Sternum Flashcards
What is the role of the sternum?
Protect organs of torso such as heart and lungs.
What are the three main parts of a sternum?
- Manubrium
- Body
- Xiphoid process
What are the main joints of the sternum?
- Sternomanubrial joint
- Sternoclavicular joint
- Sternocostal joint
What type of joint is the sternomanubrial joint?
Secondary cartilaginous joint (symphysis)
What is the vertebral level of the sternomanubrial joint?
T4
What type of joint is the sternoclavicular joint?
Synovial saddle joint
What is unique about the sternoclavicular joint
The only joint that directly connects the upper trunk of the appendicular skeleton to the axial skeleton of the trunk
What innervates the the sternoclavicular joint?
Medial supraclavicular nerve, nerve to subclavius
What provides blood supply to the sternoclavicular joint?
Suprascapular artery, internal thoracic artery
What are the movements of the sternum?
Elevation - depression
Protraction - retraction
Axial rotation
What type of joint is the sternocostal joint?
Synovial plane joint
The first sternocostal joint is an exception, what type of joint is it?
Primary cartilaginous joint
What provides innervation to the sternocostal joint?
Intercostal nerve
What provides blood supply to the sternocostal joint?
Internal thoracic artery
What is the movement of the sternocostal joint?
Sternochondral joint 1: almost no movement
Sternochondral joints 2-7: translation, mainly superinferiorly
