Final answer:
The 2nd-order neuron of the dorsal column-medial lemniscal tract ascends contralaterally in the medial lemniscus (brainstem and above).
Step-by-step explanation:
The statement is True. The 2nd-order neuron of the dorsal column-medial lemniscal tract does indeed ascend contralaterally in the medial lemniscus in the brainstem and above. The dorsal column system is composed of three successive neurons that transmit sensory information to the brain. The 2nd-order neuron carries the sensory information from the medulla to the thalamus, while the 3rd-order neuron projects the information to the postcentral gyrus of the cerebral cortex for further processing and conscious perception.