The space present in the middle of 3 layers of brain known as meninges. These meninges form the outer of the brain. The space under the arachnoid matter is referred as subarachnoid space.

SUBARACHNOID SPACE: "The place where cerebrospinal fluid is present is subarachnoid space."
Cite this page: N., Pam M.S., "SUBARACHNOID SPACE," in, April 13, 2013, (accessed May 11, 2021).