Bones and Joints of the Upper Extremity Flashcards
What are the bones of the upper extremity?
humerus
radius
ulna
1/2 sphere, proximal end that articulates with the glenoid fossa to form GH joint is called what?
Head of the humerus
What are the fossae of the humerus?
radial
coronoid
olecranon
sulcus for ulnar nerve
What does the head of the radius articulate with?
The capitulum of the humerus
What fossa does the head of the radius fit into and where is it?
Radial fossa on anterior humerus
Where is the neck of the radius?
immediately distal to the head
Where is the radial/bicipital tuberosity?
distal to neck, anterior medial side in anatomical position.
Where is the pronator tubercle?
middle lateral surface of the radius
Where is Lister’s (dorsal) tubercle?
Posterior middle surface of distal radius
What are the grooves of the radius?
lateral to dorsal tubercle
medial to dorsal tubercle
What are the borders of the radius?
anterior
posterior
interosseus
Where is the radial styloid process?
distal lateral aspect
What forms the bony elbow?
olecranon process
What does the olecranon process articulate with?
olecranon fossa of the humerus
What is the anterior aspect of the olecranon?
trochlear notch
What does the trochlear notch articulate with?
trochlea of the humerus
What is the anterior inferior aspect of the trochlear notch?
coronoid process
What does the coronoid process articulate with?
coronoid fossa
What does the radial notch of ulna articulate with?
radial head
Where is the ulnar tuberosity?
on anterior surface of the ulna
What are the borders of the ulna?
anterior
posterior
interosseus
Where is the head of the ulna?
distal end
What does the distal end of the ulna articulate with?
articular cartilage
What are the bones of the carpals?
scaphoid
lunate
triquetrum
pisiform
trapezium
trapezoid
capitate
hamate
Which carpals articulate with the distal radius?
scaphoid
lunate
What are the articulating surfaces of the radiohumeral joint?
concave surface of radial head and capitulum of humerus
What are the articulating surfaces of the ulnohumeral joint?
trochlear notch of the ulna and trochlea of the humerus
What movements are permitted by the ulnohumeral and radiohumeral joints? What axis and plane?
flex/ex
medial lateral axis
sagittal plane
What are the ligaments of the radiohumeral and ulnohumeral joints?
capsule
medial/ulnar collateral
lateral/radial collateral
What is the shape of the medial/ulnar collateral ligament?
triangular shaped
what does the medial/ulnar collateral ligament limit?
valgus motion
What is the shape of the lateral/radial collateral ligament?
fan shaped
What does the medial/ulnar collateral ligament attach?
attaches medial humeral epicondyle to coronoid and olecranon process
What does the lateral/radial collateral ligament attach?
attaches lateral humeral epicondyle to annular ligament of proximal radioulnar joint
What motion does the lateral/radial collateral ligament limit?
varus motion
What is the classification of the radiohumeral and ulnohumeral joint?
uniaxial hinge synovial joint
What nerves innervate the radiohumeral and ulnohumeral joints?
musculotaneous
radial
ulnar
What are the articulating surfaces of the proximal radioulnar joint?
edge of radial head
radial notch of ulna
How much of the radial head articulates with the ulna at any one time?
1/5
What is the classification of the proximal radioulnar joint?
uniaxial pivot synovial joint
What are the movements of the proximal radioulnar joint (with axis and plane)?
supination and pronation
mechanical axis
no plane
What are the ligaments of the proximal radioulnar joint?
capsule
annular ligament
oblique cord
What nerves innervate the proximal radioulnar joint?
musculocutaneous
radial
ulnar
What are the bursae of the elbow?
olecranon bursae
(subtendonous and subcutaneous)
What are the fat pads of the elbow?
anterior and posterior fatpads
What are the articulating surfaces of the middle radio ulnar joint?
Interosseus border of the radius and ulna
What is the classification of the middle radio ulnar joint?
Fibrous syndesmosis, amphiarthrodial joint
What movements are permitted by the middle radioulnar joint?
Supination/pronation
What are the ligaments of the middle raioulnar joint?
Interosseus membrane
What movement does the interosseus membrane limit?
Supination and pronation
What are the articulating surfaces of the distal radioulnar joint?
Head of ulnar
Ulnar notch of radius
What is the classification of the distal radioulnar joint?
Uniaxial pivot synovial joint
What are the movements permitted by the distal radioulnar joint?
Supination - pronation
What are the ligaments of the distal radioulnar joint?
Capsule
Ant. and post. radioulnar lig
Triradiate cartilage/disc
What movement does the ant./post. radioulnar ligament limit?
Anterior limits supination.
Posterior limits pronation
What movement does the triradiate cartilage/disc limit?
Cushions impact between between carpals and radius and ulna.
What nerves innervate the distal radioulnar joint?
Anterior (median) and posterior (radial) interosseus nerves.
What are the articulating surfaces of the radiocarpal joint?
Distal radius and tricolor cartilage (concave)
Proximal row of carpal- scaphoid, lunate (and triqutrum in extreme ulnar deviation. (Convex)
What is the classification of the radiocarpal joint?
Biaxial condyloid synovial joint
What are the movements of the radiocarpal joint?
Flex/ex:
med/lat. axis; sag. plane
Radial/ulnar deviation:
Ant/post axis; frontal plane