GCA / SCIENCE PHOTO LIBRARY GCA / SCIENCE PHOTO LIBRARY
Brain haemorrhage. False-colour computed tomo- graphy (CT) scan of an axial slice through the brain, showing intraventricular haemorrhage. At centre left, the large area of haemorrhage (red) can be seen within cerebral tissue (green). There are four fluid-filled cavities, or ventricles, in the brain. Here, the lateral ventricle of the left cerebral hemisphere is affected. Brain haemorrhage occurs either after a head injury or is caused by the spontaneous rupture of blood vessels. Intra- cerebral haemorrhage, as seen here, usually occurs spontaneously. Elderly people with hypertension are most at risk; it is a cause of stroke, and may lead to sudden headache and loss of consciousness.
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