Muscles

Question 1

Subclavius Innervation

Answer 1

subclavian nerve

Question 2

subclavius origin

Answer 2

1st rib and cartilage

Question 3

subclavius insertion

Answer 3

inferior surface of the middle 1/3 of clavicle

Question 4

subclavius actions

Answer 4

depress the clavicle and draw it anteriorly
elevate the 1st rib during inhalation
stabilize the sternoclavicular joint

Question 5

serratus anterior innervation

Answer 5

long thoracic nerve

Question 6

serratus anterior origin

Answer 6

external surfaces of upper 8 or 9 ribs

Question 7

serratus anterior insertion

Answer 7

anterior surface of the medial border of the scapula

Question 8

serratus anterior actions

Answer 8

w/ origin fixed:
abduct
upwardly rotate
depress scapulothoracic joint
hold medial border of scap against the ribcage

w/ scap fixed:
may act to elevate the thorax during forced inhalation

Question 9

coracobrachialis innervation

Answer 9

musculocutaneous nerve

Question 10

coracobrachialis origin

Answer 10

coracoid process of the scapula

Question 11

coracobrachialis insertion

Answer 11

medial surface of the mid-humeral shaft

Question 12

coracobrachialis actions

Answer 12

flex the glenohumeral joint
Adduct the glenohumeral joint

Question 13

Teres Major innervation

Answer 13

lower subscapular nerve

Question 14

teres Major origin

Answer 14

inferior angle and lower 1/3 of the lateral border of the scapula

Question 15

teres major insertion

Answer 15

crest of the lesser tubercle of the humerus

Question 16

teres major actions

Answer 16

extend the glenohumeral joint
adduct the glenohumeral joint
medially rotate the glenohumeral joint

Question 17

supraspinatus innervation

Answer 17

suprascapular nerve

Question 18

supraspinatus origin

Answer 18

supraspinous fossa of the scapula

Question 19

supraspinatus insertion

Answer 19

greater tubercle of the humerus

Question 20

supraspinatus actions

Answer 20

abduct the glenohumeral joint
stabilize the head of the humerus in the glenoid cavity

Question 21

infraspinatus innervation

Answer 21

suprascapular nerve

Question 22

infraspinatus origin

Answer 22

infraspinous fossa of the scapula

Question 23

infraspinatus insertion

Answer 23

greater tubercle of the humerus

Question 24

infraspinatus actions

Answer 24

adduct the glenohumeral joint
laterally rotate the glenohumeral joint
stabilize the head of the humerus in the glenoid cavity

Question 25

teres minor innervation

Answer 25

axillary nerve

Question 26

teres minor origin

Answer 26

upper 2/3 of lateral border of the scapula

Question 27

teres minor insertion

Answer 27

greater tubercle of the humerus

Question 28

teres minor actions

Answer 28

laterally rotate the glenohumeral joint adduct the glenohumeral joint stabilize the head of the humerus in the glenoid cavity

Question 29

subscapularis innervation

Answer 29

upper and lower subscapular nerve

Question 30

subscapularis origin

Answer 30

subscapular fossa of the scapula

Question 31

subscapularis insertion

Answer 31

lesser tubercle of the humerus

Question 32

subscapularis actions

Answer 32

medially rotate the glenohumeral joint stabilize the head of the humerus in the glenoid cavity

Question 33

Latissimus Dorsi innervation

Answer 33

thoracodorsal nerve

Question 34

latissimus dorsi Origin

Answer 34

inferior angle of scapula, spinous processes of the last 6 thoracic vertebrae, last 3 or 4 ribs, thoracolumbar fascia and posterior iliac crest

Question 35

latissimus dorsi insertion

Answer 35

intertubercular groove of the humerus

Question 36

latissimus dorsi actions

Answer 36

extend the glenohumeral joint adduct the glenohumeral joint medially rotate the glenohumeral joint

Question 37

Trapezius innervation

Answer 37

spinal portion of the cranial nerve 11, and ventral ramus C2,3,4

Question 38

trapezius origin

Answer 38

external occipital protuberance, medial portion of the superior nuchal line of the occiput, ligamentum nuchae and spinous process of c7-t12

Question 39

trapezius insertion

Answer 39

lateral 1/3 of clavicle, acromion and spine of scapula

Question 40

trapezius actions

Answer 40

upper fibres: Bilaterally- extend the head and neck unilaterally- laterally flex the head and neck rotate the head and neck to the opposite side elevate the scapulothoracic joint upwardly rotate the scapulothoracic joint middle fibres: adduct the scapulothoracic joint stabilize the scapulothoracic joint lower fibres: depress upwardly rotate the scapulothoracic joint

Question 41

rhomboids innervation

Answer 41

dorsal scapular nerve

Question 42

rhomboids origin

Answer 42

Major: spinous process of t2-t5 Minor: spinous process of c7-t1

Question 43

rhomboids insertion

Answer 43

Major: medial border of the scapula between the spine of the scapula and inferior angle Minor: upper portion of the medial border of the scapula, across from the spine of the scapula

Question 44

rhomboids actions

Answer 44

adduct scapulothoracic joint elevate scapulothoracic joint downwardly rotate the scapulothoracic joint

Question 45

Deltoid innervation

Answer 45

axillary Nerve

Question 46

deltoid origin

Answer 46

lateral 1/3 of clavicle, acromion and spine of the scapula

Question 47

deltoid insertion

Answer 47

deltoid tuberosity

Question 48

deltoid action

Answer 48

all: Abduct the glenohumeral joint ant. fibres: flex, medially rotate and horizontally adduct the gh joint Post fibres: Extend, laterally rotate and horizontally abduct the gh joint