Joint Structure

Question 1

Name the 2 classifications of joints

Answer 1

• diarthrosis (synovial jt)
• synarthrosis

Question 2

Which classification of joint is mobile?

Answer 2

diarthrosis

Question 3

Synarthroses that have some motion are called ____

Answer 3

amphiarthroses

Question 4

Name the subclassifications of diarthroses by type of movement

Answer 4

• Uniaxial
• Biaxial
• Polyaxial (3 axes)
• Plane (flat jt)

Question 5

What are some examples of uniaxial joints?

Answer 5

• ulnohumeral jt
• proximal & distal radioulnar jts

Question 6

What is an example of a biaxial joint?

Answer 6

radiocarpal jt

Question 7

A hinge joint is an example of what type of diarthrodial joint?

Answer 7

uniaxial

Question 8

A gliding joint is an example of what type of diarthrodial joint?

Answer 8

uniaxial

Question 9

A joint that does flexion, extension, abduction and adduction is an example of what type of diarthrodial joint?

Answer 9

biaxial

Question 10

What are some examples of polyaxial joints?

Answer 10

• shoulder
• hip

Question 11

What are some examples of plane joints?

Answer 11

• zyapophyseal
• patellofemoral
• carpals/tarsals

Question 12

What type of diarthrodial joint has the most motion and least stability relative to other types of joints?

Answer 12

polyaxial (3 axes)

Question 13

What are the subclassifications of synarthrodial joints?

Answer 13

• symphysis
• suture
• synchondrosis
• syndesmosis
• synostosis

Question 14

Describe the structure of a symphysis

Answer 14

fibrocartilage & ligaments

Question 15

Describe the structure of a suture

Answer 15

interdigitating bones with ligamentous connections

Question 16

Describe the structure of a synchondrosis

Answer 16

structures with cartilage ends, but no synovium

Question 17

Describe the structure of a syndesmosis

Answer 17

fibrous connections between bones without cartilage

Question 18

Describe the structure of a synostosis

Answer 18

normal variant or pathological fusion of bones

Question 19

Name an example of a symphysis

Answer 19

• pubic symphysis
• IVDs

Question 20

Name an example of a suture

Answer 20

skull

Question 21

Name an example of a synchondrosis

Answer 21

• manubriosternal
• costochondral

Question 22

Name an example of a syndesmosis

Answer 22

interosseous membrane at:
- tibiofibular jt
- radioulnar jt

Question 23

Name an example of a normal synostosis

Answer 23

5th toe synphalangism (DIP jt fusion)

Question 24

Name an example of a pathological synostosis

Answer 24

SI ankylosis in ankylosing spondylitis

Question 25

What type of synarthrodial joint is technically an amphiarthrosis?

Answer 25

symphysis (should allow limited motion)

Question 26

What type of synarthrodial joint would not be affected by rheumatoid arthritis?

Answer 26

synchondrosis
(no synovium)

Question 27

A high ankle sprain affects what type of joint?

Answer 27

syndesmosis

Question 28

Inflammation of the spine resulting in fusion of joints is an example of what type of joint?

Answer 28

pathological synostosis
(ankylosing spondylitis)

Question 29

A closed physis is called a ____

Answer 29

physeal scar

Question 30

What usually covers the articular ends of synovial joints?

Answer 30

hyaline cartilage

Question 31

What is the term for the ligamentous sleeve that holds a joint together?

Answer 31

joint capsule

Question 32

What is the bare area of a joint?

Answer 32

where synovium ends, bone only