| insular sclerosis | <neurology> Neurodegenerative disease characterised by the gradual accumulation of focal plaques of demyelination particularly in the periventricular areas of the brain. Peripheral nerves are not affected. Onset usually in 3rd or 4th decade with intermittent progression over an extended period. Cause still uncertain. (18 Nov 1997) |
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| insular veins | Veins draining the cortex of the insula, tributaries to the deep middle cerebral vein. Synonym: insular veins. (05 Mar 2000) |