Joints/Bursea

Question 1

What is a joint?

Answer 1

A point where two bones come together in an articulation

Question 2

What is a synarthrosis joint? What are the three types?

Answer 2

A synarthrosis is a together joint- a place where two bones come together and are separated connective tissue leading to very limited range of motion. Subtypes are:

1. syndesmosis (fibrous joints) like the suture of the skull, 2. synchondrosis (cartilaginous joints) like the epiphyseal plate (growth plate), intervertebral discs and symphysis of the pubic bone.
2. synostosis (two bones joined by bones) where joint existed during development and grew but was replaced by bone upon cessation of growth- such as the frontal bones and epiphyseal plate.

Question 3

What is a diarthrosis joint?

Answer 3

A moveable or synovial joint- have a joint cavity with synovial fluid for joint lubrication, a sleeve-like fibrous capsule, a synovial membrane or sac lining the capsule, and an articular surface coated in hyaline cartilage.

Question 4

What is a hinge joint? Example?

Answer 4

A joint that permits flexion and extension only! Shoulder, elbow, knee etc.

Question 5

What is a ball and socket joint? Example?

Answer 5

The rounded head of one bone fits into a concavity of another, permitting movement on several axis. Hip and head of femur joint.

Question 6

What is a bursae? Example?

Answer 6

Closed sacs of synovial fluid separating bone from overlying tendon or muscle that act to reduce friction between structures. Subacromial bursa.

Question 7

What is arthritis?

Answer 7

Inflammation of a joint

Question 8

What is synovitis?

Answer 8

Inflammation of the synovial membrane of a joint

Question 9

What is bursitis?

Answer 9

Inflammation of the bursa