E1A

Question 1

posterior axioappendicular muscles

Answer 1

trapezius
latissimus dorsi
levator scapulae
rhomboids major/minor

Question 2

anterior axioappendicular muscles

Answer 2

pectoralis major/minor
subclavius
serratus anterior

Question 3

pectorals major origin

Answer 3

clavicular: medial half clavicle
sternocostal: sternum, upper 6 costal cartilages
abdominal: aponeurosis of EO muscle

Question 4

pectoralis major insertion

Answer 4

intertubercular groove (lateral) of humerus (greater tubercle)

Question 5

pectoralis major innervation

Answer 5

medial and lateral pectoral nerves

Question 6

pectoralis major action

Answer 6

flexion, adduction, medial rotation of arm

assists in forced inspiration

Question 7

pectoralis minor origin

Answer 7

ribs 3, 4, 5

Question 8

pectoralis minor insertion

Answer 8

coracoid process

Question 9

pectoralis minor innervation

Answer 9

medial pectoral nerve

Question 10

pectoralis minor action

Answer 10

protraction, inferior rotation of scapula

assists in forced inspiration

Question 11

subclavius origin

Answer 11

1st rib/costal cartilage

Question 12

subclavius insertion

Answer 12

inferior surface of middle third of clavicle

Question 13

subclavius innervation

Answer 13

nerve to subclavius

Question 14

subclavius action

Answer 14

depresses clavicle

braces clavicle against sternum

Question 15

serratus anterior origin

Answer 15

external surface of upper 8-9 ribs

Question 16

serratus anterior insertion

Answer 16

anterior surface of medial border/inferior angle of scapula

Question 17

serratus anterior innervation

Answer 17

long thoracic nerve

Question 18

serratus anterior action

Answer 18

protracts scapula, holds against thoracic wall

rotates scapula superiorly (full abduction of arm)

Question 19

serratus anterior paralysis

Answer 19

winged scapula

medial border and inferior angle protrude posteriorly

Question 20

scapulohumeral (intrinsic) muscles

Answer 20

deltoid
supraspinatus
infraspinatus
teres major/minor
subscapularis

Question 21

deltoid origin

Answer 21

clavicular: lateral 1/3 of clavicle
acromial: acromion
spinal: spine of scapula

Question 22

deltoid insertion

Answer 22

deltoid tuberosity (lateral surface of shaft)

Question 23

deltoid innervation

Answer 23

axillary nerve

Question 24

deltoid action

Answer 24

abduction of arm
medial rotation (anterior fibers)
lateral rotation (posterior fibers)

Question 25

supraspinatus origin

Answer 25

supraspinatus fossa of scapula

Question 26

supraspinatus insertion

Answer 26

greater tubercle of humerus (upper facet)

Question 27

supraspinatus innervation

Answer 27

suprascapular nerve

Question 28

supraspinatus action

Answer 28

stabilize shoulder joint

initiates/assists deltoid in abduction

Question 29

infraspinatus origin

Answer 29

infraspinatus fossa of scapula

Question 30

infraspinatus insertion

Answer 30

greater tubercle of humerus (middle facet)

Question 31

infraspinatus innervation

Answer 31

suprascapular nerve

Question 32

infraspinatus action

Answer 32

stabilize shoulder joint

lateral rotation of arm

Question 33

teres minor origin

Answer 33

middle lateral border scapula

Question 34

teres minor insertion

Answer 34

greater tubercle of humerus (lower facet)

Question 35

teres minor innervation

Answer 35

axillary nerve

Question 36

teres minor action

Answer 36

stabilize shoulder joint

lateral rotation of arm

Question 37

teres major origin

Answer 37

lower lateral border, posterior inferior angle of scapula

Question 38

teres major insertion

Answer 38

intertubercular groove (medial lip) of humerus (lesser tubercle)

Question 39

teres major innervation

Answer 39

lower subscapular nerve

Question 40

teres major action

Answer 40

medial rotation, extension, adduction of arm

Question 41

subscapularis origin

Answer 41

subscapular fossa

Question 42

subscapularis insertion

Answer 42

lesser tubercle of humerus

Question 43

subscapularis action

Answer 43

stabilize shoulder joint

medial rotation of arm

Question 44

rotator cuff

Answer 44

supraspinatus (superiorly)
infraspinatus (posteriorly)
teres minor (posteriorly)
subscapularis (anteriorly)

Question 45

quadrangular space

Answer 45

communicates axilla with posterior aspect of shoulder

Question 46

quadrangular space boundaries

Answer 46

superior: teres minor
inferior: teres major
medial: LH biceps
lateral: humerus

Question 47

quadrangular space function

Answer 47

transmits axillary nerve and posterior circumflex humeral vessels

Question 48

triangular space

upper triangular

Answer 48

smaller space located medial to quadrangular space

Question 49

triangular space boundaries

Answer 49

superior: teres minor
inferior: teres major
lateral: LH biceps

Question 50

triangular space function

Answer 50

transmits circumflex scapular vessels

Question 51

triangular interval boundaries

lower triangular space

Answer 51

superior: teres major
medial: LH triceps
lateral: shaft of humerus

Question 52

triangular interval function

Answer 52

transmit radial nerve and profunda brachii vessels to reach posterior compartment of arm

Question 53

axillary nerve

Answer 53

originates from posterior cord of brachial plexus in axilla
ventral rami of C56
passes posteriorly through quadrangular space inferior to shoulder joint

Question 54

axillary nerve branches

Answer 54

muscular: deltoid, teres minor
articular: shoulder joint
cutaneous: upper lateral cutaneous nerve