attached to prealar apophysis mesothoracic sternal apodeme flight control muscle indirect flight muscle mesothoracic pleurosternal muscle 2022-07-05T13:30:44Z furcoentopleural muscle FBbt:00058914 fly_anatomy.ontology Indirect flight control muscle that is involved in generating tension in the thorax, controlling wing beat frequency (Dickinson and Tu, 1997). There are two of these muscles on each side and they originate on the mesofurca and insert on the ventral surface of the prealar apophysis (Dickinson and Tu, 1997).