lecture 8 - axilla brachial plexus

Question 1

axilla walls - apex

Answer 1

“armpit”

Question 2

axilla walls - base

Answer 2

formed by skin

Question 3

anterior wall of the axilla walls?

Answer 3

pectoralis major and minor

Question 4

what forms the lateral wall of the axilla walls?

Answer 4

pectoralis minor and major

Question 5

what forms the medial wall of the axilla walls?

Answer 5

serratus anterior and rib cage [4th rib]

Question 6

what forms the posterior wall of the axilla walls?

Answer 6

lat dorsi, subscapularis, teres major

Question 7

what are the roots of the brachial plexus?

Answer 7

anterior rami of…
-c5
-c6
-c7
-c8
-t1

Question 8

R T D C B

Answer 8

R- rami
T -trunk
D - division
C - cords
B- branches

Question 9

trunk sections..

Answer 9

superior, middle, inferior

Question 10

divisions sections…

Answer 10

3 anterior and 3 posterior

Question 11

cords sections…

Answer 11

lateral, posterior, medial

Question 12

branches sections…

Answer 12

5 peripheral nerves

Question 13

subclavius MA

Answer 13

• depresses and anchors clavicle

Question 14

subclavius PA

Answer 14

junction of first rib and its costal cartilage

Question 15

subclavius DA

Answer 15

inferior surface of middle surface of clavicle

Question 16

subclavius nerve

Answer 16

subclavian nerve [c5.c6] nerve to subclavius

Question 17

anterior scalene nerve

Answer 17

cervical spinal nerve c4 to c6

Question 18

anterior scalene MA

Answer 18

• flex neck laterally
• elevates first rib during forced inhalation

Question 19

middle scalene MA

Answer 19

• flex neck laterally
• elevates first rib during forced inhalation

Question 20

what are the IA for the anterior and middle scalenes?

Answer 20

first ribs!

Question 21

middle scalene nerve

Answer 21

anterior rami of cervical spinal nerves

Question 22

posterior scalene MA

Answer 22

flex neck laterally
elevated SECOND rib during forced inhalation

Question 23

posterior scalene IA

Answer 23

external border of 2nd rib

Question 24

what is thoracic outlet syndrome?

Answer 24

compression of nerves, arteries, and veins in thoracic outlet

Question 25

how does thoracic outlet occur?

Answer 25

occurs via compression in space between the clavicle and 1st rib, pec minor, or the presence of a cervical rib

Question 26

quadrangular space

Answer 26

an anatomical conduit for neurovascular structures to pass from anterior axillary region to posterior scapular region

Question 27

quadrangular space - inferior margin

Answer 27

teres minor

Question 28

quadrangular space - superior margin

Answer 28

teres major

Question 29

quadrangular space - lateral margin

Answer 29

long head of the triceps brachii

Question 30

quadrangular space - contents

Answer 30

- posterior circumflex humeral artery and vein - axillary nerve

Question 31

triangular space margins medial margin: superior margin: inferior margin:

Answer 31

medial margin: long head of biceps brachii superior margin: teres major inferior margin: teres minor

Question 32

triangular space contents

Answer 32

circumflex scapular artery and vein

Question 33

triangular interval margins lateral margins: inferior margin

Answer 33

lateral margin: long head of triceps brachii & shaft of humerus inferior margin: teres major

Question 34

triangular interval contents

Answer 34

profunda brachii artery & radial nerve

Question 35

what is the only synovial joint articulation between UE and axial skeleton?

Answer 35

sternoclavicular joint

Question 36

what are the 3 muscles of the flexor compartment?

Answer 36

BBC B - brachialis B - iceps brachii C - coracobrachialis

Question 37

main blood supply of UE?

Answer 37

brachial artery

Question 38

what is the main action of the biceps brachii?

Answer 38

supination of the arm

Question 39

Biceps brachii MA

Answer 39

- *supination of the arm - flexes forearm - short head resists dislocation of shoulder

Question 40

biceps brachii PA

Answer 40

- Short head: coracoid process - Long head: supraglenoid tubercle & labrum

Question 41

biceps brachii DA

Answer 41

radial tuberosity and fascia of forearm via bicipital aponeurosis

Question 42

biceps brachii nerve

Answer 42

musculocutaneous nerve (c5,c6*,c7)

Question 43

what muscles attach to the coracoid process?

Answer 43

coracoid brachialis biceps brachii short head pectoralis minor

Question 44

coracobrachialis MA

Answer 44

- flexes scapula - adduct shoulder - resists dislocation of shoulder

Question 45

coracobrachialis PA

Answer 45

coracoid process

Question 46

coracobrachialis DA

Answer 46

middle third of medial surface of humerus

Question 47

coracobrachialis nerve

Answer 47

musculocutaneous nerve c5,c6*,c7

Question 48

who is the skrongest flexor of the elbow

Answer 48

brachialis

Question 49

brachialis MA

Answer 49

flexes elbow in all positions - humorolnar joint

Question 50

brachialis PA

Answer 50

distal half of anterior surface of humerus

Question 51

brachialis DA

Answer 51

ulnar tuberosity and coronoid process of ulna

Question 52

brachialis nerves

Answer 52

- musculocutaneous nerve (C5 & c6) & small branch from radial (c5 & c7)

Question 53

Triceps brachii MA

Answer 53

chief extensor of forearm/elbow long head resists dislocation of humerus, especially during adduction

Question 54

Triceps brachii PA

Answer 54

long head: infraglenoid tubercle lateral head: posterior humerus, superior to radial groove medial head: posterior humerus, inferior to radial groove

Question 55

Triceps brachii DA

Answer 55

olecranon of ulna

Question 56

Triceps brachii nerve

Answer 56

radial nerve (c6,c7,c8)

Question 57

what nerve supplies the entire posterior compartment?

Answer 57

radial nerve

Question 58

deep radial nerve changes name to...

Answer 58

posterior interosseous nerve [PIN]

Question 59

radial nerve levels

Answer 59

c5.c6.c7.c8.t1

Question 60

musculocutaneous level

Answer 60

c5.c6.c7

Question 61

axillary nerve levels

Answer 61

c5.c6