Cover legend: Heminodes and nodes on auditory nerve axons in the cochlea are labeled with Na_V1.6 (green), Ankyrin-G (blue), and Caspr (red) in the distal osseous spiral lamina of a 17-d-old rat. During postnatal maturation, axon initial segments are positioned adjacent to the habenula perforata (top). For more information, see the article by Kim and Rutherford (pages 2111–2118).