During pleural tapping in the midaxillary line, which of the following muscles is not pierced?
Transversus thoracis is not pierced duirng pleural tapping. Transversus thoracis originates from the lower third of the posterior surface of the sternum, Xiphoid process and costal cailages of lower 3-4 true ribs. It inses into the cailage of the 2nd to 6th rib. It lies anteriorly, not in the mid-axillary line and hencce doesnot get piierced during pleural tapping. It is also called triangularis sternae or sternocostalis. The innermost muscular plane has three named muscles: Innermost intercostals are at the sides of the rib cage. Subcostalis are at the back. Transversus thoracis at the anterior pa of the thoracic rib cage. Ref: Gray&;s Anatomy 41st edition Pgno: 941
External intercostal
Internal intercostal
Innermost intercostal
Transversus thoracis
Thorax