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Simian fissure

From Biology-Online Dictionary | Biology-Online Dictionary
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simian fissure --> lunate cerebral sulcus

A small, inconstant semilunar groove on the cortical convexity near the occipital pole, marking the anterior border of the striate cortex (area 17) and considered homologous with the major sulcus of the same name that is a more constant feature of the cerebral cortex in monkeys and apes.

Synonym: sulcus lunatus cerebri, ape fissure, lunate fissure, lunate sulcus, simian fissure.