Figure 1
From: Dynorphin is expressed primarily by GABAergic neurons that contain galanin in the rat dorsal horn
PPD immunoreactivity in the rat dorsal horn. A confocal image from a transverse section of the L4 segment showing the laminar distribution of PPD. There is a dense band of immunostaining that occupies lamina I and lamina IIo, with variable extension into lamina IIi. This region contains several immunoreactive cell bodies, which are seen more clearly in the inset (corresponding to the box in the main image). Four immunoreactive cells are indicated with arrows. Lamina III contains a few scattered immunoreactive axons, while these are somewhat more numerous in laminae IV-V. The main image is a projection of 27 optical sections, while the inset is a projection of 2 sections. In each case the z-spacing is 2 μm. Scale bar = 100 μm