Complex sentence: The degenerating nerves are in the dorsal columns (posterior columns) of the spinal cord (the portion closest to the back of the body) and carry information that help maintain a person's sense of position (proprioception), vibration, and discriminative touch.
Split into simpler sentences: The degenerating nerves are in the dorsal columns (posterior columns) of the spinal cord (the portion closest to the back of the body). They help maintain a person's sense of position (proprioception), vibration, and discriminative touch.