GROSS ANATOMY

Detailed explanation-1: -A fissure is a deeper grove and is often used interchangeably with sulcus. The cerebrum is divided into a left and right hemisphere by a longitudinal fissure that goes by many different names: longitudinal fissure, cerebral fissure, median longitudinal fissure, interhemispheric fissure.

Detailed explanation-2: -A fissure or groove that separates the two hemispheres is called the great longitudinal fissure. The two sides of the brain are joined at the bottom by the corpus callosum.

Detailed explanation-3: -The deep furrows are called fissures and shallow ones are called sulci (singluar; sulcus). The ridges between the sulci are known as a gyri (singular; gyrus). Major sulci and fissures divide each hemisphere into four lobes: the frontal, parietal, occipital, and temporal lobes.

Detailed explanation-4: -In humans, the lobes of the brain are divided by a number of bumps and grooves. These are known as gyri (bumps) and sulci (groves or fissures). The folding of the brain, and the resulting gyri and sulci, increases its surface area and enables more cerebral cortex matter to fit inside the skull.

Detailed explanation-5: -Brain Sulci or Fissures Interhemispheric (Medial Longitudinal Fissure): This is a deep furrow located down the center of the brain that separates the left and right brain hemispheres. The corpus callosum, a wide ribbon of nerves, is located within this fissure.