60.2 MB (3.1 MB compressed)
5037 x 4179 pixels
42.7 x 35.3 cm ⏐ 16.8 x 13.9 in (300dpi)
ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Headache or epilepsy. Abstract image of a Computed Tomography (CT) scan of a human brain, with a bolt of lightning superimposed to depict headache or migraine or epilepsy. The brain has been sliced through to show a side view of its internal anatomy and its folded structure. The pain of a headache does not itself come from the brain, but from membranes around the brain and from the scalp. The pain is produced by tension in these structures. Migraine is a severe headache, often accompanied by visual disturbances and nausea. Epilepsy is characterised by seizures caused by chaotic electrical activity in the brain. Attacks can be triggered by a variety of factors.
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