20 Questions
Which boney landmarks make up the proximal radioulnar articulation?
Head of the radius and the radial notch of the ulna
What type of joint is the radiocarpal articulation?
Condyloid
What movements are allowed at the radiocarpal articulation?
Flexion/extension, radial and ulnar deviation, circumduction
What type of joint is the intercarpal articulation?
Planar (gliding)
What movements are allowed at the carpometacarpal articulation?
Flexion/extension, abduction/adduction, circumduction, opposition and reposition
What type of joint is the metacarpophalangeal articulation?
1st MCP - hinge joint, MCP 2-5 condyloid joints
What movements are allowed at the metacarpophalangeal articulation?
1st MCP - flexion/extension, MCP 2-5 - flexion/extension, abduction/adduction, circumduction
What type of joint is the interphalangeal articulation?
Hinge joints
What movements are allowed at the interphalangeal articulation?
Flexion/extension
What type of joint is the glenohumeral joint?
Ball and socket
Which bones make up the glenohumeral joint?
The head of the humerus and the glenoid fossa of the scapula
Which ligament prevents excessive external rotation in the glenohumeral joint?
Glenohumeral ligaments
How many ligaments form the glenohumeral ligaments?
Three
Which ligament holds the tendon of the long head of the biceps brachii muscle in place?
Transverse humeral ligament
Which ligament forms the coracoacromial arch and helps prevent superior displacement of the humeral head?
Coracoacromial ligament
What structures make up the coracoacromial arch?
Coracoid process, coracoacromial ligament, and acromion
What is the function of the subacromial bursa in the glenohumeral joint?
It is a communicating bursa between the acromion and the supraspinatus tendon
What is the function of the subscapular bursa in the glenohumeral joint?
It is a communicating bursa between the tendon of subscapularis and the joint capsule
What bones are involved in the humeroulnar articulation?
Trochlea of the humerus and the trochlear notch of the ulna
What type of joint is the humeroulnar articulation?
Hinge
Study Notes
Proximal Radioulnar Articulation
- The proximal radioulnar articulation is formed by the head of the radius and the radial notch of the ulna.
Radiocarpal Articulation
- The radiocarpal articulation is a condyloid joint.
- It allows for movements such as flexion, extension, radial deviation, and ulnar deviation.
Intercarpal Articulation
- The intercarpal articulation is a plane synovial joint.
Carpometacarpal Articulation
- The carpometacarpal articulation is a plane synovial joint.
- It allows for movements such as flexion, extension, and circumduction.
Metacarpophalangeal Articulation
- The metacarpophalangeal articulation is a condyloid joint.
- It allows for movements such as flexion, extension, abduction, and adduction.
Interphalangeal Articulation
- The interphalangeal articulation is a hinge joint.
- It allows for movements such as flexion and extension.
Glenohumeral Joint
- The glenohumeral joint is a ball-and-socket joint.
- It is formed by the humerus and the scapula.
- The ligament that prevents excessive external rotation in the glenohumeral joint is the anterior glenohumeral ligament.
- The glenohumeral ligaments consist of three ligaments: the anterior, middle, and posterior glenohumeral ligaments.
- The ligament that holds the tendon of the long head of the biceps brachii muscle in place is the transverse humeral ligament.
- The ligament that forms the coracoacromial arch and helps prevent superior displacement of the humeral head is the coracoacromial ligament.
- The coracoacromial arch is formed by the coracoid process, the acromion, and the coracoacromial ligament.
- The subacromial bursa in the glenohumeral joint reduces friction between the deltoid muscle and the acromion.
- The subscapular bursa in the glenohumeral joint reduces friction between the subscapularis muscle and the scapula.
Humeroulnar Articulation
- The humeroulnar articulation is a hinge joint.
- It is formed by the trochlea of the humerus and the trochlear notch of the ulna.
Test your knowledge on the glenohumeral joint and its ligaments with this quiz. Answer questions about the bones involved and describe the functions of the glenohumeral ligaments.
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