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- 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
The shoulder's large range of motion is due to its ball-and-socket joint structure, which allows movement in multiple directions. Additionally, the surrounding muscles, tendons, and ligaments provide stability and support during movement. The loose joint capsule allows for flexibility, and the presence of synovial fluid lubricates and reduces friction within the joint, further facilitating motion.
1. 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.
1. 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.
Ball and socket joint, the Glenoid Labrum deepens the cavaty, few reinforcing ligaments, and thin/loose articular cartilage encloses the joint
Shape and size of humeral head, shallowness of glenoid fossa, slack capsule and presence of many tendons around.
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Why does the scapula shoulder blade have broad surfaces?
The broad surfaces of the scapula provide attachment points for muscles that help stabilize and move the shoulder joint. The large surface area also allows for a greater range of motion in the shoulder.
How big can a wasp nest get and what factors contribute to its size?
A wasp nest can grow to be as large as a basketball or even bigger. The size of a wasp nest is influenced by factors such as the species of wasp, the availability of food sources, the climate, and the location of the nest.
Muscle that adducts shoulder and causes extension of the shoulder joint?
The latissimus dorsi muscle is responsible for adducting the shoulder and causing extension of the shoulder joint. It is a large triangular muscle located in the back that helps with various movements of the shoulder and arm.
Why is the shoulder apt to become dislocated?
The shoulder joint is inherently unstable due to its large range of motion and shallow socket, making it more prone to dislocation. Activities that involve forceful impact or extreme range of motion can easily cause the shoulder to dislocate, particularly in individuals with loose ligaments or a history of shoulder dislocations.
What type of joint is your shoulders?
The shoulder joint is a ball-and-socket joint, formed by the head of the upper arm bone (humerus) fitting into a shallow socket within the shoulder blade (scapula). This joint allows for a wide range of motion in multiple directions.
What are the four factor that contribute to the large range of motion at the shoulder?
Ball and socket joint, the Glenoid Labrum deepens the cavaty, few reinforcing ligaments, and thin/loose articular cartilage encloses the joint
Which factors most contribute to footprints being either large or small?
Big feet or small feet.
Why does the scapula shoulder blade have broad surfaces?
The broad surfaces of the scapula provide attachment points for muscles that help stabilize and move the shoulder joint. The large surface area also allows for a greater range of motion in the shoulder.
What two factors may contribute to insecticide resistance?
Large populations and previous exposure to environmental residue are two factors which may contribute to insecticide resistance. Strengthened immune systems can result from interactions with previous applications of the insecticide and from mutants within large numbers of same-generation, same-litter insects.
What is a large flat bone on each side of your back below your shoulder?
shoulder bladeAnswerThe Scapula or shoulder blade.
Which joint listed in the table can be easily dislocated or pulled apart?
The shoulder joint is the joint that can be easily dislocated or pulled apart due to its large range of motion and shallow socket.
What are factors that affect rain?
Factors that affect rain include temperature, humidity, air pressure, and wind patterns. These factors influence the formation of clouds and the subsequent precipitation. Other factors such as topography and proximity to large bodies of water can also contribute to the amount of rainfall in a particular area.
What is the name of the large rounded projection that can be felt on the superior lateral surface of the shoulder?
The name of the large rounded protection on the superior lateral surface of the shoulder is the acromion process. It is a bony structure that can be felt on the top of the shoulder blade.
Two large joints in the body?
Hip and Shoulder
What adjectives describe shoulder blades?
Large, square.
How big can a wasp nest get and what factors contribute to its size?
A wasp nest can grow to be as large as a basketball or even bigger. The size of a wasp nest is influenced by factors such as the species of wasp, the availability of food sources, the climate, and the location of the nest.
What do you do about a large lump on shoulder blade?
Go see the man.
