Joints and Dislocations

Question 1

How many subtypes of joint are there? Name them

Answer 1

3

Fibrous, Cartilaginous, Synovial

Question 2

The more mobility a joint has, the less ___ is has

Answer 2

Stability

Question 3

Some features of fibrous joints and examples?

Answer 3

Low motility, high stability

E.g. coronal suture or unity of tibia and fibula (with fibrous sheet/membrane)

Question 4

Some features of cartilaginous joints and examples?

Answer 4

Medium motility, Medium stability

2 types: primary and secondary

Question 5

Some features of primary cartilaginous joints and examples?

Answer 5

Bones jointed by hyaline cartilage

E.g. femur

Question 6

Some features of secondary cartilaginous joints and examples?

Answer 6

Fibrocartilage

E.g. intervertebral discs

Question 7

Some features of synovial joints?

Answer 7

Where 2 or more bones articulate with each other (via hyaline cartilage)
Capsule around joint and joint cavity formed- supported by ligaments

Question 8

What are the 5 subtypes of synovial joint?

Answer 8

Plane (one plane minimal)
Hinge (one plane reasonable)
Biaxial (2 planes)
Ball and socket (multi-axial)
Pivot (>45 degrees)

Question 9

Definition of subluxation?

Answer 9

Reduced area of contact between articular surfaces

Question 10

Definition of dislocation?

Answer 10

Complete loss of contact between articular surfaces