part of larval abdominal segment A1-7 anterior abdominal segment embryonic/larval hypodermal muscle hypodermal muscle of larval abdomen hypodermal muscle of A1-7 2022-07-05T13:30:44Z body wall muscle fly_anatomy.ontology FBbt:00059150 Muscles that are part of the body wall of larval abdominal segments A1-7. These muscles are usually innervated by three motorneurons: a specific glutamatergic motor neuron via type Ib terminal boutons, a common glutamatergic motor neuron via type Is boutons and a common modulatory motorneuron via type II or III terminal boutons.