TraumaĪn injury to the chest from a motor vehicle accident or fall may cause sternum popping pain. While there is no direct cause for the popping in the chest, researchers believe the sound may be linked to several factors. It may also originate from the sternocostal joints between the first seven ribs and the sternum. The sternum protects the lungs, heart, and blood vessels as it forms the front portion of the ribcage.Ī popping sternum produces sound from the sternoclavicular joint region in the chest, located between the collarbone and the sternum. Its thin, pointed shape gives it its name, a Greek word for sword-shaped. The xiphoid process forms the lower section of the sternum bone. The body narrows at the bottom for the xiphoid process. It is also referred to as the gladiolus and forms notches for cartilage attachment for the third to sixth ribs. The body is the long middle section of the sternum. The sternal angle joins the manubrium to the âbodyâ portion of the sternum. The top of the manubrium has a concave notch at its highest point, visible as a depression at the bottom of the neck. The trapezoid-shaped manubrium is the upper portion of the sternum. Located in the middle of the chest, the sternum has three main sections. The sternum is commonly known as the flat, T-shaped breastbone.
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