Figure 7
From: Internal receptors in insect appendages project directly into a special brain neuropile
Tarsal neurons as seen after staining nerves with nickel chloride. A shows tarsal segments 2 and 3 (ta2, ta3), arolium (ar), and claws (cl). The numerous blue dots are the somata of sensory neurons. Most prominent are the somata of sensory neurons in two scolopidial organs (arrowheads) and that of two large campaniform sensilla on the arolium (arrows). B The neurons of the distal scolopidial organ at higher magnification. Please note the typical bipolar morphology of these cells in comparison to the cells shown in C and D. C 1 The root of a side branch of the anterior nerve 5B2 (N5B2) contains a soma. C 2 The same neuron at higher magnification. D Another example for a soma within a nerve branch point. Again a bulge-like extension of the neuron is visible (arrow). Scales: 200 μm in A, 50 μm in B and C 2 , 100 μm in C1, 20 μm in D.