attached to part of receives synaptic input from neuron adult head capsule rostrum proboscis muscle 2 dorsal motor neuron proboscis muscle 2 dorsal 2022-07-05T13:30:44Z proboscis muscle 2-1 fly_anatomy.ontology proboscis muscle 2 accessory retractor of rostrum Muscle with its origin in the posterior wall of the head and an insertion site in the posterior cuticle of the rostrum, near the posterior end of the apodeme of the rostrum, similar to muscles 1 and 2 ventral (McKellar et al., 2020). As the three of these contract, they pull the rostrum back into the head cavity (McKellar et al., 2020). It is synapsed by the proboscis muscle 2 dorsal motor neuron (McKellar et al., 2020). FBbt:00058788 proboscis muscle m2D maxillary retractor muscle rostrum muscle