Transient Global Amnesia

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• Affects patients between 40 and 80.
• Attack must be witnessed.
• Acute onset of anterograde amnesia must be present.
• Associated with repetitive questioning.
• No alteration in consciousness must be present. They may be disoriented in time and place.
• No cognitive impairment other than amnesia must be present.
• No loss of personal identity must be present.
• No focal neurology or epileptic features must be present.
• No recent history of head trauma or seizures must be present.
• Attack must resolve within 24 h.
• Other causes of amnesia must be excluded
• Attacks are often precipitated by a Valsalva manoeuver or physical activity including swimming, immersion in cold water, intercourse, acute pain, cerebral angiography, coughing, straining to defecate, heavy lifting, sawing and pumping and  psychological stressors.

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