AM disaggregation to VLM formation. At the P3 stage in Drosophila pupal development, anterior alary muscle syncytia undergo reprogramming (through Hippo and JNK signaling proteins) to disaggregate into mononucleate myoblasts, which, by the P7 stage, fuse among themselves to form the ventral longitudinal muscle. Hpo, Hippo; Sd, Scalloped.