Pleural tapping in the mid-axillary line, muscle not pierced is
The transversus thoracis muscle is a thin muscle on the inner surface of the anterior thoracic wall. It doesnot extend till mid axillary line, hence no question of piercing . Image ref- researchgate.net
Internal intercostal
External intercostal
Inner most intercostal
Transversus thoracis
Thorax