Fig. 1. Morphology and potential contact sites of Retzius neurones. (A) Three-dimensional reconstruction from serial confocal images of one Retzius neurone filled with Lucifer Yellow showing multiple fine neurites emerging from the primary process. The visualization of the somata of the contralateral neurone and of two small neurones in the lower right-hand corner resulted from autofluorescence. Anterior is to the left. (B) Three-dimensional confocal reconstruction of the dendritic arborization of a pair of Retzius neurones. The neurone coloured yellow was stained with Lucifer Yellow, while the blue neurone was injected with Texas Red. The somata were removed to avoid optical interference. Note the extensive dendritic overlap. The white dots are potential contact sites between the neurones. Autofluorescent somata of multiple neurones served to outline the ganglion. The arrow points to the anterior. Scale bar for both images, 30 µm.
