Maximus Gage
The arrangement of tendinous insertion and pennation of the muscle fascicles (fibres) within the muscle gaster determines the overall mechanical advantage that each articulation provides for the kinematics of movement for the body. The kinematic chain is the linking of the articulations of the body that leads to the desired movement. There are two types of kinematic chain: open and closed. An open chain is where the distal (terminal) end of the chain is free to move and the proximal (initial) segment of the chain is fixed. A closed chain will have both the distal (terminal) end and the proximal (initial) segment of the chain fixed. The motion that is allowed by the articulations interactions with the muscles follows the physical principles of levers.
| Characteristics | Values |
|---|---|
| Kinematic chain | The linking of the articulations of the body that leads to the desired movement |
| Lever system | The arrangement of tendinous insertion and pennation of the muscle fascicles (fibers) within the muscle gaster summate to determine the overall mechanical advantage that each articulation provides for the kinematics of movement for the body |
| Open chain | The distal (terminal) end of the chain is free to move and the proximal (initial) segment of the chain is fixed |
| Closed chain | Both the distal (terminal) end and the proximal (initial) segment of the chain are fixed |
| Dynamic articulations | Primarily within ball and socket joints (especially the glenohumeral joints) |
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What You'll Learn
The kinematic chain
In the kinematic chain, you can either have an open chain or a closed chain. The open chain is where the distal (terminal) end of the chain is free to move and the proximal (initial) segment of the chain is fixed. A closed chain, on the other hand, has both the distal (terminal) end and the proximal (initial) segment of the chain fixed. The motion that is allowed by the articulations interactions with the muscles follows the physical principles of levers. Based on where the muscles insert on the bone, three basic lever systems are developed, all of which provide a level of mechanical advantage to the articulation allowing for movement to occur.
Additionally, there is a distinct class of articulations known as dynamic articulations. Dynamic articulations are seen primarily within ball and socket joints (especially the glenohumeral joints). These joints form due to the interaction of capsular ligaments with the tendons of the rotator muscles of the joint. They provide the ability to have changing levels of tension and capsular stability via the interaction between ligamentous and tendinous units. That occurs by changes in tension about the central axis of the capsular ligament and thus modifies the degree of motion that can be obtained throughout the entire range of motion of the articulation.
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Lever systems
The arrangement of tendinous insertion and pennation of the muscle fascicles (fibers) within the muscle gaster determines the overall mechanical advantage that each articulation provides for the kinematics of movement for the body. The motion that is allowed by the articulations interactions with the muscles follows the physical principles of levers.
Based on where the muscles insert on the bone, three basic lever systems are developed, all of which provide a level of mechanical advantage to the articulation allowing for movement to occur.
The first lever system is the open chain, where the distal (terminal) end of the chain is free to move and the proximal (initial) segment of the chain is fixed. The second lever system is the closed chain, where both the distal (terminal) end and the proximal (initial) segment of the chain are fixed. The third lever system is the dynamic articulation, where the interaction of capsular ligaments with the tendons of the rotator muscles of the joint provides the ability to have changing levels of tension and capsular stability.
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Dynamic articulations
The kinematic chain is the linking of the articulations of the body that leads to the desired movement. In the kinematic chain, there can be an open or closed chain. An open chain is where the distal (terminal) end of the chain is free to move, and the proximal (initial) segment is fixed. A closed chain has both the distal (terminal) end and the proximal (initial) segment fixed.
The motion that is allowed by the articulations' interactions with the muscles follows the physical principles of levers. Based on where the muscles insert on the bone, three basic lever systems are developed, all of which provide a level of mechanical advantage to the articulation, allowing for movement to occur.
The arrangement of tendinous insertion and pennation of the muscle fascicles (fibres) within the muscle gaster summate to determine the overall mechanical advantage that each articulation provides for the kinematics of movement for the body.
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Open and closed chains
The kinematic chain is the linking of the articulations of the body that leads to the desired movement. In the kinematic chain, you can either have an open chain or a closed chain.
In an open chain, the distal (terminal) end of the chain is free to move, while the proximal (initial) segment of the chain is fixed. This means that the movement is allowed by the articulations' interactions with the muscles, following the physical principles of levers.
On the other hand, a closed chain has both the distal (terminal) end and the proximal (initial) segment of the chain fixed. Closed chains also follow the physical principles of levers, but the movement is more restricted compared to an open chain.
Based on where the muscles insert on the bone, three basic lever systems are developed, all of which provide a level of mechanical advantage to the articulation, allowing for movement to occur.
Dynamic articulations are a distinct class of articulations seen primarily within ball and socket joints, especially the glenohumeral joints in the shoulder. These joints form due to the interaction of capsular ligaments with the tendons of the rotator muscles of the joint, providing changing levels of tension and capsular stability.
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Muscle fascicles
The kinematic chain can be open or closed. In an open chain, the distal (terminal) end of the chain is free to move, while the proximal (initial) segment is fixed. In a closed chain, both the distal and proximal ends are fixed. The motion that is allowed by the articulations interactions with the muscles follows the physical principles of levers.
Based on where the muscles insert on the bone, three basic lever systems are developed, all of which provide a level of mechanical advantage to the articulation, allowing for movement to occur. The arrangement of the muscle fascicles within the muscle is an important factor in determining the overall mechanical advantage of the articulation.
Additionally, there is a distinct class of articulations known as dynamic articulations, which are seen primarily within ball and socket joints, especially the glenohumeral joints. These joints form due to the interaction of capsular ligaments with the tendons of the rotator muscles of the joint, providing the ability to have changing levels of tension and capsular stability via the interaction between ligamentous and tendinous units.
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Frequently asked questions
A kinematic chain is the linking of the articulations of the body that leads to the desired movement.
The two types of kinematic chain are open and closed. In an open chain, the distal (terminal) end of the chain is free to move and the proximal (initial) segment of the chain is fixed. In a closed chain, both the distal (terminal) end and the proximal (initial) segment of the chain are fixed.
Dynamic articulations are seen primarily within ball and socket joints, especially the glenohumeral joints.
The motion that is allowed by the articulations' interactions with the muscles follows the physical principles of levers. Based on where the muscles insert on the bone, three basic lever systems are developed, all of which provide a level of mechanical advantage to the articulation allowing for movement to occur.
One example of a muscle articulation is the shoulder (glenohumeral).
