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46 Cards in this Set
- Front
- Back
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What is the carrying angle in males and females?
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10 degrees in males
up to 15 degrees in females |
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what type of joint is the elbow joint?
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hinge joint
flexion/extension |
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Ulnar collateral ligament, the anterior is?
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strongest, stiffest, resists valgus/abduction- taut in full extension
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posterior ulnar collateral ligament is taut in full??
what does it resist? |
flexion
-valgus |
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Transverse ulnar collateral ligament is poorly?
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developed
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Radial/lateral collateral ligaments is less difined with annular ligament, it resists ____ force and distraction
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Varus/adduction
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the Joint capsula emcompasses all 3....
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proximal joints
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Intracapsular air pressure is lowest at?
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80 degrees of flexion
position of comfort |
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HUMEROULNAR JOINT
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HUMEROULNAR JOINT
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joint surfaces of the humeroulnar joint?
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humerus convex, ulna concave
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How many degrees of freedom for the humeroulnar joint?
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1 degree of freedom
flexion: ulnar rolls and slides anterior 2. extension- ulnar rolls and slides posterior |
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what is the closed pack position?
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full extension and full supination
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Extension of the humeroulnar joint, from 0-5 degrees of hyperextension the olecranon enters the.....
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olecranon fossa
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the order of muscle recruitment for the humeroulnar joint is?
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anconeus
medial head triceps lateral head triceps long head triceps |
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Flexion at the humeroulnar joint is at 145 degrees, muscles that flex the elbow are?
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1.brachialis- greatest force in any position
2. brachioradialis- longest, minial effect on pron/sup 3. Biceps- 2 joint muscle. flexion advantage in supination -shoulder flexion moment must be countered by posterior deltoid |
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HUMERORADIAL JOINT
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HUMERORADIAL JOINT
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what type of joint is humeroradial joint?
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hinge
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joint surfaces are?
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superior radial head concave
capitulum on humerus convex Roll and Slide are the SAME AS HUMEROULNAR JOINT |
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Colsed pack position is?
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90 degrees flexion w/ 5 degrees supination
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PROXIMAL AND DISTAL RADIOULNAR JOINTS
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-
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what type of joints are they?
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uniaxial pivot joint (spins proximally
Pronation- 75-80 degrees supination-85-90 degrees |
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Activities of daily living requires about _____ degrees total ROM of pronation and supination
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100
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greater arc of motion at _____ radioulnar joint compared to _____
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distal
proximal |
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proximal radioulnar joint-
joint surfaces are? |
head of radius is convex
notch of ulna is concave |
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closed pack position in proximal radioulanr joint is full?
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full extension w/ 5 degrees supination
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Annular ligament is covered with articular cartilage and lots of??
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mechanoreceptors
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Distal radioulnar joint-
Joint surfaces are? |
concave ulnar notch of radius
convex head of the ulna |
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The ulna stays fixed as the radius _____.
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rotates
concave on convex= SAME DIRECTION |
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what is the closed pack position of the distal radioulnar joint?
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5 degrees supination
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TFCC(triangular fibrocartilaginous complex)
contents are? |
articular disc, capsular ligament, and UCL wrist
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If the TFCC has a tear there will be pain and decreased stability in what type of motions?
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pronation/supination
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what are the stabilizers of the distal RU joint?
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ulnocarpal complex (TFCC)
joint capsule pronator quadratus tendon ECU IOM |
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Supination of RU joint-
Proximally: radial head spins in ________ on radial notch. |
annular ring
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Distally: concave (radius) rolls and slides in the _____ direction, laterally, on convex ulna.
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same
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End of range supination stretches?
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palmar capsular ligament
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main mover of supination of the RU joint?
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supinator
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Biceps is a strong supinator at ____ degrees elbow flexion.
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90
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Pronation of RU joint
Proximally: radial spins inside?? |
annular ligament
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Distal pronation radius rolls and slides ____ at distal RU joint.
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medially
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wrist/hand is attched to what bone
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radius
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end range of pronation stretches?
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dorsal capsular ligament
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main movers os pronation of RU joint is?
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pronator teres and pronator quadratus
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interosseus membrane connects?
it provides surface area for? it is a _____ transmission. fibers run mostly ____ in a superior lateral direction from ulna to radius.. |
ulna and radius
-muscle attachment -force -oblique |
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interosseus membrane cont..-
when UE made into a weight bearing joint, how do forces travel thru wrist ? |
80% thru radiocarpal joint
20% thru TFCC to ulna |
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Nursemaids/pulled elbow
-radial head subluxation from under ______ ligament. -can relocate by _____ and ____ palm upward. |
annular ligament
-flexing, rotate |
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Elbow dislocation-
requires a lot of? ulna slides _____ to distal humerus. |
force
- posterior |
