BIO 11 Lecture Notes - Lecture 28: Epidural Space, Ventral Root Of Spinal Nerve, Foramen Magnum
3 Sep 2020
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Document Summary
Protect cord with bony canal, physical stability and shock absorption. Dura mater dense irregular, simple squamous. The outer epithelium is not attached to the bony walls of the vertebral canal epidural space. Attaches to edge of foramen magnum which stabilizes the spinal cord within the vertebral canal. Formed by the spinal dura tapering and forming dense cord of collagen fibers that blend with filum terminale (terminal thread- tip of conus medullaris) Shock absorber and diffusion medium for dissolved gas, nutrients, chemical messengers and waste products. Inner surface of the dura is lined by the outer surface of the arachnoid. Subarachnoid space separates the arachnoid mater from the pia mater. Easily accessed between l3 and l4 spinal tap. Denticulate ligaments located along the length of the spinal cord found between the dorsal and ventral roots of the spinal nerve (extensions of the spinal pia mater and connect to pia and arachnoid to the dura) Spinal tap (this one goes to 11)
