Arthrokinematics: Difference between revisions
(New page: '''Arthrokinematics '''refers to the movement of joint surfaces. The angular movement of bones in the human body occurs as a result of a combination of rolls, spins, and slides. A '''...) |
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'''Arthrokinematics '''refers to the movement of joint surfaces. | '''Arthrokinematics '''refers to the movement of joint surfaces. | ||
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The angular movement of bones in the human body occurs as a result of a combination of rolls, spins, and slides. | |||
The angular movement of bones in the human body occurs as a result of a combination of rolls, spins, and slides. | |||
A '''roll '''is a rotary movement, one bone rolling on another. | A '''roll '''is a rotary movement, one bone rolling on another. | ||
A '''spin '''is a rotary movement, one body spinning on | A '''spin '''is a rotary movement, one body spinning on another. | ||
A '''slide '''is a translatory movement, sliding of one joint surface over another. | |||
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The '''convex-concave rule''' is the basis for determining the direction of the mobilizing force when joint mobilization gliding techniques are used to increase a certain joint motion. | The '''convex-concave rule''' is the basis for determining the direction of the mobilizing force when joint mobilization gliding techniques are used to increase a certain joint motion. | ||
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The direction in which sliding occurs depends on whether the moving surface is ''concave ''or ''convex''. | The direction in which sliding occurs depends on whether the moving surface is ''concave ''or ''convex''. | ||
'''Concave '''= hollowed or rounded inward | '''Concave '''= hollowed or rounded inward | ||
'''Convex '''= curved or rounded outward | |||
If the moving joint surface is CONVEX, sliding is in the OPPOSITE direction of the angular movement of the bone. | |||
If the moving joint surface is CONCAVE, sliding is in the SAME direction as the angular movement of the bone. | |||
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Examples: | |||
*'''Glenohumeral articulation: '''''concave ''glenoid fossa articulates with the ''convex ''humeral head | |||
''Glenhumeral posterior glide increases flexion and internal rotation'' | |||
''Glenhumeral anterior glide increases extension and external rotation'' | |||
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*'''Humeroradial articulation'''''':''' ''convex ''capitulum articulates with the ''concave ''radial head | |||
''' | ''Dorsal or posterior glide of the head of radius'' ''increases elbow extension'' | ||
''Volar or anterior glide of the head of the radius increases elbow flexion'' | |||
*'''Hip joint: acetabulum articulates with the ''convex ''femoral head | |||
''Hip posterior glide increases flexion and internal rotation'' | |||
''Hip anterior glide increases extension and extenral rotation'' | |||
'' | *'''Tibiofemoral articulation:''' ''concave ''tibial plateaus articulate on the ''convex ''femoral condyles | ||
'' | ''Tibiofemoral posterior glide increases flexion'' | ||
''Tibiofemoral anterior glide increases extension'' | |||
''' | *'''Talocrural joint'''''':''' ''convex ''talus articulates with the ''concave '' | ||
'' | ''Talocrural dorsal or posterior glide increases dorsiflexion'' | ||
'' | ''Taocrural ventral or anterior glide increases plantarflexion'' |
Revision as of 05:09, 26 April 2011
Arthrokinematics refers to the movement of joint surfaces.
The angular movement of bones in the human body occurs as a result of a combination of rolls, spins, and slides.
A roll is a rotary movement, one bone rolling on another.
A spin is a rotary movement, one body spinning on another.
A slide is a translatory movement, sliding of one joint surface over another.
The convex-concave rule is the basis for determining the direction of the mobilizing force when joint mobilization gliding techniques are used to increase a certain joint motion.
The direction in which sliding occurs depends on whether the moving surface is concave or convex.
Concave = hollowed or rounded inward
Convex = curved or rounded outward
If the moving joint surface is CONVEX, sliding is in the OPPOSITE direction of the angular movement of the bone.
If the moving joint surface is CONCAVE, sliding is in the SAME direction as the angular movement of the bone.
Examples:
- Glenohumeral articulation: concave glenoid fossa articulates with the convex humeral head
Glenhumeral posterior glide increases flexion and internal rotation
Glenhumeral anterior glide increases extension and external rotation
- 'Humeroradial articulation': convex capitulum articulates with the concave radial head
Dorsal or posterior glide of the head of radius increases elbow extension
Volar or anterior glide of the head of the radius increases elbow flexion
- Hip joint: acetabulum articulates with the convex femoral head
Hip posterior glide increases flexion and internal rotation
Hip anterior glide increases extension and extenral rotation
- Tibiofemoral articulation: concave tibial plateaus articulate on the convex femoral condyles
Tibiofemoral posterior glide increases flexion
Tibiofemoral anterior glide increases extension
- 'Talocrural joint': convex talus articulates with the concave
Talocrural dorsal or posterior glide increases dorsiflexion
Taocrural ventral or anterior glide increases plantarflexion