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Figure 5 | Neural Development

Figure 5

From: The abdomen of Drosophila: does planar cell polarity orient the neurons of mechanosensory bristles?

Figure 5

The dispositions of bristle cells in late pupae. (a) The socket cells (yellow nuclei) are marked by Su(H).lacZ; over the entire A compartment the nuclei are located lateroanterior to the socket (white arrowhead) of each bristle. (b) A right hemisegment to show the pattern of innervation of all the bristles, note the disposition of the cells and the axonal pathways depends on position (compare Figure 4). In the anterior zone, the dendrites (white arrows) make U-shaped turns between the sockets (white arrowheads) and the neuronal somata (n), and the axons (red arrows) extend posteriorly to meet the peripheral abdominal nerve (pink arrowhead). In the medial zone both axons and dendrites grow medially. In the posterior zone, the dendrites extend directly anteriorly from the bristles, and the axons continue anteriorly to join the nerve. The yellow arrowhead marks a md neuron that lies on the nerve [47]. (c) The sheath cell is marked by pros.lacZ and the neuron with 22C10. On the left the neuron is from the anterior zone and shows a U-shaped dendrite, with the axon growing posteriorly. On the right, a neuron is shown from the posterior zone, the neuronal soma is located anterior to the bristle and the axon grows anteriorly. In both cases the sheath cell (st) is closely associated with the neuron.

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