Final answer:
The function of the VPL nucleus is to relay sensory information from the spinal cord to the cerebral cortex.
Step-by-step explanation:
The function of the ventral posterolateral (VPL) nucleus of the thalamus is to relay sensory information from the spinal cord to the cerebral cortex. This nucleus is part of the thalamus, which is responsible for processing sensory information. Specifically, the VPL nucleus receives inputs from the 2nd-order neurons of the dorsal column-medial lemniscal tract and relays this information to the sensory cortex of the cerebral cortex.