sulcus

1. (anatomy) any of the narrow grooves in an organ or tissue especially those that mark the convolutions on the surface of the brain (synset 105230843)
   referred to in: anatomy, general anatomy - the branch of morphology that deals with the structure of animals
   is a type of: fissure - (anatomy) a long narrow slit or groove that divides an organ into lobes
   subtypes:

   • central sulcus, fissure of rolando, rolando's fissure, sulcus centralis - a brain fissure extending upward on the lateral surface of both hemispheres; separates the frontal and parietal lobes
   • fissure of sylvius, lateral cerebral sulcus, sulcus lateralis cerebri, sylvian fissure - the deepest and most prominent of the cortical fissures; separates the frontal lobes and temporal lobes in both hemispheres
   • parieto-occipital fissure, parieto-occipital sulcus - a sulcus near the posterior end of each hemisphere that separates the parietal lobes and the occipital lobes in both hemispheres
   • calcarine fissure, calcarine sulcus - a sulcus in the mesial surface of the occipital lobe of the cerebrum

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