Superficial back muscles Flashcards Preview

AA Exam 5 (Final) > Superficial back muscles > Flashcards

Flashcards in Superficial back muscles Deck (33):
1

Trapezius ascending part action?

draws scapula medially downward

2

Trapezius transverse part action?

draws scapula medially

3

Trapezius descending part action?

  • scapula obliquely upward
  • rotates glenoid cavity superiority
  • tilts head to same side
  • rotates it to opposite

4

Trapezius ascending part innervation?

Trapezius transverse part innervation?

Trapezius descending part innervation?

spinal accessory for all 3

5

Levator scapulae action?

  • scapula medially upward
  • inferior angle medially
  • inclines neck to same side

6

Levator scapulae innervation?

dorsal scapular

7

Rhomboid major and minor action? Nerve?

  • steadies scapula
  • draws scapula medially upward
  • dorsal scapular nerve

8

Latissimus dorsi action? Nerve?

  • internal rotation
  • adduction
  • extension
  • respiration (“cough muscle”)
  • Thoracodorsal nerve

9

Teres major action? Nerve?

  • internal rotation
  • adduction
  • extension
  • Lower subscapular nerve

10

What are the three types of interactions between latissimus dorsi and the inferior angle of the scapula?

  • Type 1: Direct Attachment (muscular slips are anchored directly onto the inferior angle of the scapula.
  • Type 2a: Indirect Attachment (few muscle fibers with a soft, fibrous link between the two (fascia))
  • Type 2b: No Attachment (a bursa and no connective tissue between the two. 21% of the population had no attachment at all)

The majority of people (79%) had either a Type 1 (direct, 43%) or Type 2a (indirect, 36%)

11

Thoracodorsal nerve is off of what cord?

the posterior cord (UTLRA)

12

Lower subscapular nerve is off of what cord and what muscle?

posterior cord subscapular muscle

13

Shoulder girdle elevators:

  • Rhomboid major
  • Rhomboid minor
  • Levator scapulae Trapezius (superior part)

14

Shoulder girdle depressors:

  • Trapezius (inferior part)
  • Pectoralis minor

15

Shoulder girdle superior rotators:

  • Serratus anterior
  • Trapezius (superior part)

16

Shoulder girdle inferior rotators:

  • Rhomboid major
  • Rhomboid minor
  • Levator scapulae

17

  • Deltoid action anterior head?
  • Deltoid action posterior head?
  • Nerve?

  • Anterior
    • shoulder flexion
    • horizontal abduction
    • Internal Rotation
  • Posterior
    • Shoulder extension
    • horizontal adduction
    • external rotation
  • Axillary Nerve

18

Quadrangular space boundaries?

Quadrangular space nerve?

  • Teres major
  • Teres minor
  • Triceps brachii
  • Humerus
  • Axillary Nerve

19

Pectoralis major action? Nerve

  • Flexion
  • Respiration
  • Medial and Lateral pectoral nerve

20

Pectoralis minor action? Nerve?

  • draws scapula downward
  • rotates glenoid inferiorly
  • respiration
  • medial pectoral nerve

21

Coracobrachialis action? Nerve?

  • shoulder flexion
  • adduction
  • musculocutaneous nerve

22

Subclavius action? Nerve?

  • steadies clavicle
  • nerve to subclavius

23

Serratus anterior

  • Superior action?
  • Intermediate action?
  • Inferior action?
  • Nerve?

  • superior
    • medial rotation of scapula
  • intermediate
    • protracts scapula
    • elevates ribs when shoulder is fixed
  • inferior
    • rotates scapula laterally (assisting lower trapezius)
  • long thoracic nerve

24

Supraspinatus action? Nerve?

  • shoulder abduction (instrumental for the “setting phase”)
  • suprascapular nerve

25

Infraspinatus action? Nerve?

  • External rotation
  • suprascapular nerve

26

Teres minor action? Nerve?

  • External rotation
  • axillary nerve

27

Subscapularis action? Nerve?

  • IR of shoulder
  • upper and lower subscapular

28

  • What is the 5th rotator cuff muscle?
  • What does it do?

  • Biceps brachii
  • The tendon of its long head prevents superior migration.

29

Tendon of the long head of the biceps tendon articulation?

intra-articular but extra-synovial

30

Biceps brachii action? Nerve?

  • elbow flexion
  • supination
  • shoulder flexion
  • stabilizer of humeral head during deltoid contraction
  • physical block to superior and anterior GH translation
  • internal rotation
  • abduction of humerus
  • assist the rotator cuff in creating GH joint compression
  • musculocutaneous nerve

31

Brachialis action? Nerve?

  • elbow flexion
  • musculocutaneous and radial nerve

32

  • Triceps brachii long head action?
  • Triceps brachii entire muscle action?
  • Nerve?

  • long head
    • shoulder extension
    • shoulder adduction
  • entire muscle
    • elbow extension
  • radial

33

Anconeus action? Nerve?

  • extends elbow
  • tightens the joint
  • radial nerve