Figure 2From: Non-peptidergic primary afferents are presynaptic to neurokinin-1 receptor immunoreactive lamina I projection neurons in rat spinal cord Confocal images at high magnification obtained from parasagittal spinal cord sections showing CGRP-IR (green) and P2X3-IR (red) varicosities in the superficial dorsal horn. P2X3-IR varicosities were present in considerable number in lamina I (LI) but were more highly concentrated in inner lamina II (LIIi). Scale bar = 20 μm.Back to article page