GFAP and migraine disorder: In the acute migraine model, NTG administration induced microglial and astroglial activation in the TNC area that was detectable as an increased number of clusters of differentiation molecule 11b (CD11b)—(Figure 3A,G) and glial fibrillary acidic protein (GFAP)-positive cells (Figure 3D,H) when compared with the CT group.