Vertebral artery loop in a case of recurrent transient global amnesia

Transient global amnesia (TGA) denotes a temporary anterograde amnesia and a mild reduction of retrograde episodic memory, while immediate recall ability is preserved. TGA is of sudden onset, lasts about 4–6 h, and typically no focal neurological findings are appreciated on the clinical exam. The medial temporal lobe supplied by the posterior cerebral circulation has been identified as the affected anatomical correlate, however, pathophysiology remains elusive [1]. A broad spectrum of conditions may trigger TGA, including emotional stress, migraine, or physical effort.

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