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What are 4 factors that contribute the large range of motion of the shoulder?
Wiki User
∙ 11y ago
- This joint has more freedom of movement that any other joint in the body.
- This freedom results from the laxity of the joint's articular capsule and the large size of the humeral head compared the small size of the glenoid cavity.
- The shoulder articulation is a multiaxial ball-and-socket joint that allows movements around three axes and permits flexion-extension, abduction-adduction, circumduction, and rotation.
- In circumduction, the distal end of the humerus describes the base of a cone, the apex of which is the head of the humerus
Wiki User
∙ 12y ago
Wiki User
∙ 12y ago1. Rounded head of the humerus fits into a shallow glenoid cavity of the scapula(shape and depth).
2. articular capsule enclosing the joint is thin and loose contributing to ease of movement.
3. few ligaments reinforce the shoulder allowing a large range of motion.
4.It's a ball and socket joint which provides the most flexability to a joint.
Wiki User
∙ 11y ago1. The joint is a ball and socket joint, which allows the humerus to rotate and flex in all directions.
2. The socket of the joint is very shallow, which gives a greater range of motion than a deep socket.
3. There are muscles attaching to the bones on both sides from all angles, allowing for the muscles to pull the joint in almost any direction.
4. There are no collateral bones around the joint - the arm is actually held to the body by tendons and muscles rather than ligaments and bones.
Wiki User
∙ 15y agoBall and socket joint, the Glenoid Labrum deepens the cavaty, few reinforcing ligaments, and thin/loose articular cartilage encloses the joint
Wiki User
∙ 12y agoShape and size of humeral head, shallowness of glenoid fossa, slack capsule and presence of many tendons around.
Wiki User
∙ 12y agoBecause the shoulder joint is formed from a ball-and-socket joint which is the only multiaxial joint (this joint is found in the shoulders and hips.)
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