5/31-6-1 a/n

Question 1

brachial plexus

Answer 1

roots: C5-T1
- dorsal scular nerve C5
- long thoracic nerve C5-T1

trunks

• superiorC5-C6: suprascapular nerve, subclavian nerve
• middleC7
• inferior C8T1

Divisions
-inferior trunk AD: medial pectoral nerve

Cord

• lateral (sup n middle AD): lateral pectoral nerve
• posterior(all PD): upper subscapular, thoracodorsal, lower scapula
• medial(inf AD): medial cutaneous arm, medial cutaneous forearm

terminal nerves

• musculocutaneous: lateral cord
• median: lateral and medial cord
• ulnar: medial cord
• rasial: posterior cord

Question 2

subclavian artery

Answer 2

• right branches brachiocephalic trunk
• left branches off arch of aorta
• below clavicle
• ends at first rib lateral edge and continue as axillary artery

Question 3

parts of axillary artery

Answer 3

first part

• begins at lateral border of 1st rib
• medial border of pectoralis minor
• superior thoracic artery

2nd

• lies posterior to pectoralis minor
• thoracoacromial a: pass medially to pec minor
• lateral thoracic a: laterally to minor

3rd

• from lateral border of pec minor to inferior border of teres major
• subscapular a: largest branch of axillary, give rise to thoracodorsal
• anterior circumflex humeral a
• posterior circumflex humeal a

Question 4

superior thoracic

Answer 4

• runs anteromedially along superior border of pec minor
• pass btw minor and major to thoracic wall
• supply intercostal spaces and sup part of serratus anterior

Question 5

thoacoacromial

Answer 5

• curls around superiomedial border of pec minor
• pierces costocoracoid membrane (clavipectoral fascia)
• divided into pectoral, deltoid, acromial, clavicular

Question 6

lateral thoracic artery

Answer 6

• descends along axillary nerve border of pec minor
• follows it onto thoracic wall
• supply lateral breast

Question 7

anterior posterior circumflex humeral arteries

Answer 7

• encircle surgical of humerus
• anastomosing with each laterally
• larger posterior branch transerses quadrangular space

Question 8

subscapular

Answer 8

• descend from level of inferior border of subscapularis along lateral border of scapula
• divided into circumflex scapular and thoracodorsal arteries

Question 9

brachial artery

Answer 9

• begins at inferior border of teres major
• ends in cubital fossa opposite the neck of radius under bicipital aponeurosis
• lie anterior to triceps and brachialis
• divided into radial and ulnar artery
• main supply to arm and

Question 10

cephalic vein

Answer 10

• along lateral wrist and anterolateral surface of forearm and arm
• join basilic vein by median cubital vein
• sup pass btw deltoid and pec major
• pierce costacoracoid membrane and joins terminal part of axillary v

Question 11

basilic vein

Answer 11

• medial side of forearm and inferior of arm
• pierces brachi fascia
• runs superiorly parallel to brachial artery
• merges with other veins of bracizl artery to form axillary vein