Upper Quarter 1 Flashcards
What is the classification of the humeroulner and humeroradial joints
Diarthrodial uniaxial hinge joint
What are the joints of the elbow and forearm?
Humeroulnar
Humeroradial
Proximal radioulnar
Distal radioulnar
What are the osseous structures of the humerus?
Supracondylar ridge Epicondyles Olecranon fossa Trochlea Trochlear groove Capitulum
What are the osseous structures of the ulna?
Olecranon process
Trochlear notch
Trochlear ridge
Coronoid process
What are the ligamentous structures of the elbow joint?
Medial (ulnar) collateral ligament
Lateral (radial) collateral ligament
What does the medial collateral ligament of the elbow do?
Resists valgus stress
What does the lateral collateral ligament of the elbow do?
Resists varus stress
What are the three prime flexors of the elbow?
Biceps Brachii
Brachialis
Brachioradialis
What are the two prime extensors of the elbow?
Triceps
Anconeus
What are the motions of the humeroradial and humeroulnar joint?
Flexion
Extension
In Sagittal plane and coronal or M/L axis
Does active or passive ROM allow for more movement?
Passive, due to the bulk of the muscle not contracting.
Which position of the hand allows for greater flexion: supination, pronation, neutral?
Supination
For elbow flexion and extension, is it concave on convex or convex on concave?
Concave on convex
How do you classify the proximal and distal radioulnar joints?
Diarthrodial uniaxial pivot joints
What are the osseous structures of the radius?
Radial head
Ulnar notch
What are the osseous structures of the ulna
Radial notch
Ulnar head
What are the ligamentous structures of the forearm?
Annular ligament
Quadrate ligament
Interosseous membrane
Oblique cord
What does the annular ligament do?
Maintains radial head in radial notch
What does the quadrate ligament do?
Maintains radial head in radial notch
Limits spin of radial head in supination/pronation
What does the interosseous membrane do?
Provides stability for the ulnar joints
Taut in pronation, loose in supination
Transmits forces from distal radius to the ulna and up the chain when compressive forces are applied
What does the oblique cord do?
Prevents separation of the radius and ulna when distractive forces are applies
What are the prime supinators of the forearm?
Biceps Brachii
Supinator
What are the prime pronators of the forearm?
Pronator teres
Pronator quadratus
What are the motions of the forearm?
Supination
Pronation
In the transverse plane and vertical axis
How is ROM of the forearm tested?
With the elbow at 90 degrees
What is the range of active flexion of the elbow
135-140