Joint Classifications

Question 1

Fibrous:

Answer 1

No joint cavity

Fibrous connective tissue

Question 2

Cartilaginous

Answer 2

No joint cavity

Cartilage

Question 3

Synovial joint

Answer 3

Joint cavity

•A surrounding articular capsule and often by accessory ligaments.

Question 4

Joints

Answer 4

Functional site where the skeletal and muscular systems interact
•Designed to either promote or limit movement
•Stability and Mobility are influenced by
•The shape of the joint (articular) surface
•The strength of the joint capsule or ligaments
•The strength and orientation of the muscles at the joint
•The greater the mobility the less stability the joint has

Question 5

Joints

Answer 5

Functional site where the skeletal and muscular systems interact
•Designed to either promote or limit movement
•Stability and Mobility are influenced by
•The shape of the joint (articular) surface
•The strength of the joint capsule or ligaments
•The strength and orientation of the muscles at the joint
•The greater the mobility the less stability the joint has

Question 6

Structural classification

Answer 6

based on the presence or absence of a space between the articulation bones (joint cavity) and the type of connective tissue that binds the joint together.

Question 7

Functional classification:

Answer 7

takes into account the degree of mobility the joint allows.

Question 8

Synarthrosis

Answer 8

An immovable joint

Question 9

Amphiarthrosis

Answer 9

A slightly movable joint

Question 10

Diarthrosis

Answer 10

A freely movable joint
•Non-axial
•Uniaxial
•Biaxial
•Triaxial

Question 11

Fibrous Limited to no movement:

Answer 11

Union through Fibrous Tissue
Suture – Skull
Syndesmosis – band spanning distance between two bones – Radius and Ulna or Tibia and Fibula
Gomphosis –the teeth are held in their tooth sockets in the mandible and maxillae like a nail or bolt

Question 12

Cartilaginous

Answer 12

Union is via cartilage which allows some movement.
Epiphyseal plates – growth plates are found in children to allow for growth
Symphysis – grown together intervertebral disc and pubic symphysis
Synchondrosis – links bone and cartilage and bone again – ribs to sternum

Question 13

Synovial Joint

Answer 13

Greatest amount of mobility comes from synovial joints
 Joint capsule – dense connective tissue
 Synovial fluid – in the joint, feeds joint surfaces
 Joint surfaces – hyaline cartilage
 Types
–Gliding (plane)
–Sellar (saddle)
–Spheroidal (ball and socket)
–Trochoid (pivot)
–Condyloid
–Ginglymus (hinge)

Question 14

Examples: Structural Classifications

Answer 14

Uniaxial Joints

Hinge (ginglymus)- Humeroulnar
Pivot (trochoid) – atlantoaxial joint

Question 15

Biaxial

Answer 15

Ball and socket -(Spheroidal)- hip

Gliding (Plane) – intercarpal