Types of Joint

Question 1

What are two types of solid (immoveable) joints?

Answer 1

Fibrous + cartilaginous

Question 2

What is the only category of moveable (cavitated joint)?

Answer 2

Synovial (6 different types)

Question 3

Pivot (synovial)

Answer 3

A rounded bone fits into a ring of bone/cartilage, allows for rotation, eg. atlantoaxial joint in head/neck

Question 4

Planar (synovial)

Answer 4

Between flat surfaces, allows gliding movements back and forth eg. acromioclavicular

Question 5

Ball + socket (synovial)

Answer 5

Ball shaped bone fits into cup like depression, allows for internal/external rotation, flexion/extension, abduction/adduction (+ circumduction (when talking about shoulder)) eg. glenohumeral or acetabulofemoral joint

Question 6

Hinge (synovial)

Answer 6

Convex surface fits into concave, allows for flexion and extension in a singular plane eg. ulnohumeral joint

Question 7

Ellipsoid/condyle (synovial)

Answer 7

Oval shaped condyle fits into elliptical cavity, allows for flexion/extension, abduction/adduction and circumduction eg. radiocarpal

Question 8

Saddle (synovial)

Answer 8

‘Saddle and rider’ shapes fit together, allows for flexion/extension, abduction/adduction eg. carpometacarpal (thumb)

Question 9

What is a fibrous joint (+ example)?

Answer 9

Little/no movement and fibrous tissue holds articulating bones eg. in the skull

Question 10

What is a cartilaginous joint (+ example)?

Answer 10

Little/no movement and cartilage holds articulating bones eg. intervertebral discs

Question 11

What is a synovial joint?

Answer 11

Has a synovial cavity and can freely move