The Axilla and Brachial Plexus Flashcards
How are the medial, posterior and anterior borders of the Axilla defined?
Medially: Serratus anterior
Posteriorly: Subscapular muscles
Anteriorly: Pectoral muscles
What are the borders of the Apex of the Axilla?
By first rib
Posterior surface of clavicle
Superior margin of scapula
What are the contents of the Axilla?
Axillary vessels
Axillary lymphatics
Brachial plexus
What are the Axillary lymph node groups? 5 in total
- Lateral
- Subscapular
- Pectoral
- Central
- Apical
The Brachial Plexus has five anatomical sections - what are they?
“Real Texans Drink Cold Beer”
Roots Trunks Divisions Cords Branches
The Brachial Plexus includes what roots?
C5, C6, C7, C8, T1
What are the five branches of the Brachial Plexus? MAMRU
Musculoskeletal Axillary Medial Radial Ulnar
What motor components of the arm does the Radial nerve supply?
Extensors in the Dorsal compartment
What motor components of the arm does the Musculocutaneous nerve supply?
Flexors of upper arm in the Ventral compartment
What motor components of the arm does the Median nerve supply?
Flexors of the forearm and hand in the Ventral compartment
What motor components of the arm does the Ulnar nerve supply?
Flexors of the forearm and hand in the Ventral compartment (ulnar side)
What motor components of the arm does the Median nerve supply?
Flexors of the forearm and hand in the Ventral compartment (radial side)
What is Erb’s Palsy?
Damage to the C5-C6 trunk of nerves (Upper Brachial plexus)
How is Erb’s Palsy common caused?
Shoulder dystocia during birth
What is Klumpke’s Palsy?
Palsy of the lower roots of the Brachial plexus
