Transient global amnesia
- Strenuous physical activity.
- Sexual intercourse.
- Medical procedures, such as angiography or endoscopy.
- Acute emotional distress, as might be provoked by bad news, conflict or overwork.
- Blocked arteries.
- Temporal lobe seizures.
- Migraine headaches.
- Is neurologically intact except for absent memory (for example, remains alert, remembers identity, remembers past experiences).
- Asks relevant questions repeatedly because she or he does not remember the answer.
- Is unable to recall the episode once she or he has recovered.
- Usually maintains her or his semantic memory (long-term memory responsible for retaining knowledge about the world, including the meaning of words and objects) and meta memory (the awareness of what one should know).
- Anterograde amnesia must be present.
- Computerized tomography (CT) scan: Using special X-ray equipment, CT machines obtain images from many different angles and join them together to show cross-sectional images of the brain and skull. CT scans can reveal abnormalities in brain structure, including narrowed, overstretched or broken blood vessels and past strokes.
- Magnetic resonance imaging (MRI): This technique uses a magnetic field and radio waves to create detailed, cross-sectional images of the brain. The MRI machine can combine these slices to produce 3-D images that may be viewed from many different angles.
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