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fissure
(redirected from Sylvian fissure)

   Also found in: Dictionary/thesaurus, Medical, Legal, Wikipedia 0.01 sec.
fissure
1. Anatomy a narrow split or groove that divides an organ such as the brain, lung, or liver into lobes
2. a small unnatural crack in the skin or mucous membrane, as between the toes or at the anus
3. a minute crack in the surface of a tooth, caused by imperfect joining of enamel during development

fissure [′fish·ər]
(geology)
A high, narrow cave passageway.
An extensive crack in a rock.
(metallurgy)
A small cracklike discontinuity with a slight opening or displacement of the fracture surfaces.


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The cleft is usually situated in the region of sylvian fissure and can be unilateral or bilateral, or can be closed lip (type 1) or open lip (type 2).
Noncontrast CT scan of head showed a mass in the left sylvian fissure suggestive of a thrombosed aneurysm.
Close to the Sylvian fissure lies Broca's area, which is mainly involved in controlling the mechanical aspects of speech.
 
 
 
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