Final answer:
The dorsal root ganglion is the spinal cord landmark that is most proximal to the dorsal root ganglion.
Step-by-step explanation:
The dorsal root ganglion is a spinal cord landmark that is most proximal to the dorsal root ganglion. The dorsal root ganglion is a cluster of cell bodies of sensory neurons located just outside the spinal cord. It is attached to the dorsal (posterior) root of a spinal nerve, which is responsible for carrying sensory information from the body to the spinal cord.