Tags: Anatomical Structure.
In the central nervous system the subarachnoid cavity (subarachnoid space) is the anatomic space between the arachnoid membrane and pia mater.It is occupied by spongy tissue consisting of trabeculae (delicate connective tissue filaments that extend from the arachnoid mater and blend into the pia mater) and intercommunicating channels in which the cerebrospinal fluid is contained.
