outer most layer, it is tough!
epidural- it's space is located inside the bony spinal canal but just outside the dura mater
subdural- artificial space created by the separation of the arachnoid mater from the dura mater as the result of trauma, pathologic process, or the absence of cerebrospinal fluid as seen in a cadaver
LP- lumbar puncture, cerebrospinal fluid drawn from between two vertebrae
Where is the dura mater located?