Sensory information enters dorsal root in spinal cord â¢ Sensory (afferent) information ascends via the dorsal column â¢ Synapse in medulla (brainstem) â¢ Cross (decussate) to opposite side of the brainstem to form the medical-lemniscus pathway to thalamus â¢ Synapse in thalamus â¢ Ascend to the postcentral gyrus (sensory strip) of the parietal lobe o ...