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I this its the following:
Bursae
- located between skin and bones, tendons and bones, muscles and bones, or ligaments and bones
- Main function: reduce friction between joints
Joint Capsule
- surrounds a synovial joint and encloses the synovial cavity
- Main function: unite the articulating bones and reduce friction via production of synovial fluid
A bursa is a fluid-filled sac that acts as a cushion between bones, tendons, and muscles to reduce friction and allow smooth movement. The joint capsule, on the other hand, is a fibrous structure that surrounds a joint and helps stabilize it by maintaining its structural integrity. While bursae reduce friction in specific areas, joint capsules provide overall support and protection to the entire joint.
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What is bursa surface fraying?
Bursa surface fraying refers to degeneration or wear and tear of the bursa, a small fluid-filled sac that acts as a cushion between bones and tendons near a joint. This condition can cause pain, swelling, and inflammation in the affected area, impacting joint movement and function. Treatment may include rest, ice, anti-inflammatory medications, and physical therapy.
What is capsular damage?
Capsular damage refers to an injury or impairment of the joint capsule, a structure made up of ligaments that surrounds and stabilizes a joint. This can occur due to trauma, injury, or overuse, leading to pain, swelling, and limited joint mobility. Treatment typically involves rest, physical therapy, and in severe cases, surgery may be needed to repair the damaged capsule.
Fluid filled sacs in the knee?
The fluid-filled sacs in the knee are called bursae. They help reduce friction between moving structures in the joint. Inflammation of these bursae can lead to a condition called bursitis, causing pain and swelling in the affected area.
What is the difference between a mobile joint and rigid joint?
A mobile joint allows for movement between connected bones, while a rigid joint does not allow for movement. Mobile joints are found in areas like the shoulders and hips, whereas rigid joints are found in areas like the skull.
What is the type of joint found between the first and second vertebrae of the neck region or the backbone?
The type of joint found between the first and second vertebrae of the neck region, or the backbone, is called the atlantoaxial joint. It allows for rotation and flexion of the neck.
What is a capsule made up of tough fibrous connective tissue and filled with synovial fluid?
A joint capsule is made up of tough fibrous connective tissue that surrounds a joint and is filled with synovial fluid. This fluid helps to lubricate the joint, reducing friction between the bones during movement.
What is the outermost part of a synovial joint?
The outermost part of a synovial joint is the joint capsule. This capsule is a tough, fibrous structure that surrounds the joint and helps provide stability. It also secretes synovial fluid, which lubricates the joint and nourishes the cartilage within.
What bursa does not belong to the glenohumeral joint?
The subscapular bursa does not belong to the glenohumeral joint. It is located between the subscapularis tendon and the neck of the scapula, within the shoulder joint but not directly associated with the glenohumeral joint.
What does the fluid-filled sac do?
A fluid-filled sac, such as a bursa or a synovial joint capsule, acts as a cushion to reduce friction between moving parts of the body. It helps to lubricate joints and facilitate smooth movement.
What is the difference between neuroma and Capsulitis?
Neuroma is a tumor made of nerve tissue. Capsulitis is inflammation of the joint capsule, typically in the shoulder.
Where is bursa found near the shoulder area?
The bursa near the shoulder area is typically found between the acromion (bony prominence on the shoulder blade) and the rotator cuff tendons. This bursa is known as the subacromial bursa and helps reduce friction between the bones and tendons during shoulder movement.
What is a flattened sac that reduces friction between adjacent structures during joint activity called?
Bursa
What is the most important and most commonly injured bursa of the shoulder joint?
The subacromial bursa is both the most important bursa in the shoulder joint for reducing friction and the most commonly injured. Inflammation of this bursa, known as subacromial bursitis, can cause pain and restricted motion in the shoulder.
What is subacrominal bursa and subcoracoid bursa?
The subacromial and subcoracoid bursa are spaces composed of synovium membrane (which generally lines the inside of joint capsules) and synovial fluid a fluid which is found in joint and bursa and is designed to be as frictionless as possible. The subacromial bursa is located above the shoulder joint between the supraspinatus muscle and below the acromiom which comes off the spine of the scapula and may be palpated as the bony apex of the shoulder. This bursa does not communicate with the shoulder joint proper. This is not the case if there is underlying pathology however. The subcoracoid bursa is also called the subscapular bursa. It is in fact a medial continuation of the shoulder joint. In other words it is part of the shoulder joint cavity and sits underneath the coracoid process. The coracoid process is also part of the scapula and can be palpated beneath the lateral (outer part) of the clavicle.
Which type of articulation has a joint capsule?
A synovial joint has a joint capsule. This capsule surrounds the joint and is lined with a membrane that secretes synovial fluid, which helps reduce friction and provide nutrients to the joint.
Why is it important for a bursa to be located between movable bones?
A bursa acts as a cushioning and lubricating structure that reduces friction and allows for smooth movement between bones. Having a bursa between movable bones helps to prevent wear and tear on the joint surfaces, decreasing the risk of pain, inflammation, and injury.
How does a bursa differ from a synovial cavity of a joint?
No bone
