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28 Cards in this Set
- Front
- Back
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3 joints w/in single capsule
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HUJ
HRJ PRUJ |
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HUJ
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trochlear notch ulna = trochlea of humerus
olecranon process ulna = olecranon fossa humerus coronoid process ulna = coronoid fossa humerus med epi larger than lat epi HUJ = only spin joint in body |
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trochlear articular how many degrees
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300
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trochlear notch orientation
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30-45* = treatment plane
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HUJ carrying angle
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avg - 15* valgus
women larger - hips/pelvis can change over a lifetime esp in years of bone formation |
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cubitus varus
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gunstock deformity
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cubitus valgus
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>20 valgus angle
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HRJ
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concave fovea of rad on convex capitulum of humerus
provides bony buttress to block valgus motion: area of bony injury in ext = valgus ext in flex = varus position |
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PRUJ
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convex rad/concave rad
annular lig pivot joint, 1 DOF |
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DRUJ
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convex ulna, concave rad
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HUJ close pack
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full elbow ext, full sup
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HUJ loose pack
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70 elbow flex, 10* sup
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HRJ close pack
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90* elbow flex, 5* sup
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HRJ open pack
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full ext, full sup
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PRUJ close pack
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5* sup
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PRUJ open pack
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70* flex, 35* sup
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elbow ligaments
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medial ulnar collateral - res valgus (3 bands - anterior, posterior, transverse - taut throughout entire ROM)
lateral ulnar/radial collateral - res varus (least tension @ 90*) annular ligament - keeps radial head on ulna |
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interosseous membrane
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distal IM = good for WB
proximal IM = good for closed chain WB prevents radius from slipping distally w/ gripping weight accepts load and transfers from radius to ulna @ elbow |
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elbow flex
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0-150
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elbow ext
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0
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elbow FROM
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30-130
chair - 20-95 talking on the phone - 130 shoulder will comp when elbow is not capabile |
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elbow end feel
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ext - hard
flex - capsular/soft |
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forearm ROM (PRO/SUP)
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total 160
80 pro 80 sup |
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forearm FROM (pro/sup)
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50 pro
50 sup |
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most ADL forearm ROM
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mostly pronation 20-40
eating w/ a fork -- sup 50-5 pro |
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PRUJ/DRUJ pro
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pruj-roll ant/slide post
druj- roll/slide same direction ==this leads to rad crossing over ulnda (sup is opposite of pro) |
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fixed hand radius moves aronnd ulna
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b/c of trochlear notch
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elbow mm torque/MA/MMT
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most force gen = 80 deg (optimal length tension relationship)
max MA = 100 deg max torque = 90 deg MMT - want them at more than 90 deg to give mechanical adv to you |
