Source:http://linkedlifedata.com/resource/umls/id/C0007799
CSP: cavities within the brain which are filled with cerebrospinal fluid, including the two lateral, the third, and linked by the aqueduct, the fourth ventricles; lined by ependyma which in certain regions, is invaginated by vascular fringes of pia mater to form the choroid plexuses.,NCI: The four connected cavities (hollow spaces) centrally located within the brain that connect posteriorly with the central canal of the spinal cord. (NCI),NCI: The four connected cavities (hollow spaces) centrally located within the brain that connect posteriorly with the central canal of the spinal cord.