(B) Schematic drawing of a stage 17 Drosophila embryonic head, highlighting the position of selected MNs (MN2c, MN2a, MN4, MN3) and feeding muscles (LR, MHE, MHD) located in consecutive segments expressing different Hox proteins (Lab, Dfd, Scr). Each MN innervates a specific muscle by a FasII-positive axonal projection, projection A connects MN2a and the MHE muscle, while projection B connects the MN3 with the MHD muscle. 