Cover legend: Layer III pyradimal cell of cerebral cortex of mouse from an original preparation of Santiago Ramón y Cajal impregnated with the Golgi method (P80001). Z-projection (32 sections; z-step, 2.072 µm). Objective, 20×; numerical aperture, 0.75 (ImageJ). For more information, see the article by García-López et al. in this issue (pages 11249–11252).