1.5.1 Joints of the Upper Extremity Flashcards
What are the three types of joints by formation?
Fibrous joint
Cartilaginous joint
Synovial joint
What are the three joints of the pectoral girdle?
Sternoclavicular, acromioclavicular, and glenohumeral
Describe the location of the Sternoclavicular joint.
The sternal end of the clavicle with the manubrium of the sternum and the 1st costal cartilage
The SC joint in divided into two compartments by an _______ which is fixed to the fibrous articular capsule and the ______.
Articular disc; interclavicular ligament
What are the ligaments of the SC joint?
Interclavicular ligament and costoclavicular ligament
What is more common, an SC joint dislocation or clavicle fracture?
Clavicular fracture
What is the blood supply to the SC joint?
Internal thoracic and suprascapular arteries
What is the nerve innervation of the SC joint?
Medial supraclavicular (C3 and C4)
Describe dislocation and ankylosis?
What are the ligaments of the AC joint?
AC ligament
Coracoclavicular ligament - Conoid ligament and trapezoid ligament
What is the purpose of the coracoclavicular ligament?
The coracoclavicular ligament not only strengthens AC joint, but also suspends scapula from clavicle and strengthen the coracoid process from downward force of muscle attachments.
Describe the movement of the scapula
What is the blood supply to the AC joint?
Suprascapular and thoracoacromial arteries
What is the Nerve supply to the AC joint?
What is a should separation vs a shoulder dislocation?
Shoulder separation - AC joint dislocation plus coracoclavicular ligament is broken
Shoulder dislocation - humeral head dislocated from the glenoid cavity
Describe an AC Joint Dislocation (shoulder separation)
KEY INFORMATION: Describe the AC Joint Isolation. Mainly Tossy Classification.
What are the basic characterisitics of the glenohumeral joint?
The glenoid cavity is deepened by the ______ which is ______.
Glenoid labrum; ring like fibrocartilaginous structure
What are the muscles that keep the humeral head in the glenoid cavity?
SItS
Supraspinatus
Infraspinatus
teres minor
Subscapularis
In regards to the glenohumeral joint, how do the medial, lateral and superior aspects of the joints compare to the inferior?
The articular capsule of the glenohumeral joint have two openings, what are they and what are they used for?
What is the role of the transverse humeral ligament?
Runs from the greater tubercle to the lesser tubercle of the humerus bridging over the synovial sheath for the tendon of the bicep.
What are the major shoulder flexors?
Pectoralis major, deltoid, coracobrachialis and bicep
What are the major shoulder extensors?
Latissimus dorsi and deltoid
What are the major shoulder abductors?
Supraspinatus for 1st 15 degrees
Then it is the deltoid muscle
What are the major shoulder adductors?
Pectoralis major, lat dorsi, and rotator cuff muscles