Transient Epileptic Amnesia (TEA)

"Transient amnesia" refers to repeated attacks of memory loss.

There are a number of well recognised causes of transient amnesia, the most common probably being head injury, followed by transient global amnesia, migraine, drugs and rarely, transient ischemic attacks ("mini strokes"). It has recently been recognised that transient amnesia can also be caused by epilepsy.

TEA is often misdiagnosed as either transient global amnesia (TGA) or psychogenic amnesia. Distinguishing TEA from other causes of amnesic attacks is an important step in developing successful treatment programmes for this form of amnesia and its associated memory deficits.


A diagnosis of TEA requires the following:

Butler and colleagues recruited 50 patients with TEA using these diagnostic criteria in order to assess the clinical features of the syndrome. They found the following:

Results from our studies have also shown that TEA is associated with two particular types of memory difficulty between attacks:

Accelerated forgetting and Autobiographical amnesia

In addition, some patients with TEA also notice an impaired ability to navigate around new and familiar routes; called topographical amnesia.