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What type of peripheral nerve fiber is involved with transmission of dorsal column information?
Large, myelinated, fast-conducting nerve fibers carry dorsal column-type information.
What is the pathway by which this information reaches the cerebral cortex?
Sensation on skin → afferent sensory nerve → dorsal column on ipsilateral side (fasciculus gracilis and cuneatus) → lower medulla → synapse in nucleus gracilis and cuneatus → arcuate fibers → cross to the contralateral side into the medial lemniscus → ascend to the ventral posterolateral (VPL) nucleus of the thalamus → synapse → through the posterior limb of the internal capsule → postcentral gyrus of the cortex.
