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]

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

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 brain’s size.

Aug 23, 2025 · A sulcus, in biology and anatomy, refers to a furrow, groove, or indentation. This term describes a depression found across various anatomical structures, not solely within the brain.

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.

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.

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

What is a Sulcus? A sulcus (plural: sulci) is a shallow groove or furrow found on the surface of the brain, which separates the raised ridges known as gyri.