Figure 1.

Perineuronal nets surround parvalbumin positive interneurons throughout the ventral hippocampus. Photomicrographs at increasing levels of magnification (from top to bottom) demonstrate the distribution of parvalbumin positive interneurons (red) and perineuronal nets (green) throughout the ventral regions of the hippocampus. The merged images (c, f and i) demonstrate that a significant number of parvalbumin-containing neurons are enveloped by perineuronal nets, as determined by lectin labeling.