Anatomy - Axilla and Brachial Plexus Flashcards
(32 cards)
First and largest of 3 neurovascular funnels in the upper limb
Axilla (armpit)
Function of the axilla (armpit)
transmit vessels and nerves between the thorax/neck and the upper limb
The axillary fascial sheath contains (3)
axillary artery, vein, brachial plexus
Major early branch of the aorta, crosses underneath the clavicle
subclavian artery
Once the subclavian artery passes underneath the clavicle, it becomes…
axillary artery
Once….
…
Axillary artery can be divided into 3 portions by pectoralis minor
- medial to the muscle
- deep to the muscle
- lateral to the muscle
The first portion of the axillary artery (medial) supplies… (3)
- pectoral muscles
- subclavius
- serratus anterior
The second portion of the axillary artery (deep to) supplies… (5)
- clavicle
- acromion
- deltoid
- pectoral muscles
- serratus anterior
The third portion of the axillary artery has 2 important branches
- anterior circumflex
- posterior ircumflex
The third portion of the axillary artery (lateral) supplies…
Superficial venous drainage of the upper limb happens through 2 main veins
- cephalic
- basilic
Deltopectoral groove, through which the cephalic vein runs
Site of venipuncture (vein)
median cubital vein
The basilic and cephalic veins drain into…
the axillary vein
Paired brachial veins???
What is a plexus?
Network of spinal nerves
Brachial plexus is derived from 5 spinal levels
C5 to T1
Sections of the brachial plexus (5)
- Roots (5)
- Trunks (3)
- Divisions (6) - no branches!
- Cords (3)
- Branches (5)
Supraclavicular branches of the brachial plexus are branches of…
the roots and trunks
The dorsal scapular nerve innervates
rhomboids
levator scapulae
C5, C6, C7 fly to heaven (winged scapula if this nerve is injured)
The nerve to subclavius innervates
subclavius
?
