Chapter 11 (Elbow Joint) Flashcards
The elbow joint consists of what bones?
humerus, ulna, radius
Normal ROM in flexion of elbow joint is
145 degrees
T/F
Radius is on the thumb side of hand
True
T/F
Ulna is on the pinky side of hand
True
Normal ROM in extension of elbow is
0 degrees
what are the 4 elbow joints?
- Humeroulnar joint
- humeroradial joint
- superior or proximal radioulnar joint
- inferior or distal radioulnar joint
Humeroulnar joint and humeroradial
uniaxial hinge joint
ROM 0-145
moves in sagittal plane
superior or proximal radioulnar joint and Inferior or distal radioulnar joint
- uniaxial pivot joint
- moves in transverse plane
- motions are supination ROM 90 degrees
- pronation ROM 80 degrees
- radius rotates around ulna
Can the ulna rotate?
The radius moves around the ulna, The ulna does not rotate at all it is locked in place.
What is carrying angle?
- longitudinal axes of humerus and forearm form an angle.
- Greater in woman 10-15 degrees
- men 5 degrees
What are the bony landmarks on scapula that move the elbow joint
- supraglenoid tubercle- (above) attaches long head of bicep
- Infraglenoid tubercle -(below) attaches long head triceps
- Coracoid process- attaches short head bicep
What are the bony land marks of humerus?
- trochlea -capitulum
- medial epicondyle -lateral epicondyle
- olecranon process
Describe the trochlea
- medial side articulates with ulna
- sits inside end of ulna “scoop part”
Describe the capitulum
lateral side articulates with radial head
Describe the medial epicondyle
pronator teres attachment
Attachment for Anconeus and supinator
Lateral epicondyle