Question

• Identify a classification of articulation (synarthrosis, amphiarthrosis, diarthrosis).
• Define the classification of the joint
• List an example of at least two bones that form the articulation you identified
• And list at least one accessory structure (ligament, cartilage, etc.) associated with the bones/articulation you identified chose.

Answer 1

Answer:

1. Synarthrosis: Synarthrosis is a type of joint which produces only a very mild movement or it doesn't produce any movement. The bones in the joints are connected by fibrous tissue. It helps to protect the internal organs

Example: Manubriosternal joint, the joint between the manubrium and sternum. It produces only slight movement during the process of respiration

Accessory structure: Fibrocartilage is present in between the joint it helps in assisting movement.

2. Amphiarthrosis: It is a type of joint it has limited amount of mobility. And these joints are connected by Fibrocartilage.

Example: Example of amphiarthrosis joint is joint between two vertebrae it is also known as intervertebral joints.

Accessory structure: The accessory structure which is present between the joint is intervertebral disc. It is made up of Fibrocartilage. And various ligamentous structure gives stability to the intervertebral joints. Some of the ligaments are Anterior longitudinal ligament, Posterior longitudinal ligament, Ligamentum flavum etc.

3. Diarthrosis: It is a synovial joint, the synovial fluid is present between the joint. These joints are freely movable in all direction. These joints provides various movements in the body.

Example: Glenohumeral joint is an example for diarthrosis. This joint is formed by the articulation between glenoid cavity of scapula and humeral head.

Accessory structure: Glenohumeral joint has various stabilising structures they are Glenohumeral ligaments such as superior , middle and inferior Glenohumeral ligament, articular capsule etc.