A sulcus is a shallow groove that surrounds a gyrus or part of a gyrus. A fissure is a deeper furrow that divides the brain into lobes, and also into the two hemispheres as the longitudinal fissure. [4]

May 7, 2025 · Sulci (singular: sulcus) are the grooves or furrows that separate the gyri. This pattern of folds increases the brain’s surface area, packing in more neurons without increasing …

The meaning of SULCUS is furrow, groove; especially : a shallow furrow on the surface of the brain separating adjacent convolutions.

Jul 31, 2025 · A sulcus (plural: sulci) refers to a shallow depression or groove found on the cerebral cortex. These grooves separate the raised ridges, known as gyri (singular: gyrus). …

Nov 1, 2025 · Borrowed from Latin sulcus (“a furrow made by a plow”). Doublet of sullow ("plough").

ciliary sulcus A groove situated between the posterior root of the iris and the ciliary body. It may be used, sometimes, as a site of fixation of an intraocular lens implant.

A palpable nodule or a hard irregular gland with loss of the median sulcus raises the suspicion of cancer.

SULCUS definition: a furrow or groove. See examples of sulcus used in a sentence.

Fissures or grooves in the surface of the cortex are called sulci (singular, sulcus; Latin, “furrow, groove, ditch, trench”). Deep grooves are called fissures.

The primary cerebral sulci, such as the central sulcus, the lateral sulcus, and the parieto-occipital sulcus, play a role in dividing the brain into four main lobes.