Multiple sclerosis. Coloured magnetic resonance image (MRI) brain scan of a patient with multiple sclerosis (MS). The cerebral hemispheres are yell- ow (grey matter) and blue (white matter). Demyel- inated lesions,due to the destruction of the myelin sheaths around nerve fibres in MS victims,appear as bright circular regions (green) near the centre of the brain. The progressive,patchy des- truction of myelin sheath in the brain & spinal cord causes symptoms ranging from unsteady gait,tremors and speech defects to paralysis and death. The cause of MS is unknown,although genetic fac- tor are thought to be involved. The search for a cure is still in progress | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Camazine, Scott |
Taille de l’image : | 3859 px × 2764 px |
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