What is the name of the upper quarter of the sternum?

The upper quarter of the sternum is known as the manubrium. The manubrium is a broad, flat piece of bone that forms the top portion of the sternum. It plays a crucial role in connecting the sternum to the clavicle and the first ribs, providing structural support and stability to the upper rib cage. This anatomical area is important for various functions, including enabling respiratory movement and protecting the heart and major blood vessels situated beneath it.

The other parts of the sternum include the body and the xiphoid process, both of which are lower portions. The clavicle, while also an important bone in the structure of the thoracic region, is not a part of the sternum itself, as it connects the arm to the trunk. Understanding these anatomical distinctions helps in grasping the overall framework of the thoracic skeleton and its functions.