Upper Limb

Question 1

Branches of axillary artery

Answer 1

Superior thoracic artery
Thoracoacromial artery
Lateral thoracic artery
Subscapular artery
Anterior circumflex humeral artery
Posterior circumflex humeral artery

Question 2

Superior thoracic artery

Answer 2

• small branch
• passes between two pectoral muscles
• supplies these muscles and thoracic wall

Question 3

Thoracoacromial artery

Answer 3

-emerges from pectoralis minor
-pierces clavipectoral fascia
Branches:
1. PECTORAL branch between pectoral muscles.
2. DELTOID branch in deltopectoral groove along with cephalic vein.
3.ACROMIAL branch crosses coracoid and anastamoses around acromion process.
4. CLAVICULAR branch supplies acromioclavicular joint and subclavius.

Question 4

Lateral thoracic artery

Answer 4

Runs along lower border of pectoralis minor in relation with axillary lymph nodes

In females, it is large and gives of lateral mammary branches of breast

Question 5

Subscapular artery

Answer 5

• runs along lower border of subscapularis
• supplies lattisimus dorsi and serratus anterior
• gives of circumflex scapular artery
• winds between two slips of teres minor
• gives branch to subscapular fossa and infraspinous fossa

Question 6

Erb’s paralysis

Answer 6

-Erb’s point in upper trunk of brachial plexus where 6 nerves meet.

CAUSES:

• birth injury
• fall on the shoulder
• during anaesthesia
• mainly C5 and partly C6
• Mainly biceps, deltoid, brachialis, brachioradialis.
• Partly infraspinatus, supraspinatus, supinator.

DISABILITY:

• Abduction and lateral rotation
• flexion and supination
• biceps
• sensations over deltoid

Question 7

Klumpke’s paralysis

Answer 7

• lower trunk of brachial plexus
• undue abduction of arm

-mainly T1 and partially C8