Ch3 - Classification of Joints in Human Body

Question 1

Suture

Answer 1

(fibrous) tight union unique to the skull.

Question 2

Syndesmosis

Answer 2

(Fibrous) Interosseous membrane between bones. Ex: the union along the shafts of the radius and ulna, tibia and fibula, and distal tibiofibular joint.

Question 3

Gomphosis

Answer 3

Unique joint at the tooth socket.

Question 4

Primary (synchondroses; hyaline cartilaginous)

Answer 4

(Cartilaginous) usually temporary to permit bone growth and typically fuse (ex: epiphyseal plates); some do not (ex: at the sternum and rib with costal cartilage).

Question 5

Secondary (symphyses; fibrocartilaginous

Answer 5

(Cartilaginous) Strong, slightly moveable joints (ex: intervertebral discs, pubic symphysis)

Question 6

Plane (arthrodial)

Answer 6

(Synovial) Gliding and sliding movements(ex: acromioclavicular joint)

Question 7

Hinge (ginglymus)

Answer 7

Uniaxial movements (ex: elbow extension and flexion)

Question 8

Ellipsoidal (condyloid)

Answer 8

Biaxial joint (ex: radiocarpal extension, flexion at the wrist)

Question 9

Saddle (sellar)

Answer 9

Unique joint that permits movements in all planes, including opposition (ex: the carpometacarpal joint of the thumb)

Question 10

Ball and Socket (enarthrodial)

Answer 10

Multiaxial joints that permit movement in all directions (ex: hip and shoulder joints).

Question 11

Pivot (trochoidal) Bicondylar

Answer 11

Uniaxial joints that permit rotation (ex: proximal radioulnar and atlantoaxial joints). Allow movements primarily around one axis with some limited rotation in a second axis (ex: knee flexion and extension with limited internal and external rotation).