GENERAL HISTOLOGY

Detailed explanation-1: -A sulcus is a shallower groove that surrounds a gyrus. A fissure is a large furrow that divides the brain into lobes and also into the two hemispheres as the longitudinal fissure.

Detailed explanation-2: -The shallow grooves on the surface of the cerebral cortex are called sulci, whereas the folds of the cortex are called gyri.

Detailed explanation-3: -The folding of the cortex increases the brain’s surface area allowing more neurons to fit inside the skull and enabling higher functions. Each fold is called a gyrus, and each groove between folds is called a sulcus. There are names for the folds and grooves that help define specific brain regions.

Detailed explanation-4: -The sulci and fissures are both grooves in the cortex. However, they are distinguished by their size. While the sulcus is a shallower groove surrounding the gyrus, fissures are larger furrows dividing the brain into lobes and also into two hemispheres as the longitudinal fissure.

Detailed explanation-5: -The sulcus lies between the head and the styloid process on the dorsal surface of the distal end of the ulna. This groove has deep and shallow forms and, rarely, a flat form. The sulcus was classified into 4 grades according to its depth.