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Flashcards in Joints and Joint tissue Deck (20)
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1
Q
Two types of Synarthroses (fibrous)
A
1) Synostosis - may fuse (skull suture)
2) Syndesmosis - unfused (interosseous)
2
Q
What predominately makes up synarthroses
A
collagen fibres
3
Q
What type of joint is a synchondroses, and what types are there?
A
Cartilagenous. There are primary or secondary
4
Q
Primary synchondroses?
A
bone-cartilage-bone.
eg) epiphyseal plates (small amount of movement)
eg) costocartilage (for ventilation)
5
Q
Secondary synchondroses?
A
bone-cartilage-FCT-cartilage-bone
eg) intervertebral disc
vertebrae-hyaline cartilage-NP and AF- hyaline cart-vertebrae
eg) manubriosternal joint
6
Q
Whats in NP
A
hyaluronon, sulphate and PG
7
Q
Whys it hard to pull apart two vertebral bodies?
A
Due to the annulus fibrosus. It has collagen fibres that extend into the cartilage and some even down into bone (sharpeys fibres)
8
Q
There is a ____________ between NP and AF
A
gradual transition
9
Q
How do we shrink over a day?
A
NP is sandwhiched between two cartilage plates. These squeeze down on NP and water (bound to hyaluronan) is squeezed out/ lost, and the tissue collapses a little. Collectively over all the vertebrae, you loss a few mm, that is regained at night.
10
Q
where is the COG in the different regions
A
Cervical= right over NP
thoracic= posterior as there is more ant tissue
lumber= both COG and NP are posterior
11
Q
What is the danger in the lumbar region?
A
As both COG and NP are posterior, this becomes a weak point. The AF can stiffen and break, and allow the soft NP to leak out and impinge a nerve root
12
Q
What's a diarthroses
A
A synovial joint
bone-cartilage-jointspace-cartilage-bone
13
Q
what are menisci and what can happen to them
A
Wedges of fibrocartilage that improve the articulation. very thin centrally, these can tear and jam into the joint
14
Q
examples of diarthroses
A
1) temporomandibular joint
15
Q
Whats in synovial fluid?
A
hyaluronan (binds water and low coefficients of friction)
16
Q
Where do you find synovium?
A
tendon sheaths
bursa
17
Q
Where are you most likely to develop degenerative artritis?
A
In the periphery of your joints where the PG content is lower.
18
Q
Ways to prevent degenerative arthritis
A
By using your joints IN THE FULL RANGE OF MOTION
19
Q
What can happen when you get bone on bone
A
Your bone tries to disperse the force, and creates 'osteophytes'/bony spurs.
20
Q
uniaxial, biaxial and triaxial/multiaxial
A
one/two/three planes of movement
1) Hinge joint (shoulder)
2) finger joint
3) Ball and socket (shoulder)