Dorsal root:

spinal cord with arrow indicating a dorsal root.

spinal cord with arrow indicating a dorsal root.

the sensory root of a spinal nerve, which carries sensory information to the spinal cord and enters the posterior side of the cord.

Learn more: Know your brain - Spinal cord

Watch this 2-Minute Neuroscience video to learn more about the exterior of the spinal cord and this video to learn more about the interior of the spinal cord.