Definition of Sylvian fissure in English:

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Sylvian fissure

Pronunciation: /ˌsilvēən ˈfiSHər/
(also fissure of Sylvius /ˈsilvēəs/)


A large diagonal fissure on the lateral surface of the brain that separates off the temporal lobe.
Example sentences
  • If a cut is made into the depth of the Sylvian fissure, dividing the brain in two, a complex series of structures is revealed on the inner surface of the hemisphere.
  • In each instance this artery proceeded laterally in the Sylvian fissure to share a part of the territory of supply of the middle cerebral artery, i.e., the lateral part of the orbital surface of the frontal lobe.
  • This region surrounds the posterior limit of the Sylvian fissures and extends inferiorly into the lateral temporal lobes.


Mid 19th century: named after François de la Boë Sylvius (1614–72), Flemish anatomist.

For editors and proofreaders

Syllabification: Syl·vi·an fis·sure

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