Demystifying MR Neurography of the Lumbosacral Plexus: From Protocols to Pathologies

Figure 1

Illustrations ((a) and (b)) showing the anatomy of the lumbar plexus, which is formed by the ventral rami of L1–L4 ± T12, gathering inside or posterior to the psoas muscle belly. The lumbar plexus originates from the iliohypogastric nerves (T12 ± L1), ilioinguinal (L1 ± T12), genitofemoral (L1 and L2), femoral (L2–L4), cutaneous femoral (L2 and L3), obturator (L2–L4), and lumbosacral trunk (L4 and L5). Illustrations by FJMN.

(a)

(b)