Ch 10- Shoulder Joint

Question 1

Joint motions at shoulder joint

Answer 1

flexion/extension/hyperextension, abduction/adduction, medial/lateral rotation, horizontal abduction/adduction

Question 2

Flexion degrees of motion

Answer 2

0 to 180 degrees

Question 3

Hyperextension degrees of motion

Answer 3

45 degrees

Question 4

Abduction/adduction degrees of motion

Answer 4

180 degrees of motion possible

Question 5

Medial/lateral rotation degrees of motion

Answer 5

90 degrees in each direction

Question 6

Horizontal abduction degrees (backward motion) of motion

Answer 6

30 degrees

Question 7

Horizontal adduction degrees (forward motion) of motion

Answer 7

120 degrees

Question 8

Scaption of shoulder degrees of motion

Answer 8

180 degrees of up and down motion is possible

Question 9

Normal end feel for all shoulder joint motions

Answer 9

firm

Question 10

greatest amount of arthrokinematic motion is when ___

Answer 10

glenohumeral joint is in the open packed position of 55 degrees abduction and 30 degrees horizontal adduction; a mobilizing force that glides the humeral head into the direction of restriction can help restore movement between the joint surfaces and lengthen fibers of the joint capsule

Question 11

Ligaments

Answer 11

pgs. 148-149

Question 12

Anterior deltoid

Answer 12

O- lateral third of clavicle
I- deltoid tuberosity
A- Shoulder abduction, flexion, medial(internal) rotation, horizontal adduction
N- Axillary nerve (C5, C6)

Question 13

Middle deltoid

Answer 13

O- acromion process
I- deltoid tuberosity
A- shoulder abduction
N- axillary nerve (C5, C6)

Question 14

Posterior deltoid

Answer 14

O- spine of scapula
I- deltoid tuberosity
A- shoulder abduction, extension, hyperextension, lateral(external) rotation, horizontal abduction
N- axillary nerve (C5, C6)

Question 15

Pectoralis major (clavicular portion)

Answer 15

O- clavicle
I- lateral lip of bicipital groove of humerus
A-first 60 degrees of shoulder flexion
N- lateral and medial pectoral nerves (C5,6,7,8, T1)

Question 16

Pectoralis major (sternal portion)

Answer 16

O- sternum, costal cartilage of first 6 ribs
I- lateral lip of bicipital groove of humerus
A-first 60 degrees of shoulder extension (from 180 to 120)
N- lateral and medial pectoral nerves (C5,6,7,8, T1)

Question 17

Pectoralis major (clavicular and sternal portions actions together)

Answer 17

O- clavicle, sternum, and costal cartilage of ribs 1 to 6
I- lateral lip of bicipital groove of humerus
A- shoulder adduction, medial(internal) rotation, and horizontal adduction
N- lateral and medial pectoral nerves (C5,6,7,8, T1)

Question 18

Latissimus dorsi

Answer 18

O- T7 through L5, sacrum, iliac crest, and lower 3 ribs
I- medial floor of bicipital groove of humerus
A- shoulder extension, adduction, medial(internal) rotation, hyperextension
N- thoracodorsal nerve (C6,7,8)

Question 19

Teres major

Answer 19

O- inferior axillary border of scapula
I- medial lip of bicipital groove on the anterior surface of the humerus
A- shoulder extension, adduction, and medial(internal) rotation
N- lower subscapular nerve (C5,6,7)

Question 20

Supraspinatus (most commonly injured)

Answer 20

O- supraspinous fossa of the scapula
I- greater tubercle of the humerus
A- shoulder abduction
N- suprascapular nerve (C5,6)

Question 21

Infraspinatus

Answer 21

O- infraspinous fossa of scapula
I- greater tubercle of humerus
A- shoulder lateral(external) rotation, horizontal abduction
N- suprascapular nerve (C5,6)

Question 22

Teres minor

Answer 22

O- axillary border of scapula
I- greater tubercle of humerus
A- shoulder lateral(external) rotation, horizontal abduction
N- axillary nerve (C5,6)

Question 23

Subscapularis

Answer 23

O- subscapular fossa of the scapula
I- lesser tubercle of the humerus
A- shoulder medial(internal) rotation
N- upper and lower subscapular nerves (C5,6)

Question 24

Coracobrachialis

Answer 24

O- coracoid process of the scapula
I- mid-humerus
A- stabilizes the shoulder joint
N- musculocutaneous nerve (C5,6,7)

Question 25

Scapulohumeral rhythm

Answer 25

for every 2 degrees the shoulder joint abducts, the shoulder girdle upwardly rotates 1 degree, 2:1 ratio

Question 26

Reverse muscle action during crutch walking

Answer 26

when arms are stabilized on the crutch handles, the pectoralis major and latissimus dorsi elevate the rib cage, sternum, and pelvis in allowing the body to swing through the crutches

Question 27

Rotator cuff muscles (SITS muscles)

Answer 27

observing the distal attachments of the supraspinatus, infraspinatus, and teres minor muscles on the greater tubercle of the humerus they essentially form a line, these three muscles plus the subscapularis (above-ish the supraspinatus) are what forms the rotator cuff

Question 28

subacromial space

Answer 28

common area for pathology, know the structures there, 38 minutes on anat shoulder