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Quiz 6: Sternoclavicular, Acromioclavicular, and Glenohumeral joints
Terms in this set (64)
Movement of the shoulder involves all of the following joints:
1. Acromioclavicular joint
2. Sternoclavicular joint
3. Glenohumeral joint
4. Physiological scapulothoracic joint
What is the only bony articulation between the upper limb and axial skeleton?
If you saw a patient cradling their arm what would you suspect?
Dislocated Acromioclavicular joint the patient will also have a dropped shoulder
Sternoclavicular joint is what type of joint
The sternoclavicular joint is a saddle joint but it can act like what kind of joint?
ball and socket joint
The sternoclavicular joint is completely divided by an
The sternoclavicular joint is often dislocated. True or False
False; it is rarely dislocated because of its strong ligaments
What are the motions of the sternoclavicular joint?
rotation around axis of clavicle
What is special about the acromioclavicular joint
it is the the only bony attachment of the scapula to the trunk
The acromioclavicular joint is ___ to the humerus.
The acromioclavicular joint is ____ to the coracoid process.
This ligament helps form a "roof" over the joint preventing the head of the humerus from being pushed upward when the weight of the body is supported by the upper limb
The acromioclavicular joint is what type of joint?
The acromioclavicular joint is incompletely separated by a _____
The acromioclavicular joint is surrounded by a fibrous capsule which is strengthened superiorly by the _______
What are the motions of the acromioclavicular joint?
rotation of the scapula on the clavicle
anterior -posterior motion
Why on a radiograph is there a space between the clavicle and the acromion process?
because the articular disc of the acromioclavicular joint does not show up well in radiographs
What are the parts of the coracoclavicular ligament?
1. Conoid ligament
2. Trapezoid ligament
What does a patient present with when their acromioclavicular joint is dislocated?
1. Dropped shoulder
2. cradling arm or their arm is in a sling
What does the conoid ligament connect
The coracoid process and the conoid tubercle on clavicle
What does the Trapezoid ligament connect?
The coracoid process and the trapezoid line on clavicle
The angle of the plane of the acromioclavicular joint is not horizontal but slanted so that
the clavicle runs over the acromion process
What ligament can be torn during contact sports or severe fall on the shoulder?
This ligament holds the long tendon of the biceps brachii muscle in the biccipital groove
transverse humeral ligament
Ligaments of the acromioclavicular joint?
2. Coracoacromial ligament
With protraction and retraction the scapula elevates slightly. True or False
False; with protraction/retraction the scapula only moves around thoracic cavity.
Since the sternoclavicular joint is very strong the ___ would snap rather than the joint being injured.
What is the most commonly dislocated large joint of the body?
The glenohumeral joint is commonly dislocated
Another name for the Glenohumeral ligament
Function of glenoid labrun
Glenoid labrum is ring of fibrocartilage (strongest cartilage) that increases stability of glenohumeral joint by deepening the glenoid fossa.
The fibrous capsule is lined with a
The fibrous capsule of the glenohumeral joint is attached to
the margins of the glenoid labrum and to the anatomical neck of the humerus
The capsule is relatively thin and hangs in a fold when the arm is _____.
What are the extrinsic ligaments of the shoulder?
1. Coracoclavicular ligament- conoid ligament and trapezoid ligament
3. Transverse humeral
Function of the coracoacromial ligament
forms a "roof" over the joint preventing the head of the humerus from being pushed upward when the weight of the body is supported by the upper limb
Function of transverse humeral ligament
holds the tendon of the long head of the biceps brachii muscle in the biccipital groove
What bursas prevent friction as the deltoid and supraspinatus muscles pull across the joint
Subdeltoid bursa and subacromial bursa
The _____holds the head of the humerus to the glenoid fossa during movements of the joint.
On the anterior, posterior, and superior aspects of the joint, the capsule is reinforced by the insertions of the ____
tendons of the rotator cuff muscles
Intrinsic shoulder ligaments
1. Coracohumeral ligament
2. Glenohumeral (Z) ligament
What does the coracohumeral ligament connect?
runs from the base of the coracoid process to the anterior surface of the greater tubercle of the humerus
What ligament reinforces the anterior part of the glenohumeral joint?
Glenohumeral ligament (Z)
True or false: There is some bone to bone contact in the glenohumeral joint.
How many bands does the glenohumeral ligament have
Where is the z ligament?
consists of 3 band that run from the superior aspect of the glenoid labrum to the capsule as it inserts on the anatomical neck of the humerus
What are the three different bands of the glenohumeral ligament?
What are the protrusions of the synovial membrane?
synovial sheath of the tendon of the long head of the biceps brachii muscle
The subscapular bursa prevents friction between the tendon of the
subscapularis muscle and the neck of the scapula
What two bursa are located between the shoulder joint and the deltoid and supraspinatus muscles.
What two bursas do not communicate with the joint capsule?
Subacromial bursa and subdeltoid bursa
The scapulothoracic joint is not a _______,
What is the scapulothoracic joint?
mobile muscular attachment of the scapula to the thoracic wall
What are the muscles that make up the physiological scapulothoracic joint?
2. latissimus dorsi
3. Levator scapulae
4. Rhomboid minor
5. Rhomboid major
7. Serratus anterior
Inflammation of the bursa between the scapula and the muscles of the scapulothoracic joint is called______
Snapping shoulder syndrome
Odd ligament that connects two parts of the same bone.
Coracoacromial ligament: connects the acromion and coracoid processes
The transverse humeral ligament is a common place for
Suprapsinatus ____ to glenohumeral joint
Infraspinatus and teres minor is _____ to glenohumeral joint
Subscapularis is _____ to glenohumeral joint
Coracohumeral ligament is ____ to glenohumeral joint
Glenohumeral ligament is ______ to glenohumeral joint
How does an inferior dislocation of the glenohumeral joint occur?
forcefully abducting the arm above 120 degrees and the head of the humerus goes down
Biccipital apponeurosis in between
biceps and deep fascia
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