My goal is to help you learn proper weight training and nutrition principles so that you can get strong and build the physique of your dreams! Chest wall pain can be experienced after an increase in activity. The sternum is composed of highly vascular cancellous tissue, covered by a thin layer of compact bone which is thickest in the manubrium between the articular facets for the clavicles. At the lower border, it articulates with the xiphoid process at the xiphisternal joint. Typically, the sternum will break into several pieces — this type of fracture is classified as a comminuted fracture. A shallow costal groove for the passage of blood vessels and a nerve is found along the inferior margin of each rib. Thus, the first piece may have two, three, or even six centers. The manubrium forms the expanded, superior end of the sternum.
Sternal angle: It is the angle formed between the manubrium and body of sternum. Think of it as the little yet very powerful brother of the pactoralis major. It can occur without a known cause or as the result of a lung disease or acute lung injury. It articulates with the manubrium superiorly manubriosternal joint and the xiphoid process inferiorly xiphisternal joint. The chest, as part of this group, enables you to perform pushing actions such as the or a daily activity such as moving a heavy dresser. The rib tubercle articulates with the transverse process of a thoracic vertebra. There are many pics related to Human Shoulder Muscle Anatomy out there.
Lateral to the head is the narrowed neck of the rib. A little below it the lower limit of the great pectoral muscle is seen running upward and outward to the axilla; in the female this is obscured by the , which extends from the second to the sixth rib vertically and from the edge of the sternum to the mid-axillary line laterally. The posterior surface which is slightly concave crossed by transverse ridges similar to those of the anterior surface, but much less prominent, often barely visible. Our team have gallery of Organs Of Circulatory System Anatomy. This condition is known as gynecomastia.
Its anterior surface, convex from side to side, concave from above downward, is smooth, and affords attachment on either side to the sternal origins of the Pectoralis major and Sternocleidomastoideus. They unite with each other after puberty. . The other demifacet lies on the xiphisternum. My name is Alex, and I'm the owner and author of King of the Gym. Patients should address specific medical concerns with their physicians. The sternum consists of the manubrium, body, and xiphoid process.
The second rib attaches to the sternum at the sternal angle. More rarely still the upper end of the sternum may be divided by a. The English term breastbone is actually more like the Latin os pectoris, derived from classical Latin os, bone and pectus, chest or breast. Hope you make use of it. The head of a rib is attached posteriorly to the costal facets of the thoracic vertebrae.
It is absent in both and. Hope you take advantage of it. At the junction of the third and fourth pieces of the body is occasionally seen an orifice, the sternal foramen, of varying size and form. It has a jugular suprasternal notch, a pair of clavicular notches for articulation with the clavicles, and receives the costal cartilage of the first rib. Kritisch-etymologisches medicinisches Lexikon Dritte Auflage. Instead, each rib ends in a costal cartilage. When this takes place, however, the bony tissue is generally only superficial, the central portion of the intervening cartilage remaining unossified.
There are 12 pairs of ribs. This is well seen in some other vertebrates, where the parts of the bone remain separated for longer. Read on and learn more about each chest muscle, and how to properly perform exercises that adequately challenge them. The Greek used στέρνον to refer to the chest, and στῆθος to the breastbone. Congenital sternal foramina can often be mistaken for bullet holes.
Whereas ribs 8-10 are termed false ribs as their costal cartilage articulates with the costal cartilage of the rib above. If you do not agree to the foregoing terms and conditions, you should not enter this site. It is a particularly important anatomical landmark. Anatomy atlas , Cross-sectional anatomy : Thorax Anatomy of the chest: how to visualize anatomic labels This atlas is a comprehensive and affordable learning tool for medical students and residents and especially for radiologists and pneumologists. As part of the bony thoracic wall, the sternum helps protect the internal thoracic viscera — such as the heart, lungs and oesophagus. The ribs are attached posteriorly to the 12 thoracic vertebrae and most are anchored anteriorly either directly or indirectly to the sternum.