What is the space between the two cerebral hemispheres?

The space between the two cerebral hemispheres is known as the longitudinal fissure. This deep groove separates the left and right hemispheres of the brain and contains the falx cerebri, a fold of the dura mater that helps anchor the brain within the skull. Additionally, this fissure allows for the passage of blood vessels and facilitates communication between the hemispheres through structures like the corpus callosum.