Scapular and Deltoid Regions

Question 1

trapezius muscle innervation

Answer 1

CN XI

Spinal accessory nerve

Question 2

trapezius muscle blood supply

Answer 2

transverse cervical a (branch of thryocervical trunk)

Question 3

Trapezius muscle action

Answer 3

Retracts the scapula
Superior fibers: rotate glenoid cavity (abduction of arm)
middle fibers: upward rotation and prevent sagging

Question 4

latissimus dorsi innervation

Answer 4

thoracodorsal nerve (C6-C8)

Question 5

latissimus dorsi vascularization

Answer 5

thoracodorsal artery (branch of subscapular a. from axillary a)

Question 6

Latissimus dorsi action

Answer 6

adduction
medial rotation
extension
of arm

Question 7

levator scapulae innervation

Answer 7

dorsal scapular n

Question 8

levator scapulae blood supply

Answer 8

transverse cervical a (branch of thyrocervical trunk)

Question 9

levator scapulae actions

Answer 9

elevates medial angle of scapula

Question 10

rhomboideus major and minor innervation

Answer 10

dorsal scapular n

Question 11

rhomboideus major and minor vascularization

Answer 11

transverse cervical a (branch of thyrocervical trunk)

Question 12

rhomboideus major and minor actions

Answer 12

Elevates medial border and retracts scapula

Question 13

Serratus anterior innervation

Answer 13

long thoracic n .

Question 14

serratus anterior blood supply

Answer 14

lateral thoracic a

Question 15

serratus anterior actions

Answer 15

protracts scapula
holds medial border firmly against thoracic wall
upward rotation (with the trapezius)

Question 16

Deltoid innervation

Answer 16

axillary n (C5-C6)

Question 17

deltoid vascularization

Answer 17

deltoid branch of thoracoacromial trunk

Question 18

deltoid muscle actions

Answer 18

anterior (flex and medially rotate arm)
Middle fibers (abduct arm)
Posterior (extend and laterally rotate arm)

Question 19

supraspinatus innervation

Answer 19

suprascapular n (C5-C6)

Question 20

supraspinatus vascularization

Answer 20

suprascapular artery (branch of thyrocervical trunk

Question 21

supraspinatus actions

Answer 21

abduction of arm

Question 22

infraspinatus vascularization

Answer 22

suprascapular artery (branch . of thyrocervical trunk) 
circumflex scapular a

Question 23

infraspinatus innervation

Answer 23

suprascapular n

Question 24

infraspinatus actions

Answer 24

lateral rotation of arm

Question 25

teres major innervation

Answer 25

lower subscapular n

Question 26

teres major blood supply

Answer 26

thoracodorsal a (a branch of subscapular a)

Question 27

teres major actions

Answer 27

adduction medial rotation extension of arm

Question 28

teres minor innervation

Answer 28

axillary n

Question 29

teres minor blood supply

Answer 29

thoracodorsal a

Question 30

teres minor action

Answer 30

lateral rotation of arm (weak adductor)

Question 31

subscapularis innervation

Answer 31

upper and lower subscapular n

Question 32

subscapularis blood supply

Answer 32

thoracodorsal a (a branch of subscapular a)

Question 33

subscapularis actions

Answer 33

medial rotation of arm

Question 34

anterior fibers of the deltoid perform what action

Answer 34

flex and medially rotate arm

Question 35

middle fibers of the deltoid perform what action

Answer 35

abduct arm

Question 36

posterior fibers of the deltoid perform what action

Answer 36

extend and laterally rotate arm

Question 37

what are the boundaries of the quandrangular space

Answer 37

superior: lateral border of scapula and capsule of shoulder joint Lateral: surgical neck of the humerus Inferior: teres minor Medial: long head of triceps brachii

Question 38

what are the contents of the quadrangular space

Answer 38

axillary n | posterior humeral circumflex artery and vein

Question 39

damage to the spinal accessory nerve would affect what muscle

Answer 39

trapezius affecting scapular rotation, abduction of arm

Question 40

damage to the thoracodorsal nerve would affect what muscle

Answer 40

latissimus dorsi affecting adduction, medial rotation, extension of arm

Question 41

damage to the long thoracic nerve would affect what muscle

Answer 41

serratus anterior affecting scapular protraction, upward rotation

Question 42

damage to the suprascapular nerve would affect what muscle

Answer 42

supraspinatus, infraspinatus, teres major, subscapularis rotator cuff would be messed up lateral/medial rotation of the arm would be affected

Question 43

damage to the axillary n would affect what muscle

Answer 43

teres minor affecting lateral rotation of the arm (and some adduction)

Question 44

rotator cuff muscles

Answer 44

Supraspinatus infraspinatus Teres minor Subscapularis

Question 45

the supraspinatus tendon lies between

Answer 45

acromion process __________ subacromial space 10-12mm