Brachial plexus Flashcards
Sections of the plexus from largest to smallest
Roots
Trunks
divisions
cords
branches
Where anatomically are roots located?
Located in the posterior triangle
Pass between scalenus anterior and medius
Where anatomically are trunks located?
Posterior to middle third of clavicle
Upper and middle trunks related superiorly to the subclavian artery
Lower trunk passes over 1st rib posterior to the subclavian artery
Where are cords located?
Related to axillary artery
What forms the lateral cord?
C5 and C7
What forms the medial cord?
C6,7,8
What forms the posterior cord?
T1
The lateral cord gives rise to which nerves?
Lateral pectoral nerve
musculocutaneous nerve
What nerves does the posterior cord give rise to?
upper subscapular
thoracodorsal
lower subscapular
axillary nerve
radial nerve
What nerves does the medial cord give rise to?
medial cutaneous nerve of the arm
medial cutaneous nerve of the forearm
ulnar nerve
What nerve is created by the joining of the lateral and medial cords?
Median nerve
