Introduction | Global Amnesia

<< Transient Global Amnesia: Emergency Department Evaluation And Management


Transient global amnesia (TGA) is a clinical syndrome marked by the acute onset of profound anterograde amnesia (the inability to form new memories) lasting up to 24 hours in the absence of other neurologic deficits or changes in alertness and cognition. Retrograde amnesia (the loss of pre-existing memories) can also occur. In TGA, isolated loss of new memory formation is limited to facts and events (declarative memory), and patients retain implicit and procedural memory (motor tasks and coordination). 

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