Neural-Dural Transition at the Thoracic and Lumbar Spinal Nerve Roots: A Histological Study of Human Late-Stage Fetuses

Figure 7

A diagram showing a tortuous course of the dorsal ramus starting from a large pocket-like protrusion of the dura. Note a difference in thickness of the dural sheath (blue) between the dorsal root ganglion (DRG) and the nerve rootlets from the spinal cord. In this diagram, the ventral ramus also accompanies a small pocket but it takes a straight course with the anterior radicular artery (red, RA).