Joint Classification

Question 1

fibrous jts =

Answer 1

synarthroses

Question 2

cartilaginous jts =

Answer 2

amphiarthroses

Question 3

synovial jts =

Answer 3

diarthroses

Question 4

types of fibrous jts (synarthroses)

Answer 4

• suture
• syndesmosis
• gomphosis

Question 5

types of cartilaginous jts (amphiarthroses)

Answer 5

• synchondrosis

- symphysis

Question 6

types of synovial jts (diarthroses)

Answer 6

• uniaxial jt
• biaxial jt
• multi-axial jt

Question 7

describe fibrous jts

Answer 7

• bone united by fibrous tissue
• nonsynovial
• minimal to no movement

Question 8

describe cartilaginous jts

Answer 8

• hyaline cartilage or fibrocartilage connects one bone to another
• slightly moveable

Question 9

describe synovial jts

Answer 9

• free movement between bones
• most complex and vulnerable to injury
• classified by type of movement and shape of articulating bones

Question 10

5 distinguishing characteristics of synovial jts

Answer 10

1. joint cavity
2. articular cartilage
3. synovial membrane
4. synovial fluid
5. fibrous capsule

Question 11

eventual fusion of suture is called

Answer 11

synostosis

Question 12

What is a suture?

Answer 12

union of two bones by a ligament or membrane

Question 13

What is a syndesmosis?

Answer 13

• bone connected to bone by dense fibrous membrane
• very little motion

*interosseous membrane (tib/fib)

Question 14

What is a gomphosis?

Answer 14

• peg in hole

- tooth in socket

Question 15

synchondrosis examples

Answer 15

true rib articulation

sternum

Question 16

symphysis

Answer 16

• generally at midline of body
• two bones covered by hyaline cartilage or fibrocartilage
• slight motion

*pubic symphysis

Question 17

synovial: uniaxial jt

Answer 17

one motion around a single axis in one plane

• hinge (elbow)
• pivot (atlantoaxial)

Question 18

synovial: biaxial jt

Answer 18

movement in two planes and around two axes through convex/concave surfaces

• condyloid (MCP jt)
• saddle (CMC jt of thumb)

Question 19

synovial: multi-axial jt

Answer 19

movement in 3 planes and around 3 axes

• plane (gliding)- carpals
• ball and socket (hip)