Scapula & shoulder

Question 1

Glenohumeral is what type of joint?

Answer 1

ball & socket, convex on concave

Question 2

Acromioclavicular is what type of joint?

Answer 2

gliding, convex on convex

Question 3

sternoclavicular is what type of joint?

Answer 3

double planar, convex on concave

Question 4

scapulothoracic is what type of joint?

Answer 4

not a true joint but between scapula and thoracic cage consists of muscle, connective tissue & bursa that allow for gliding type movements, concave on convex

Question 5

Same direction slide & roll is

Answer 5

concave on convex

Question 6

opposite direction slide & roll is

Answer 6

convex on concave

Question 7

Active Range of motion for the shoulder is? AROM

Answer 7

Flexion = 180 Extension = 60 Internal rotation = 90 External rotation = 80 Abduction = 180 Adduction = 35 Horizontal Adduction = 130 Horizontal Abduction = 35

Question 8

Resting or open packed position

Answer 8

joint capsule is relaxed or untwisted

Question 9

glenohumeral resting position

Answer 9

55-70 ABD, 30 horizontal ADD

Question 10

Acromioclavicular resting position

Answer 10

Arm @ side

Question 11

Sternoclavicular resting position

Answer 11

maximum shoulder elevation and protraction

Question 12

Closed Packed position

Answer 12

no further movement in that motion is possible

Question 13

GH closed packed

Answer 13

max abduction & external rotation

Question 14

AC closed packed

Answer 14

90 abduction

Question 15

SC closed packed

Answer 15

full elevation of scapula

Question 16

Phase 1

Answer 16

0-30 degrees

Rtc acts as group to dpress humerus

supraspinatus

deltoid

GH - superior roll with inferior glide

scapula - externally rotates ( serratus anertior stabilizes)

SC - distal end elevates, superior rollwith inferior glide

Question 17

phase 2

Answer 17

30 - 90

GH

RTC - depresses and laterally rotates

Deltoid, supraspinatus - ABD

greatest impingement @ 70 - 120

Scapula

externally rotates, serratus anterior prevents winging

upper and lower trapforces balance eachother out

SC

elevation of distal clavicle due to superior roll and inferior glide

Coracoclavicular ligaments become taunt and stop the superior roll and inferior glide that makes up hinge action, cause rotation in phase 3

AC

some twisting and rotation

Question 18

phase 3

Answer 18

90 - 180

GH

deltoid and supra spinatus

biceps join

RTC and ligaments acts to depress, ER, and stabilize GH joint

Scapula

upper trap more active than lower

Serratus anterior externally rotates scapula

SC

rotates externally and points upward

AC rotation is due to scapular rotation

Question 19

Answer 19

Acromioclavicular joint ligament

Trapezoid ligament

Conoid ligament

Question 20

Answer 20

Anterior SC ligament

Interclavicular ligament

costoclavicular ligament

Question 21

Answer 21

Coracoacromial ligament

joint capsule

Biceps brachii long head tendon

Tricepts brachii long head tendon

Glenoid labrum

Question 22

what forms the roof of the subacromial space and what is inside of it?

Answer 22

roof: coracoacromial ligament

Inside: subacromial bursa, supraspinatus tendon, biceps tendon

Question 23

what is the purpose of the GH labrum?

Answer 23

to increase the surface area of the glenoid fossa for contact with the humeral head providing stability

Question 24

the rotator cuff is what 4 muscles?

Answer 24

• supraspinatus
• infraspinatus
• teres minor
• subscapularis