Final answer:
The fasciculus gracilis is the medial division of the dorsal column system and is responsible for transmitting touch and proprioception information from the lower body to the brain.
Step-by-step explanation:
The medial division of the dorsal column system, known as the fasciculus gracilis, is composed of fibers from sensory neurons in the lower body. It is part of the somatosensory pathway that transmits touch and proprioception information from the lower limbs and lower part of the body to the brain.
In the dorsal column system, the axons in the fasciculus gracilis terminate in the nucleus gracilis in the medulla. From there, the second neuron in the pathway projects its axons to the thalamus. Finally, the third neuron in the pathway sends its axons to the postcentral gyrus of the cerebral cortex, where the conscious perception of touch and proprioception occurs.
Overall, the fasciculus gracilis is responsible for transmitting sensory information from the lower body to the brain, allowing us to perceive touch and movement in our legs and lower limbs.