Address: 8686 Bay Parkway, Suite M4 Brooklyn, NY 11214 Phone: 646-647-8720 The covering over the nerve roots in the spine is called the dura. The sleeve-like space surrounding the dura is called the epidural space. Nerves travel through the epidural space before they move into your legs. The nerves leave the spine from small nerve holes. These nerves may become inflamed due to irritation from a damaged disc or contact with a bone spur.