Anatomical Parts
The infrasternal angle (subcostal angle) is formed in front of thoracic cage by the cartilages of the tenth, ninth, eighth, and seventh ribs, which ascend on either side, where the apex of which the xiphoid process projects.
What is a normal Subcostal angle?
Normally, 1) the transverse diameter of the thorax is greater than its anteroposterior diameter, 2) the subcostal angle (formed at the anterior midline by the imaginary union of the right and left costal arches) is 90 degrees or less, and 3) the ribs descend at about a 45-degree angle from the vertebral column.
What is the angle of rib?
Description. The angle of the rib (costal angle) is the region where the rib is the most strongly bent located on on the proximal part of the body of the rib.
