Coverings = meninges
 
        1. Epidural (extradural) space
            a. fat
            b. connective tissue
            c. venous plexus - anterior and posterior internal vertebral plexus
            d. spinal arteries - in subarachnoid space

        2. Dura mater
            a. terminates as coccygeal ligament
            b. denticulate ligaments - suspension of pia mater - 21 attachments
            c. blends with epineurium of spinal nerves
            d. subdural space - potential space

        3. Arachnoid
            a. subarachnoid space - contains cerebrospinal fluid (CSF)
            b. arachnoid trabeculae - connect pia

        4. Pia mater
            a. continues as filum terminale - intradural portion ends at S2
            b. denticulate ligaments - anchor cord

        5. Subarachnoid space
            a. formed by choroid plexus
            b. lumbar cistern L2-S2
            c. shock absorbtion
            d. Spinal tap = lumbar puncture – at L4-5 interspace