MS Bones And Joints Of Shoulder Girdle

Question 1

GH joint articulating surfaces

Answer 1

Glenoid fossa of scapula within the head of the humerus

Question 2

GH joint classification

Answer 2

Structural: Multi-axial, ball and socket, synovial joint
Functional: Diarthrodial

Question 3

GH movements permitted

Answer 3

Abduction/adduction
Flexion/extension
Horizontal abduction/adduction
Internal/external rotation

Question 4

GH ligaments

Answer 4

Capsule
GH ligament
Coracohumeral ligament
Transverse humeral ligament
Coracocrominal ligament

Question 5

GH bursae and labrum

Answer 5

GH labrum
Subdeltoid bursa
Subocranial bursa
Subscapular bursa

Question 6

Capsule (GH)

Answer 6

Axillary recess
Lax in adduction, taught in abduction

Question 7

Glenohumeral ligament

Answer 7

Partially capsular, anterior
Z-shaped with three bands: superior, middle, interior
Limits external rotation and horizontal abduction

Question 8

Coracohumeral ligament

Answer 8

GH
Extracapsular
2 bands: superior, inferior
Helps support dependent arm against gravity

Question 9

Transverse humeral ligament

Answer 9

GH
Extracapsular
Anchors long head of biceps tendon within the intertubular sulcus

Question 10

Coracoacromial ligament

Answer 10

GH
Extracapsular
Band arches over GH joint
Forms portion of roof of subacromial arch
Limits elevation of the humerus/ superior displacement of head of humerus
Contributes to coracoacromial arch

Question 11

GH labrum

Answer 11

Intracapsular
Lines glenoid fossa to deepen thus increasing congruency

Question 12

Subdeltoid bursa

Answer 12

GH
Sits between the acromian and proximal humerus and deltoid

Question 13

Subocranial bursa

Answer 13

GH
Between acromion and supraspinatus tendon

Question 14

Subscapular bursa

Answer 14

GH
Between glenohumeral ligament/anterior joint capsule and subscapularis tendon

Question 15

Acromioclavicular joint articulating surfaces

Answer 15

Acromial facet of clavicle
Clavicular facet of acromion (medial acromion)

Question 16

AC joint classification

Answer 16

Structural: non axial, plane, synovical
Functional: diarthrodial

Question 17

AC movements permitted

Answer 17

Superior/inferior scapular rotation
Scapular protraction/retraction
Upward tip/anterior tilt

Question 18

AC ligaments

Answer 18

Capsule
Acromioclavicular ligaments
Coracoclavicular ligaments ( Conoid and Trapezoid)
Superior transverse scapular ligament

Question 19

Capsule (AC)

Answer 19

Relatively weak
Within is a disc, often absent by age 40

Question 20

Acromioclavicular ligament

Answer 20

Extracapsular
Superior and inferior bands
Limit one bone over riding another

Question 21

Coracoclavicular ligament ( Conoid and Trapezoid)

Answer 21

AC
Extra capsular
Trapezoid attaches lateral
Conoid attaches medial
Helps disperse force in a FOOSH

Question 22

Superior transverse scapular ligament

Answer 22

AC
Extra capsular
Doesn’t cross a joint
Spans the suprascapular notch

Question 23

Sternoclavicular joint articulating surfaces

Answer 23

Sternal facet of the clavicle and costo cartilage of rib 1 with the superolateral manubrium /clavicular facet

Question 24

AC joint classification

Answer 24

Structural: biaxial, saddle, synovial
Functional: Diarthrodial

Question 25

AC movements permitted

Answer 25

Clavicular elevation/depression Clavicular protraction/retraction Clavicular rotation

Question 26

SC ligaments

Answer 26

Capsule Sternoclavicular ligament Costoclavicular ligament Interclavicular ligament

Question 27

Capsule (SC)

Answer 27

Lax and thin above and below joint Disc (intra-capsular) attached to the clavicle superiorly and costocartilage of rib 1 inferiorly The disc divides the SC into 2 joint spaces: medial and lateral Function of the disc: shock absorption

Question 28

Sternoclavicular ligament

Answer 28

SC Extra capsular Two bands: Anterior and posterior Limit anterior/posterior clavicular movement

Question 29

Costoclavicular ligament

Answer 29

SC Extracapsular Goes from Costco cartilage of rib 1 to inferior clavicle Limits clavicular motion at 90° GH abduction

Question 30

Interclavicular ligament

Answer 30

SC Extra capsular Spans sternal notch Limit superior and inferior clavicular displacement