Test 2- Part 3: The Shoulder Flashcards Preview

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Flashcards in Test 2- Part 3: The Shoulder Deck (45):
1

Resists excessive depression or downward glide of the clavicle

Interclavicular joint

2

Resists clavicular elevation and superior glide of the clavicle

Costoclavicular

3

Resists anterior movement of the head of the clavicle

Anterior Sternoclavicular

4

Resists posterior movement of the head of the clavicle

Posterior Sternoclavicular

5

Most important ligament in stabilizing AC joint for normal daily activities

Acromioclavicular

6

The most important ligament for support of the joint against significant
injuries and superior displacement

Coracoclavicular

7

Roll, glide, & pivot

GH Joint

8

Stabilize the shoulder in adduction
• Helps to prevent posterior and inferior instability

Superior GH Ligament

9

Limits external rotation at 45 deg of abduction
• Helps to prevent posterior and inferior instability

Middle GH ligament

10

Primary restraint to anterior and anteroinferior instability
• Limits external rotation at 45 to 90 deg of abduction

Inferior GH ligament

11

• Posterior capsule and the teres minor restrain internal rotation

Posterior GH ligament

12

Origin of the trapezius upper fibers

External occipital protuberance (muscle in back of neck) ,medial portion of superior nuchal line, (mustache coming off of skull) ligamentum nuchae and spinous process C1-C6 (dinosaur spikes)

13

Insertion of the trapezius upper fibers

Lateral 1/3 of the clavicle (end of clavicle)

14

Action of trapezius upper fibers

• Laterally flex the head and neck to same side
• Rotate the head and neck to opposite side
• Elevate the scapula
• Upwardly rotate the scapula

15

Origin of trapezius middle fibers

Spinous processes of C7-T3 (

16

Insertion

Acromion process and
superior scapular spine

17

Action of trapezius middle fibers

Adduct the scapula (squeezing shoulder blades)
Stabilize the scapula (main role)

18

Origin of trapezius lower fibers

Spinous porcesses of T4-12

19

Insertion of trapezius lower fibers

Inferior, medial scapular spine (lower edge/medial edge of scapular spine)

20

Actions of trapezius lower fibers

Depress the scapula (pushing yourself off a chair)
Upwardly rotate the
scapula

21

Origin of levator scapulae

Transverse process of 1st -4th cervical vertebrae

22

Insertion of levator scapulae

Medial border of scapula, between superior angle and superior portion of spine of scapula

23

Action of levator scapulae

• Elevate the scapula
• Downwardly rotate the scapula
• Laterally flex the head and neck (to the ipilateral side) turning head to side
• Rotate the head and neck to same side (ipsiilateral)
• Extend the head and neck (used bilaterally)

24

Origin of rhomboid major

Spinous processes of t2-t5

25

Insertion of rhomboid major

Medial border of the scapula
between the spine of the
scapula and the inferior angle

26

Action of rhomboid major

Adduct the scapula
Elevate the scapula
Downwardly rotate the scapula
STABILIZE

27

Origin of rhomboid minor

Spinous processes c7-t1

28

Insertion of rhomboid minor

• Upper portion of medial border of the scapula, across
from spine of the scapula

29

Action of rhomboid minor

Adduct the scapula
• Elevate the scapula
• Downwardly rotate thescapula

30

Origin of seratus anterior

• External surfaces of upper eight or 9 ribs

31

Insertion of serratus anterior

Anterior surface of medial border of the scapula

32

Action of serratus anterior

Abduct the scapula (push-up plus, punches toward wall w/ weight)
• Upwardly rotate the scapula
• Depress the scapula
• Hold the medial border of the scapula against the rib cage (stability)
• May act to elevate the thorax during forced inhalation
(scapula fixed)

33

Origin of pectoralis minor

3rd, 4th, & 5th ribs

34

Insertion of pectoraiis major

Medial surface of coracoid
process of the scapula

35

Action

• Depress the scapula
• Abduct the scapula
• Downwardly rotate the scapula
• Assist to elevate the thorax
during forced inhalation
(scapula fixed)

36

Origin of deltoid

Anterior fibers:
• Lateral ⅓ of clavicle
• Middle fibers:
• Lateral aspect of acromion
• Posterior fibers:
• Inferior edge of spine of scapula

37

Insertion of deltoid

Deltoid tuberosity

38

Action of deltoid

Anterior fibers:
• Flex the shoulder
• Medially rotate the shoulder
• Horizontally adduct the
shoulder
• Middle fibers:
• Abduct the shoulder
• Posterior fibers:
• Extend the shoulder
• Laterally rotate the shoulder
• Horizontally abduct the
shoulder

39

Origin of pectoralis major

Upper Fibers
• Medial ½ of clavicle
• Lower Fibers
• Sternum and cartilage of 1st – 6th ribs

40

Insertion of pectoralis major

Crest of greater tubercle of
humerus

41

Action of pectoralis major

All Fibers
• Adduct the shoulder
• Medially rotate the shoulder
• Assist to elevate the thorax
during forced inhalation (arm
fixed)
• Upper fibers:
• Flex the shoulder
• Horizontally adduct the
shoulder
• Lower fibers:
• Extend the shoulder

42

Origin of latissimus dorsi

• Inferior angle of scapula
• Spinous process of last six
thoracic vertebrae
• Last three or four ribs
• Thoracolumbar aponeurosis
and posterior iliac crest

43

Insertion of latissimus dorsi

Intertubercular groove of the humerus

44

Action of latissimus dorsi

• Extend the shoulder
• Adduct the shoulder
• Medially rotate the shoulder

45

Origin of latissimus dorsi:

Inferior angle of scapula
• Spinous process of last six
thoracic vertebrae
• Last three or four ribs
• Thoracolumbar aponeurosis
and posterior iliac crest