42 Questions
What type of joint is the Scapulothoracic joint?
Physiological joint
Which joint provides a moveable base for the humerus, increasing the range of motion at the shoulder joint?
Scapulothoracic joint
Which movement of Scapula involves abduction away from the midline of the spine?
Protraction
What role does the Scapulothoracic joint play in overhead work?
Provides glenohumeral stability
What type of movement involves upward sliding on the ribcage, such as shrugging the shoulders?
Elevation
Which of the following shoulder movements would cause the scapula to rotate upwards?
Flexion of Arm
In upward rotation of the scapula, what happens to the glenoid cavity?
It rotates superiorly
The sternoclavicular joint is a...
Saddle synovial joint
How many degrees of freedom does the SC joint have (sternoclavicular joint)?
3
Which joint provides the moveable base for the humerus and helps absorb shocks to outstretched arms?
Scapulothoracic joint
Which joint allows downward rotation with concave and convex articular surfaces?
Sternoclavicular joint
Which joint is described as a planar synovial joint with subtle movement?
Acromioclavicular joint
Which ligament of the SC joint prevents the clavicle from moving superiorly?
Costoclavicular ligament
Which structure deepens the glenoid cavity to make articular surfaces congruent?
Glenoid labrum
Which ligament of the SC joint is considered extrinsic?
Interclavicular ligament
Which movement of the SC joint has the largest ROM?
Elevation
Which ligaments prevents superior dislocation of AC (acromioclavicular) joint?
Coracoclavicular ligaments
Which bursa facilitates movements of the supraspinatus tendon?
Subacromial bursa
Which joint movements include elevation, depression, protraction, retraction, and rotation of the clavicle?
Sternoclavicular joint movements
Which of these ligaments wraps around the tendon of the long head of biceps?
Transverse humeral ligament
What is the range of horizontal adduction at the shoulder joint?
140 degrees
In which axis does rotation of the shoulder joint occur?
Longitudinal axis of the humerus
What is the range of flexion at the shoulder joint?
180 degrees
The final position of flexion can be reached by how many degrees of abduction?
180 degrees
What muscles are involved in horizontal abduction at the shoulder joint?
Posterior deltoid, Infraspinatus, Teres major and minor, Rhomboid muscles, Trapezius, Latissimus dorsi
What is the position of reference for measuring the range of transverse movements of the shoulder joint?
90 degrees abduction of shoulder in the frontal plane
At what degree does lateral rotation occur at the shoulder joint?
80 degrees
What is the range of horizontal abduction at the shoulder joint?
30 degrees
At what degree does medial rotation occur at the shoulder joint?
90 degrees
What is the position of the forearm to measure the range of movements of rotation at the shoulder joint?
Forearm lying in a sagittal plane with the elbow bent at 90 degrees
The articular surfaces of the GH joint are covered by ______ cartilage. (what type of cartilage?)
The head of the humerus has great congruency with the glenoid fossa
False
Glenoid labrum is composed of fibrocartilage that attach to the margins of the glenoid cavity
True
Short head of biceps is involved in horizontal adduction
True
Bursae serve to decrease ______ between muscle and joint capsule
Coracohumeral ligament connects the coracoid process to the......
Greater tubercle of the humerus
The coracohumeral ligament serves to keep the biceps tendon in its groove during any GH movement
False
What direction are shoulder dislocations most common in?
Inferior
Which nerve is most likely to be damaged with shoulder dislocation?
Axillary nerve
Which of these ligaments supports the GH joint anteriorly?
All of the above
Which of these ligaments supports the GH superiorly?
Coracoacromial ligament
The GH is supported posteriorly by the ______ muscles
Study Notes
Shoulder Joint Anatomy and Physiology
- Sternoclavicular joint allows downward rotation, with concave and convex articular surfaces
- Supportive ligaments include sternoclavicular, interclavicular, and costoclavicular ligaments
- Joint movements include elevation, depression, protraction, retraction, and rotation of the clavicle
- Acromioclavicular joint is a planar synovial joint with subtle movement
- Ligaments of the AC joint include acromioclavicular, trapezoid, and conoid ligaments
- Glenohumeral joint is a ball and socket synovial joint with three degrees of freedom
- Glenoid labrum deepens the glenoid cavity to make articular surfaces congruent
- GH joint capsule attaches to the glenoid cavity and anatomical neck of humerus
- GH joint ligaments include capsular, transverse humeral, and coracohumeral ligaments
- Coracoacromial arch is formed by the smooth inferior aspect of the acromion and coracoid processes
- Rotator cuff muscles are fused to the joint capsule, except for the biceps
- Bursae around the GH joint, including subscapular, subacromial, and subdeltoid bursae, protect underlying tendons and muscles
Test your knowledge of shoulder joint anatomy and physiology with this quiz! Explore the intricate details of sternoclavicular, acromioclavicular, and glenohumeral joints, along with ligaments, movements, and supportive structures.
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