PNB 2274 Lecture Notes - Lecture 18: Dura Mater, Intervertebral Foramina, Rubrospinal Tract

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Information integration center, arcs outside of brain, from foramen magnum to 2nd lumbar (therefore shorter than vertebral column, in vivo development grew at different speeds, and at 4 spinal cord growth and vertebrae still grow). 31 pairs of nerves exit via intervertebral foramina. Spinal cord also delicate tissue, very close to spinal cord are meninges, similar to brain ones, 3 layers (dura mater, arachnoid, and pia mater from outside to inside). Dura matter has epidural space (like a gap), not in brain. Peel off the arachnoid for pic on right can see nerves exiting and denticulate ligament. An epidural tube goes in the l1-l3 region, into epidural space, can numb nerves themselves with their, doesn"t actually penetrate dura matter but goes lateral, towards nerve. To take sample of csf, easiest are is subarachnoid space of spine. In vertebrae, in central body are for grey matter dorsal and ventral horns, in between are intermediate zone.

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