Musculoskeletal Part Two

Question 1

supraspinatus AND infraspinatus

nerve roots
innervation

Answer 1

NR: C4-C6

I: suprascapular

Question 2

glenohumeral ligament stabilizes what part of the joint

Answer 2

anterior glenohumeral capsule

Question 3

sternocleidomastoid nerve roots AND innervation

Answer 3

C1-C4

cervical spinal accessory

Question 4

the rotator cuff muscles all stabilize the shoulder. in what direction do all of them specifically stabilize it

Answer 4

supraspinatus: superiorly

infraspinatus/TMinor: posteriorly

subscapularis: anteriorly

Question 5

what happens to the clavicle during the first 90 degrees of shoulder abduction

Answer 5

clavicle elevates 35-45 degrees at the sternoclavicular joint

Question 6

what other two muscles have the same function as the lats

Answer 6

teres major

subscapularis

Question 7

what happens to the ulna during elbow flexion

Answer 7

supinates slightly

Question 8

anconeous action

Answer 8

elbow extension

Question 9

what levels at the thoracic spine do the superior AND inferior angle of the scapula cover

Answer 9

superior: T2
inferior: T7

Question 10

as a group, what do the rhomboids, middle trap, and lower trap cause for the scapula

Answer 10

scapular retraction

Question 11

where is the transverse humeral ligament located

Answer 11

over the biccipital groove

Question 12

the coracoclavicular ligament covers what muscle

Answer 12

supraspinatus

Question 13

articulation of humeroradial joint

Answer 13

distal end of humerus (capitulum)

with concave oval facet of proximal radius

Question 14

teres minor action

Answer 14

shoulder ER

Question 15

the UCL provides resistance to _____ forces

Answer 15

valgus

Question 16

where is the elbow bursa located

Answer 16

over the olecrenon process

Question 17

what occurs at 75 degrees of shoulder elevation and why

Answer 17

ER

prevents compression of greater tubercle against acromion

Question 18

what does the glenoid labrum attach to

Answer 18

capsule superior and inferior

long head of biceps tendon superior

Question 19

lattisimus dorsi:

nerve roots
innervation

Answer 19

NR: C5-C8

I: thoracodorsal

Question 20

ratio of movement during elevation between GH and scapulothoracic

Answer 20

2:1

GH:ST

Question 21

deltoid:

myotome
nerve roots
innervation

Answer 21

M: C5

NR: C5-C6

innervation: axillary nerve

Question 22

what two structures is the subacromial bursa between

Answer 22

deltoid

capsule

Question 23

the RCL provides resistance to ____ forces

Answer 23

varus

Question 24

annular ligament purpose

Answer 24

protect radial head

Question 25

in order to palpate the subacromial/subdeltoid bursa, what motion should be done

Answer 25

extend the humerus

Question 26

how can the axillary artery be injured

Answer 26

compressed against the humerus (crutches)

Question 27

what ligament acts as a retinaculum for long biceps tendon

Answer 27

transverse humeral ligament

Question 28

is there more mobility or stability in the GH joint

Answer 28

lots more mobility than stability

Question 29

what may happen if static stability of the GH joint is compromised

Answer 29

rotator cuff muscles fire and can cause subacromial impingement

Question 30

do the rotator cuff muscles insert into the joint capsule

Answer 30

yes

Question 31

serratus anterior: action nerve roots innervation

Answer 31

A: protraction, upward rotation NR: C5-C7 innervation: long thoracic nerve

Question 32

when is the annular ligament most taut

Answer 32

the extremes or pronation and supination

Question 33

what happens to the position of the elbow in extension

Answer 33

the ulna pronates slightly in extension

Question 34

upper trapezius myotome AND innervation

Answer 34

C4 spinal accessory

Question 35

articulation of humeroulnar joint

Answer 35

distal end of humerus (trochlea) with proximal end of ulna

Question 36

during shoulder elevation, what direction does the head of the humerus move

Answer 36

inferiorly

Question 37

for 180 degrees of elevation, where does the first 30-60 degrees come from

Answer 37

GH

Question 38

where is the elbow capsule thin

Answer 38

anterior and posterior

Question 39

what does the quadrate ligament do

Answer 39

reinforces inferior joint capsule

Question 40

when is sternoclavicular joint injured

Answer 40

following injury to AC joint and clavicle

Question 41

where can the axillary artery be palpated

Answer 41

lateral wall of the inerior part of the scapula

Question 42

purpose of coracohumeral ligament

Answer 42

reinforce biceps tendon reinforce superior capsule prevent caudal (downward) dislocation of humerus

Question 43

what type of cartilage is associated with the sternoclavicular joint

Answer 43

fibrocartilage

Question 44

out of 180 degrees of elevation, where does 120 degrees of movement come from

Answer 44

GH

Question 45

main contributor to stability of the elbow

Answer 45

articulation between trochlea (humerus) and trochlear fossa (ulna)

Question 46

what is the elbow capsule continuous with

Answer 46

UCL medially RCL laterally

Question 47

pec major/pec minor nerve roots AND innervation

Answer 47

C5-T1 medial/lateral pectoral nerves

Question 48

purpose of coracoclavicular ligament

Answer 48

stabilizes AC joint prevents upward displacement of humeral head

Question 49

coracobrachialis: action nerve roots innervation

Answer 49

A: shoulder flexion & adduction NR: C6-C7 I: Musculocutaneous