Types Of Joints

Question 1

Three types of joints are?

Answer 1

Fibrous, cartilaginous, synovial

Question 2

Describe fibrous joints

Answer 2

Held together by fibrous connective tissue(immovable in relationship to one another)

Question 3

Describe cartilaginous joints

Answer 3

Held together by cartilage; very little movement

Question 4

Describe synovial joints

Answer 4

main type of joint, most moveable, not held together as firmly, has fibrous joint capsule

Question 5

4 examples of fibrous joints are?

Answer 5

Syndesmosis, suture, interosseous membrane, gomphosis

Question 6

2 examples of cartilaginous joints are?

Answer 6

Hyaline, fibrocartilaginous

Question 7

Syndesmosis joints are about 4 to 5 mm long and hold two ____ together.
Give an example?

Answer 7

parallel

Distal tibiofibular joint

Question 8

Suture joints are about 1 mm or less with a jagged edge. An example would be?

Answer 8

The 20 bones of the skull

Question 9

Interosseus membrane holds _______ together to help them _______
More simply, it is a membrane between bones.
Example?

Answer 9

Bones
Work together
Where the tibia and fibula are held together.

Question 10

Gomphosis example?

Answer 10

Where are teeth are held in their sockets.

Question 11

Describe hyaline (cartaliginous)

Answer 11

Embryonic ‘“synchondrosis” held together by hyaline; growth plates, sternum and first rib; found during development when still growing; eventually ossifies resulting in no movement.

Question 12

Fibrocartilaginous joints example?

Answer 12

Intervertebral disk, pubic symphysis; some movement possible.

Question 13

Capsule of a synovial joint function

Answer 13

Most defining feature, covers ends of bones, tough membranous surrounding coat

Question 14

Synovial membrane of a synovial joint function

Answer 14

Lines joint capsule and other bony surfaces. It is not an articulating surface, secretes synovial fluid (lubricant,) that is consistency of egg whites.

Question 15

Hyaline cartilage(SOMETIMES found in synovial joints) function

Answer 15

Decreases friction, lines ends of bones. articulating surface in a normal joint. In 90% percent of synovial joints and protects from injury

Question 16

Collateral ligament (SOMETIMES found in synovial joints) function

Answer 16

On outside surface of joint capsule, usually a thickening. Makes union between bones stronger.

Question 17

Intraarticulating disk (SOMETIMES found in synovial joints) function
Example?

Answer 17

Between bony articulating surfaces. If present, cushions change the shape of articulating surfaces, changes movement.
Meniscus of knee

Question 18

Intracapsular joint ligament (SOMETIMES found in synovial joints) function?
Examples?

Answer 18

Ligaments within the capsule

ACL AND PCL

Question 19

Extrascapular joint ligament (SOMETIMES found in synovial joints) function

Answer 19

At a distance from joint. Strengthens union

Question 20

Shapes and types of synovial (diarthroses) joints

Answer 20

Plane joints
Ball and socket joints
Ellipsoid(condyloid) joints
Hinge joint
Pivot joint
Saddle Joint

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Question 21

Plane joint description and example

Answer 21

Permit gliding(primarily side to side and back and forth)
Example: articular process to articular process of vertebrae; intercarpal and intertarsal joint

Question 22

Ball and Socket joint description and example

Answer 22

Convex surface fits into concave surface. These joints are triaxial or multiaxial because they prevent three degrees of freedom. (flexion/extension, adduction/abduction, rotation)
Glenohumeral joint

Question 23

Ellipsoid joints (condyloid) description and example

Answer 23

Variation of ball and socket. ROM is restricted to two directions (biaxial,) permits flexion/extension and adduction/abduction but not rotation.
Example: metacarpophalangeal joint

Question 24

Hinge joint description and examples

Answer 24

Movement only in 1 axis (uniaxial)

Example: humeroulnar joint, elbow, knee) only allows flexion and extension

Question 25

Pivot joint description and example.

Answer 25

One bone rotates on long axis of 2nd bone (i.e pronation and supination at radioulnar joint (forearm) also atlanto-axial joint (Dens of C2 articulates with C1

Question 26

Saddle joint

Answer 26

“Like a saddle and a rider” less free movement. Concavits matches with convexity or vice-versa
Example: metacarpal of thumb