a condition of sudden onset, were people are unable to form new memories.[1] There may also be problems remembering recent past memories.[1] No other signs of neurological problems are generally present and the condition lasts less than 24 hours.[1]
The cause is unclear.[1] Risk factors include a history of migraines and a family history.[1] Triggers may include emotional or physical stress.[1] Diagnosis is based on symptoms after ruling out other potential causes including: stroke, epilepsy, encephalitis, migraine, and concussion.[1][3][2]
Treatment generally involves observation with repeated examinations until the ability to form new memories returns.[1] The period of memory loss generally does not return.[1] Outcomes are good, though up to 5% of people may have another episode within a year.[1]
Transient global amnesia affects about 7 per 100,000 people a year.[1] It most commonly occurs in those over the age of 50.[1] Males and females are affected with similar frequency.[1] It was first clearly described in the 1950s.[1]
References edit
- ^ a b c d e f g h i j k l m n o p q r s t u v w Faust, JS; Nemes, A (August 2016). "Transient Global Amnesia: Emergency Department Evaluation And Management". Emergency medicine practice. 18 (8): 1–20. PMID 27416582. Archived from the original on 2021-09-23. Retrieved 2021-09-18.
- ^ a b Arena, JE; Rabinstein, AA (February 2015). "Transient global amnesia". Mayo Clinic proceedings. 90 (2): 264–72. doi:10.1016/j.mayocp.2014.12.001. PMID 25659242.
- ^ Nehring, SM; Spurling, BC; Kumar, A (January 2021). "Transient Global Amnesia". PMID 28723030.
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