Shoulder Flashcards
Review this diagram of the portions of the proximal humerus.
What bones define the region of the shoulder?
Clavicle
Scapula
Proximal Humerus
What joints define the region of the shoulder?
Sternoclavicular
Acromioclavicular
Glenohumeral
Review this diagram of the scapula
What is the only bony attachment between the trunk and the upper limb?
Clavicle
What type of joints allow fo movement?
Synovial Joints
Where does the sternoclavicular joint lie?
Between the proximal end of the clavicle and the clavicular notch of the manubrium
What type of joint is the sternoclavicular joint? What is it shaped as?
Synovial
Saddle-shaped
What does the acromioclavicular joint articulate with?
Acromion and Clavicle
Review this diagram of the acromioclavicular joint
What type of join is the glenohumeral joint?
Synovial ball and socket articulation
What does the head of the humerus articulate with?
The glenoid cavity of the scapula
What type of movement does the glenohumeral joint allow for?
Multiaxial movements
Review this radiograph of the shoulder.
Which superficial muscle elevates the shoulder and rotates the scapula?
Trapezius
What does the deltoid allow movement of?
Abduction of arm beyond initial 15 degrees
Which muscles are responsible for movements of the shoulder and glenohumeral joint integrity?
Rotator cuff muscles
Actions of the infraspinatous
- Laterally rotates the shoulder
- Adducts shoulder
- stabilizes head of the humerus in the glenoid cavity
Which muslce initiates the first 15 degrees of abduction?
Supraspinatous
Origin of the subscapularis
Anterior
Where does the subscapularis insert into?
Lesser Tubercle of the humerus
What actions does the subscapularis allow for (2 actions)
- Medially rotate shoulder
- Stabilize head of humerus in glenoid
Where is the Subacromial-Subdeltoid Bursa located?
Deep in the deltoid muscle
Review this diagram of the glenohumeral joint
What is the major artery that supplies to the arm?
Axillary
Radiograph showing tuberosity
Yet another radiograph. Knock yourself out
Diagram of the lateral view of the scapula
Weakest portion of the humerus and the most common place of fracture
Surgical Neck
Origin and insertion of the subscapularis
Origin: Anterior
Insertion: Lesser tubercle of humerus
