Dorsal, lateral ventral columns of spinal cord
These are the white matter of the spinal cord. They contain bundles of myelinated axons that carry information up and down the spinal cord. For example, the dorsal columns convey sensory information (e.g., touch) up the spinal cord to the brain. Lateral columns convey motor information from the brain down the spinal cord, as well as pain and temperature info up the spinal cord to the brain.