Brachial Plexus Flashcards
What are the roots of the brachial plexus?
C5-T1
What are the trunks of the brachial plexus?
superior, middle, inferior
What are the divisions of the brachial plexus?
anterior and posterior
What are the cords of the brachial plexus?
lateral, medial, and posterior
The ventral rami of C5/C6 unite to form the….
superior trunk
The ventral rami of C7 continues as….
middle trunk
The ventral rami of C8/T1 unites to form the….
inferior trunk
Each trunk splits into an anterior and posterior division. The anterior divisions usually supply….
flexor muscles
Each trunk splits into an anterior and posterior division. The posterior divisions usually supply….
extensor muscles
The anterior divisions of the upper and middle trunks unite to form the….
lateral cord
The anterior division of the lower trunk forms the….
medial cord
All 3 posterior divisions from each of the 3 cords all unite to form the….
posterior cord
What are the terminal branches of the brachial plexus?
-musculocutaneous
-median
-ulnar
-radial
-axillary
The musculocutaneous nerve arises from which cord of the brachial plexus?
lateral (C5-C7)
The median nerve arises from the….
medial and lateral cords (C5-T1)
The ulnar nerve arises from the…
median cord (C7-T1)
The radial nerve arises from the…
posterior cord (C5-T1)
The axillary nerve arises from the….
superior trunk, posterior division, posterior cord (C5/C6)
The dorsal scapular nerve arises from….
C5
The long thoracic n. arises from….
C5-C7
The suprascapular nerve arises from….
superior trunk (C5/C6)
The lateral pectoral nerve arises from….
lateral cord (C5-C7)
The medial pectoral nerve arises from….
medial cord (C8/T1)
