Fig. 5

Distribution of 5HT-ir neurons in the VNC of Scolopendra oraniensis. All neurons were detected in every ganglion of all preparations. a These individually identifiable neurons can be distinguished according to somata positions within the ganglia into anterior (AC), lateral (LC), postero-lateral (PlC), and posterior cells (PC). b The initial projection of the ACs could been followed only for a short distance (arrows, but see f). c The LC project their neurites slightly posteriorly and medially towards the midline before the microscopic signal got lost (arrows). d Neurites of the PlC could only be traced for a short distance, projecting antero-laterally (arrows). e The pair of PCs project their processes anteriorly, before turning medially (arrows). f Contralateral projections could be detected in the anterior (gray arrows) and posterior parts (black arrows) of the ganglia at the level of the ACs and PCs, respectively. Compare also Fig. 6. g Reconstructions of ACs B. h Reconstructions of PCs (left) and its respective contralateral projections (right). Note that tracings were produced from different vibratome sections; arrows point to corresponding branching neurites. Compare also Fig. 6. Scale bars: A = 100 μm; B–F,H = 50 μm; G = 25 μm