CAMRT Radiography Practice Exam

Which rib is attached at the sternal angle?

1. 2nd rib

2. 1st rib

3. 3rd rib

4. 4th rib

The correct answer is: 2nd rib

The 2nd rib is attached at the sternal angle, which is also known as the angle of Louis. This anatomical landmark is found at the junction between the manubrium and the body of the sternum, and it is significant because it serves as a reference point for locating other structures in the thorax. The 2nd rib articulates with the sternum at this angle, providing an important connection in the ribcage structure. Understanding the attachment of the 2nd rib at the sternal angle also relates to clinical practices, as it can be a guide for locating the aortic arch, bifurcation of the trachea, and the corresponding vertebral level of the thoracic spine. This knowledge is essential for radiographers when positioning patients and interpreting thoracic images accurately. The 1st rib does not have a direct attachment at the sternal angle; instead, it articulates with the manubrium of the sternum. The 3rd and 4th ribs attach to other locations on the sternum, further illustrating why the 2nd rib is uniquely associated with the sternal angle.