upper limb-scapular region

Question 1

where do the nerves that supply the upper limb arise from?

Answer 1

anterior rami of spinal nerves from cord segments C5-T1

Question 2

what artery crosses the first rib

Answer 2

subclavian artery

Question 3

where does the axillary artery cross

Answer 3

the lower border of teres major muscle

Question 4

what artery divides at the cubital fossa

Answer 4

brachial artery divides into radial and ulnar arteries

Question 5

what are the upper limb pulse points

Answer 5

-axillary pulse (armpit)
-radial pulse in distal forearm
-ulnar pulse in distal forearm
-brachial pulse in cubital fossa
-brachial pulse in mid-arm
-radial pulse in anatomical snuff box

Question 6

what sides are basilic and cephalic veins on?

Answer 6

basilic- medial
cephalic- lateral

Question 7

what vein is the site of venipuncture?

Answer 7

median cubital vein

Question 8

supraspinatus nerve and action?

Answer 8

suprascapular nerve
initiates abduction

Question 9

infraspinatus nerve and action?

Answer 9

suprascapular nerve
laterally rotate humerus

Question 10

subscapularis nerve and action?

Answer 10

upper and lower subscapular nerves
medially rotate humerus

Question 11

teres minor nerve and action?

Answer 11

axillary nerve
laterally rotate humerus

Question 12

teres major nerve and action?

Answer 12

lower subscapular nerve
medially rotate and extension

Question 13

what muscles stabilize the shoulder joint in order to prevent dislocation of head of the humerus from the glenoid fossa?

Answer 13

supraspinatus
infraspinatus
subscapularis
teres minor

Question 14

what nerve innervates the deltoid muscle?

Answer 14

axillary

Question 15

what are the actions of the anterior, middle, and posterior fibers of the deltoid muscle?

Answer 15

anterior: flex/medial rotation
middle: abduction
posterior: extend/lateral rotation

Question 16

what vessels are present in the deltoid region?

Answer 16

-thoracoacromial trunk
-circumflex scapular artery
-anterior and posterior humeral circumflex artery
-suprascapular artery
-deep brachial artery

Question 17

where does the axillary artery begin and end?

Answer 17

-begins at the lower border of 1st rib (continuation of subclavian artery)
-ends at the lower border of the teres major muscle and becomes the brachial artery

Question 18

what muscles divides the axillary artery into 3 parts

Answer 18

pectoralis minor

Question 19

what artery is the 1st division of the axillary artery?

Answer 19

superior thoracic artery

Question 20

what arteries make up the 2nd division of the axillary artery?

Answer 20

thoracoacromial trunk
lateral thoracic artery

Question 21

what arteries make up the 3rd division of the axillary artery?

Answer 21

subscapular artery
anterior humeral circumflex artery
posterior humeral circumflex artery

Question 22

where does the brachial artery begin and end?

Answer 22

-begins at the lower border of teres major (continuation of the axillary artery)
-ends in front of cubital fossa

Question 23

what are the branches of the brachial artery in the flexor compartment?

Answer 23

superior and inferior collateral arteries

Question 24

what are the branches of the brachial artery in the extensor compartment?

Answer 24

profunda brachii artery
middle collateral artery
radial collateral artery

Question 25

what are the terminal branches of the brachial artery?

Answer 25

radial artery ulnar artery

Question 26

biceps brachii action

Answer 26

-flex at shoulder and elbow -most powerful supinator at the elbow

Question 27

coracobrachialis muscle action

Answer 27

-flex at shoulder only -adduct arm

Question 28

brachialis muscle action

Answer 28

most powerful flexor at the elbow

Question 29

lateral cord of the brachial plexus

Answer 29

musculocutaneous nerve

Question 30

what nerve innervates the triceps brachii

Answer 30

radial nerve

Question 31

posterior cord of the brachial plexus

Answer 31

radial nerve

Question 32

what artery supplies the triceps brachii

Answer 32

profunda brachii artery

Question 33

what are the boundaries of the quadrangular space?

Answer 33

medial-long head of the triceps brachii lateral-humerus superior- teres minor tendon inferior-teres major tendon

Question 34

what artery and nerve run through the quadrangular space?

Answer 34

axillary nerve posterior humeral circumflex artery

Question 35

what are the boundaries of the triangular space?

Answer 35

lateral- long head triceps brachii superior- teres minor tendon inferior- teres major tendon

Question 36

what artery runs through the triangular space?

Answer 36

circumflex scapular artery

Question 37

what are the boundaries of the triangular interval?

Answer 37

medial- long head of triceps brachii lateral- lateral head of triceps brachii superior- teres major tendon

Question 38

what nerve and artery run through the triangular interval?

Answer 38

radial nerve profunda brachii artery