NPY and migraine disorder: While in response to GTN treatment, there were no significant differences in NPY neuron populations in some migraine-related brain areas, such as the spinal nucleus of the trigeminal caudal part (SPVC, t(2, 10) = 2.121, P = 0.060), ventral posteromedial nucleus of the thalamus (VPM), lateral posterior nucleus of the thalamus (LP), and nucleus of the solitary tract (NTS, t(2, 10) = 0.776, P = 0.456).