Glowing green pyramids: a false positive for neocortical neurogenesis reveals a novel neuronal-microglial fusion in the postnatal brain.

neurons (two in green, one in red) stained in the same preparation by intracellular iontophoresis of Alexa fluor and imaged with confocal microscopy. Each projection neuron sends 8 –12 radial dendrites that each terminate in one of about 1,000 glomeruli. All the glomeruli sampled by each projection neuron are coplanar and the 1,000 glomeruli together fill an approximately spherical volume. Each glomerulus is approximately 35 m in diametglomerulus diameter. Stain by Sarah Farivar. For more information, see the article by Jortner et la., this issue (pages 1659 –1669). i This Week in The Journal