attached to part of attached to receives synaptic input from neuron adult head capsule anterior arm of apodeme of rostrum-haustellum joint rostrum proboscis muscle 2 ventral motor neuron proboscis muscle 2 ventral 2022-07-05T13:30:44Z proboscis muscle m2V proboscis muscle 2-2 fly_anatomy.ontology 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 dorsal (McKellar et al., 2020). As the three of these contract, they pull the rostrum back into the head cavity (McKellar et al., 2020). This muscle also has an insertion site on the anterior arm of the apodeme of the rostrum-haustellum joint (McKellar et al., 2020). It is synapsed by the proboscis muscle 2 ventral motor neuron (McKellar et al., 2020). FBbt:00059087 rostrum muscle