Articular System Flashcards
0
Q
How many ways can joints be categorized as? And what are they?
A
- Congruency mobility: diarthroses, amphiarthroses, synarthroses
- Binding tissues: fibrous, cartilaginous, synovial
1
Q
Diarthroses
A
- More mobility, less stability
- Loose binding tissues, poor congruency
- Ex: arm
- Exception is the knee, good binding and good congruency
2
Q
Amphiarthroses
A
- In between diarthroses and synarthroses in a continuum
2. Ex: knee joint, elbow
3
Q
Synarthroses
A
- Least mobile, most stable
- Taught binding tissue, good congruency
- Ex: skull
4
Q
Arthrokinematics
A
What happens within a joint
Small joint motion
5
Q
Osteokinematics
A
How bones move in relation to one another
Abduction/Adduction
6
Q
Axis of rotation
A
Imaginary rod passing through center of joint
7
Q
Describe the joint motions
A
- Spinning: rotation. Axis of rotation doesn’t change but the binding position can change.
- Translation: gliding. Axis of rotation moves in one line.
- Rolling: turns and has a new pivot point. Joint contact point changes
8
Q
Can all these happen in out joints?
A
Yes. We get more range of motion with all of them but when there is too much, easier to damage.
- Ligament tear will increase spin
- Articular cartilage tear will increase roll and glide, causing pain and inflammation
9
Q
Plane joint
A
- One plane movement
- Translation (sliding)
- Ex: inter tarsal joints
- No axis of rotation
10
Q
Pivot joints
A
- Movement in a single plane
- Uniaxial
- Ex: atlas/axis and proximal radial/ulnar joint
11
Q
Hinge joint
A
- One axis of rotation
2. Ex: elbow joint and ankle joint
12
Q
Condyloid/ellipsoid
A
- 2 planes of rotation
2. Ex: metacarpal (frontal and sagittal plane)
13
Q
Saddle joint
A
- Two planes of rotation
2. Ex: carpometacarpal joint of the thumb
14
Q
Ball and socket joint
A
- Three planes of rotation
2. Ex: hip joint and shoulder joint and sternal/claviclar joint
