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Synovial Joint >>
Joint Mobility >>
osteokinematics | arthrokinematics |
concave-convex rule
Joint Mobility
Osteokinematic movementsĄG
movements between 2 bony segments
synonymĄG physiological movements
types
swingĄG
rotary motion about a fixed
axis at the
proximal segment e.g. knee flexion
spinĄG
axial rotation about a
longitudinal axis
of the distal segment e.g. forearm pronation
description of osteokinematic movements
plane of motion
axis of rotation
degree of freedom
range of motion
open vs. closed kinematic chain
concentric vs.
eccentric contraction
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Arthrokinematic movementsĄG
movements between 2 articular surfaces
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synonymĄG accessory movementsĄF
joint play
types
distraction (traction)ĄG
separation of two articular surfaces along the
longitudinal axis of the distal segment
compressionĄG
meeting together of two articular surfaces along the longitudinal axis of the distal segment
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glideĄG
a combination of roll and slide between two incongruent joint surfaces
rollĄG
new points on one rotating articular surface meet new points on another articular surface
slideĄG
same point on one rotating articular surface meet new points on another articular surface
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In Neumann's book,
three fundamental arthrokinematic movements was classified.
(Neumann 2002, p.8)
rollĄG not really found in human joints
slideĄG not really found in human joints
spin
What if only the roll movement occurs without any slide for the glenohumeral joint?
-- shoulder impingement syndrome
description of arthrokinematic movements
joint morphology to establish
concave-convex rule
plane of motion
direction of motion
amplitude of motion
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Concave-convex rule
concave on convex (concave surface moving on convex surface) movementĄG
The concave articular surface moves in the same direction as the moving bone
Glide
occurs in the same direction as the physiological movement
e.g. tibia on femur motion: knee flexion with posterior glide
convex on concave (convex surface moving on concave surface) movementĄG
The convex articular surface moves in the opposite direction of the moving bone
Glide occurs in the direction opposite to the physiological movement
e.g. humerus on scapula motion: shoulder abduction with inferior glide
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