Representative confocal images of GluR1 (A and D, red) and stargazin (B and E, green) immunoreactivity in the dorsal horn of L5–L6 spinal segment. Colocalization (merge) is shown in yellow/orange (C and F). Double-labeled neurons are indicated by arrows. A, B, and C are shown in lower magnification. D, E, and F are shown in higher magnification. Scale bars: 100 μm (A) and 20 μm (D).