Articular System

Question 1

Three Types of Joints

Answer 1

• Fibrous
  -Cartilaginous
  -Synovial

Question 2

Ball & Socket Joint

Answer 2

“Ball” of one bone fits into the “socket” of another allowing movement around 3 axis
(Humerus rests on glenoid cavity)

Question 3

Gliding

Answer 3

Connects flat or curved surfaces that glide against one another
(Between the tarsals and among the carpals)

Question 4

Hinge Joint

Answer 4

A convex portion of one bone fits into the concave portion of another

(Joint between Ulna and Humerus)

Question 5

Pivot Joint

Answer 5

Round point of a bone fits into a groove of another
(First two vertebrae in the neck which allows movement of the head)

Question 6

Saddle Joints

Answer 6

Movement in two planes Carpo metacarpal articulation of the thumb

Question 7

Ellipsoid Joint

Answer 7

Movement in two planes
(Wrist)

Question 8

Dislocations

Answer 8

Bone is dislocated from its joint
(common in finger or shoulder joints)

Question 9

Seperation

Answer 9

More serious than dislocated- In a shoulder the clavicle and scapula are disrupted

Question 10

Osteoarthritis

Answer 10

Loss of cartilage at joints

Question 11

Rotator Cuff Tears

Answer 11

1 or all 4 muscles making up the rotator cuff at the should joint
- When apart of the tendon is torn all 3 muscles around the joint are effected