What does the word interhemispheric fissure mean?

The interhemispheric fissure, also known as the medial longitudinal fissure, is the deep groove within the midline separating both cerebral hemispheres and containing the falx cerebri.

What is a interhemispheric cyst?

Interhemispheric arachnoid cysts (IHACs) are rare congenital lesions containing cerebrospinal fluid (CSF) surrounded by arachnoid membranes located in the interhemispheric fissure. Overall arachnoid cysts (AC) comprise about 1% of all intracranial lesions.

What is the median longitudinal fissure?

The median longitudinal fissure is a deep groove in between the two hemispheres. It is also called cerebral fissure or interhemispheric fissure. It is also referred to as simply longitudinal fissure. The falx celebri (or cerebral fals), a fold of the dura mater, covers it.

What happens in the longitudinal fissure?

All three meninges of the cortex (dura mater, arachnoid mater, pia mater) fold and descend deep down into the longitudinal fissure, physically separating the two hemispheres. The vasculature of falx cerebri supplies blood to the innermost surfaces of the cortex, neighboring the midsagittal plane.

What kind of fissure is the interhemispheric fissure?

The interhemispheric fissure, also known as the medial longitudinal fissure, is the deep groove within the midline separating both cerebral hemispheres and containing the falx cerebri. Being a fissure, it also contains CSF as well as some midline branches of the ACA and PCA.

What kind of fissure is median longitudinal fissure?

Median longitudinal fissure visible in red, running top to bottom. The longitudinal fissure (or cerebral fissure, great longitudinal fissure, median longitudinal fissure, interhemispheric fissure) is the deep groove that separates the two cerebral hemispheres of the vertebrate brain.

Which is fissure separates the two hemispheres of the brain?

Longitudinal fissure. The longitudinal fissure (or cerebral fissure, medial longitudinal fissure, or interhemispheric fissure) is the deep groove that separates the two hemispheres of the vertebrate brain. The medial surfaces of the two hemispheres are as similarly convoluted by gyri and sulci as is the outer surface…

Where does the falx cerebri cross the longitudinal fissure?

Longitudinal fissure. The medial surfaces of the two hemispheres are as similarly convoluted by gyri and sulci as is the outer surface of the brain. The falx cerebri, a dural brain covering, lies within the longitudinal fissure. The corpus callosum crosses between the two hemispheres at the bottom of the longitudinal fissure.