What is the anatomical term for the area described as the junction of the sternum and clavicle?

The anatomical term describing the junction of the sternum and clavicle is known as the sternal notch or angle. This area is specifically referred to as the jugular notch, which is located at the superior aspect of the sternum, articulating with the medial ends of the clavicles. This notch serves as an important anatomical landmark in various medical examinations and procedures, aiding healthcare professionals in orienting themselves within the thoracic cavity. The sternal angle, the ridge between the manubrium and the body of the sternum, is also referenced in relation to this area as it serves as a functional landmark for identifying the levels of the ribs and internal organs.

The other terms provided refer to different anatomical areas: the costal margin indicates the lower border of the ribs, the submental region relates to the area under the chin, and the axilla refers to the armpit. Each of these terms describes distinct anatomical locations that are not directly related to the junction of the sternum and clavicle, which is why sternal notch or angle is the most accurate choice in this context.