somatic muscle of mesothorax flight muscle 2022-07-05T13:30:44Z FBbt:00058881 fly_anatomy.ontology Muscle involved in the mechanism of flight. The indirect flight muscles are involved in the deformation of the thoracic terga that bear the wings but are not directly attached to the wing, whereas the direct flight muscles are attached directly to the wing and aid in fine control of its movement. These muscles derive from adepithelial cells associated with the wing disc (Sudarsan et al., 2001; Kozopas and Nusse, 2002).