The two most commonly affected lumbar facet joints are L4–L5 and L5–S1, so the nerves innervating these joints — the L3 and L4 medial branches and the L5 dorsal ramus — are most frequently ...

These sensory and motor nerve roots unite to create the 31 spinal nerves, each named for the individual vertebra from which it exits. The spinal nerves further divide into anterior and posterior rami.

Spinal stimulation only needs to reach these few nerve fibers to bring them back to life. There is a caveat, though: Long-term improvements occurred only while the patients had their stimulation ...