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38
Joint function - Coggle Diagram
38
Joint function
Arthrokinematics
- involves rotation of
-bony segments &
-motion of the joint surfaces in relation to one another
- the terms ROLL, SLIDE, & SPIN are used
to describe the motion of the moving parts
- roll: rolling of 1 joint surface over the other
- slide: gliding of 1 component over the other
- spin: rotation of the movable component
- during human joint motion
a combination of sliding & rolling occurs
in order to maintain joint integrity
- the type of arthrokinematics motion depends on
the shape of articulating surface
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ROM
- the amnt of motion available to a joint
within the anatomical limits of the joint structure
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Osteokinematics
- observable movements of the bony levers
in the 3 planes that occur at the joints
- refers to the early joint motions
linear & rotary motions
- flexion, extension
- adduction, abduction
- lateral & medial rotation
- refers to rotary movements of bones in space
during physiological joint motion
Open kinematic chains
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- 1 joint can move independently in the chain
closed kinematic chains
- proximal & distal ends of the joint remain fixed
- movement at 1 joint automatically creates
movement at 1 or more other joints in the chain
- the structure reflects function
- the body is typically modeled as a
multilink system comrising of
several rigid body segments connected by joints
- kinematic chains: composed of a series of rigid links that are interconnected by joints
a series of pin-centered joints