Subarachnoid haemorrhage. Magnetic resonance imaging (MRI) scan of an axial section through the brain of a patient with a subarachnoid haematoma (light grey,centre left),a solid mass of blood below the arachnoid membrane,the middle of the three membranes that cover the brain. Bleeding (haemorrhage) in the brain occurs when a blood vessel,such as an artery,ruptures. It may be caused by a head injury,high blood pressure or vascular disease. The area of the brain supplied by the ruptured artery may die due to lack of oxygenated blood,leading to a stroke | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Du Cane Medical Imaging |
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