Articulations of pectoral girdle

Question 1

Joints

Answer 1

site of articulations between bones

Question 2

3 functional joint types

Answer 2

1. synovial = diarthrosis/freely moveable
2. cartilaginous = amphiarthroses/slightly moveable
3. fibrous = synarthrosis/immovable

Question 3

Synovial joints

Answer 3

• motion & flexibility
• contains synovial fluid
• articular hyaline cartilage covering articulating surfaces
• joint capsule

Question 4

Joint capsule parts

Answer 4

• outer fibrous membrane
• inner synovial membrane

Question 5

synovial membrane of joint capsule

Answer 5

• attaches at margin of joint surfaces between cartilage and bone
• produces synovial fluid
• lines synovial bursae also

Question 6

Synovial bursae

Answer 6

• contain synovial fluid
• acts as a cushion to reduce friction
• located between tissues (tendon/muscle/bone)

Question 7

Fibrous membrane

Answer 7

surrounds and stabilises joint parts thicken to form ligaments

Question 8

ligaments

Answer 8

bone to bone

Question 9

tendons

Answer 9

muscle to bone

Question 10

uniaxial movement

Answer 10

movement in a single plane

Question 11

biaxial

Answer 11

movement in 2 planes

Question 12

multiaxial

Answer 12

movement in 3 planes

Question 13

Types of synovial joints

Answer 13

• plane/flat
• hinge
• ball-and-socket
• saddle
• pivot
• ellipsoid/condyloid

Question 14

plane joint

Answer 14

• flat articular surfaces
• bones slide
• Acromioclavicular joint

Question 15

Hinge joint

Answer 15

• resembles door hinge
• flexion and extension
• elbow, interphalangeal joints

Question 16

ball and socket

Answer 16

• rounded head into cavity
• multiaxial
• shoulder/glenohumeral joint

Question 17

saddle joint

Answer 17

• reciprocally concave/convex articular surfaces
• flexion/extension and ab/adduction
• between metacarpal 1 and trapezium

Question 18

pivot joint

Answer 18

• rounded process of bone rotates around central axis within ligamentous ring/sleeve
• rotation
• radius rotate on ulna at proximal/distal radioulnar joints

Question 19

ellipsoid/condyloid joint

Answer 19

• 2 curved bones together. convex surface to concave surface
• flexion/extension
• ab/adduction
• circumduction
• wrist/radiocarpal joint
• metacarpophalangeal joints of fingers

Question 20

articulation of clavicle with axial skeleton

Answer 20

sternoclavicular joint

Question 21

articulation of clavicle and scapula with each other

Answer 21

acromioclavicular joint

Question 22

articulating surfaces of the sternoclavicular joint

Answer 22

• clavicle
• manubrium of sternum
• cartilage of 1st rib

Question 23

what type of joint is the sternoclavicular joint?

Answer 23

saddle joint

Question 24

ligaments in the sternoclavicular joint

Answer 24

• anterior sternoclavicular ligament
• posterior sternoclavicular ligament

Question 25

interclavicular ligament

Answer 25

- joins superior surface of 2 clavicles across sternal notch - limits depression of shoulder

Question 26

costoclavicular ligament

Answer 26

- from 1st costal cartilage to inferior surface clavicle - limits elevation of shoulder

Question 27

articular disk of SC joint

Answer 27

- between sternum and clavicle - allows clavicle and manubrium to slide over each other

Question 28

blood supply to the sternoclavicular joint

Answer 28

internal thoracic & suprascapular arteries

Question 29

innervation to SC joint

Answer 29

branches from nerve to subclavius

Question 30

Acromioclavicular joint location

Answer 30

between clavicle and shoulder

Question 31

articulating surfaces of acromioclavicular joint

Answer 31

- clavicle - acromion of scapula

Question 32

What type of synovial joint is the acromioclavicular joint?

Answer 32

plane

Question 33

movements of acromioclavicular joint

Answer 33

gliding, rotation of the scapula on clavicle

Question 34

ligaments that strengthen and stabilise the AC joint

Answer 34

- superior acromioclavicular ligament - inferior acromioclavicular ligament - conoid ligament - trapezoid ligament

Question 35

coracoclavicular ligament

Answer 35

- attaches coracoid process to clavicle - supports lateral end of clavicle - comprised of trapezoid and conoid ligaments

Question 36

Blood supply to AC joint

Answer 36

supraclavicular and thoracoacromial arteries

Question 37

innervation of AC joint

Answer 37

branches from lateral pectoral and suprascapular nerves