The<unk>  (singular:<unk>  (Infracostales) consist of muscular and aponeurotic fasciculi, which are usually well-developed only in the lower part of the thorax; each originates from the inner surface of one rib , and is inserted into the inner surface of the second or third rib above, near its angle.
Their fibers run in the same direction as those of the Intercostales interni.
Subcostales muscle
Internal intercostal muscles
Intercostal muscle
External intercostal muscles
Levatores costarum muscles
Splenius capitis muscle
Diaphragm 
Papillary muscle