Elbow flash cards
Classify the ulnohumeral joint according to type and complexity
Synovial
compound
Classify the ulnohumeral joint according to shape and degrees of motion
modified sellar
1 degree
Osteokinematics (mechanical axis) of ulnohumeral jt
vertical axis through length of ulna
Osteokinematics of ulnohumeral jt (available movements and axis of movement)
Flex/extn - sagittal plane, transverse axis
Conjunct adduction with flexion and slight ER
conjunct abduction with extension and slight IR
Arthrokinematics of ulnohumeral jt (for each movement)
Flexion- ant glide with conjunct lateral glide (add)
Extension- post glide with conjunct medial glide (abd)
Describe the shape of the trochlea of humerus
convex ant/post
concave med/lat
oblique orientation- med project more distally creating carrying angle
Describe the shape of the trochlear notch of the ulna
reciprocally curved
describe the anterior capsule
broad and thin
attach above medial epicondyle and above the coronoid and radial fossa
attaches below to annular ligament
describe the posterior caosule
Thin
above is attached to humerus behind capitulum
inferomedially to olecranon
laterally continuous with capsule of RU jt
Where are the fat pads?
4 intracapsular
btw radius and ulna
btw capsule and synovial membrane x3
purpose to cover small non-articulating areas of bone
describe the medial ligaments
ulnar (medial) collateral lig
anterior (primary stabiliser of medial elbow)
posterior and oblique transverse band
neurology articular supply (segmental, Peripheral)
Segmental C5-T1
Peripheral
median nerve branches- anterior capsule
ulnar nerve branches supply UCL and posteromedial capsule
musculocutaneous branches supply anterior capsule
radial nerve branches supply post and anterolateral caosule, triceps, anconeus
arterial supply
collateral branches of brachial artery anastomose
branches of radial and ulna arteries
Describe the articular surface of capitulum of humerus
rounded capitulum is convex
describe the articular surface of radial head
cup like fovea
concave
What are the medial ligaments
Radial (lateral) collateral ligs
Describe the articular surface of the of Radial head
convex
describe the articular surface of radial notch of the ulna head
concave
what are the ligaments involved in the sup RU jt
annular
Ulnohumeral end feel
flexion- soft tissue approximation of bony
extension- bony
capsular pattern (UH jt)
more limitation of flexion than extension
resting position (UH jt)
70d flex and med-position to slight pronation
close pack position (UH jt)
full ext
classify the radiohumeral jt (type and complexity)
synovial
compound
classify radiohumeral joint (shape and degree of motion)
unmodified ovoid but functions as a modified ovoid due to annular lig and interosseous membrane
2 deg motion
radiohumeral jt osteokinematics- mechanical axis
oblique vertical axis through the length of radius
Osteokinematics of radiohumeral jt (available movements and axis of movement)
flex/ext
swing in saggital plane in oblique transverse axis
Pro/Sup
spin in transverse plane about oblique vertical axis
Arthrokinematics of radiohumeral jt (for each movement)
Flexion ant glide of radial head on capitulum extension post glide of radial head on capitulum pro/sup spin (internal/external)
superior radioulnar jt classification (type and complexity)
synovial
compound
superior radioulna jt classification shape and degree of motion
modified ovoid but functions as modified sellar due to interossius membrane
1 degree of motion
osteokinematics of superior radioulnar jt (mechanical axis)
oblique longitudinal (vertical) axis through distal end of ulna to centre of capitulum
osteokinematics of superior radioulna jt (available movements and axis of movement)
pronation/supination
swing in transverse plane about oblique vertical axis
superior radioulna jt arthrokinematics (for each movement)
pronation
posterolateral glide of radial head on ulna
supination
anteromedial glide of radial hea don ulna
