Sternoclavicular Joint: Difference between revisions
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== Motions Available == | == Motions Available == | ||
== Ligaments and Joint Capsule<br> == | == Ligaments and Joint Capsule<br> == | ||
'''Ligaments:''' | '''Ligaments:''' | ||
*Interclavicular | *Interclavicular: This ligament connects the medial ends of each clavicle with the capsular ligaments and the upper manubrium, which in turn produces a bilateral depression force. This ligament also resists excessive depression or downward glide of the clavicle.<br> | ||
*Costoclavicular | *Costoclavicular: This ligament connects the first rib on either side to the inferior surface of the clavicle. This orientation allows this ligamen to act as the primary restraint for the SC joint. This ligament acts as the fulcrum for elevation-depression and protration-retraction. The ligament also checks clavicular elevation and superior glide of the clavicle.<br> | ||
*Anterior and Posterior Sternoclavicular: | *Anterior Sternoclavicular: This ligament covers the anterior aspect of the joint, running obliquely from the proximal clavicle to the sternum in a downward and medail direction. This ligament checks anterior movement of the head of the clavicle. | ||
*Posterior Sternoclavicular:This ligament covers the posterior aspect of the SC joint. It is weaker than the anterior SC ligament. This ligament checks posterior movement of the head of the clavicle.<br> | |||
'''Joint Capsule:''' | '''Joint Capsule:''' | ||
The SC joint capsule is fairly strong but is dependent on the ligaments noted above for the majority of its support. | |||
== Muscles == | == Muscles == | ||
Revision as of 05:31, 6 February 2009
File:Grays325.jpg
Anterior view sternoclavicular joint.
Description[edit | edit source]
The sternoclavicular joint (SC joint) is formed from the articulation of the medial aspect of the clavicle and the manubrium of the sternum. It is one of four joints that compose the shoulder complex. The SC joint is generally classified as a plane style synovial joint, and has a fibrocartilage joint disk.[1] The ligamentous reinforcements of this joint are very strong, often resulting a fracture of the clavicle before a dislocation of the SC joint.
Motions Available[edit | edit source]
Ligaments and Joint Capsule
[edit | edit source]
Ligaments:
- Interclavicular: This ligament connects the medial ends of each clavicle with the capsular ligaments and the upper manubrium, which in turn produces a bilateral depression force. This ligament also resists excessive depression or downward glide of the clavicle.
- Costoclavicular: This ligament connects the first rib on either side to the inferior surface of the clavicle. This orientation allows this ligamen to act as the primary restraint for the SC joint. This ligament acts as the fulcrum for elevation-depression and protration-retraction. The ligament also checks clavicular elevation and superior glide of the clavicle.
- Anterior Sternoclavicular: This ligament covers the anterior aspect of the joint, running obliquely from the proximal clavicle to the sternum in a downward and medail direction. This ligament checks anterior movement of the head of the clavicle.
- Posterior Sternoclavicular:This ligament covers the posterior aspect of the SC joint. It is weaker than the anterior SC ligament. This ligament checks posterior movement of the head of the clavicle.
Joint Capsule:
The SC joint capsule is fairly strong but is dependent on the ligaments noted above for the majority of its support.
Muscles[edit | edit source]
Closed Packed Position[edit | edit source]
Maximum shoulder elvation
Open Packed Position[edit | edit source]
Open-packed position of the SC joint is when the arm is resting by the side.
Other Important Information[edit | edit source]
Joint Disk:
Resources[edit | edit source]
- Dutton, M. (2008). Orthopaedic: Examination, evaluation, and intervention (2nd ed.). New York: The McGraw-Hill Companies, Inc.
- Levangie, P.K. & Norkin, C.C. (2005). Joint structure and function: A comprehensive analysis (4th ed.). Philadelphia: The F.A. Davis Company.
References
[edit | edit source]
- ↑ Levangie, P.K. and Norkin, C.C. (2005). Joint structure and function: A comprehensive analysis (4th ed.). Philadelphia: The F.A. Davis Company.
