lecture 3 brachial plexus Flashcards
axilla
armpit
what do the nerevs of the arm wrap around
the subclavian artery
what drains into the lymph nodesof the axilla
the breast and arms
dorsal roots carry
sensory information
ventral roots carry
motor info
when do the dosral and ventral roots fuse
before they leave the spinal column as the spinal nerve
how does the spinal nerve exit the spinal column
as dorsal and ventral rami
how many cervical vertebrae
7
roots of the brachial plexus
C5, C6, C7, C8, T1
what makes up the superior trunk
C5 C6
middle trunk
C7
inferior trunk
C8, T1
what do all the trunks have in common
anterior and posterior division
anterior division of the trunk supplies
flexors
adductors
posterior division supplies
extensors
abductors
what is the lateral cord made up of
super and middle anteriors
posterior divisions of the trunk becomes
posterior cord
inferior tunk anterior division becomes
median cord
lateral cord –>
musculocutaneous, median nerve
what comes together to make the median nerve
lateral and median cords
median cord –>
median and ulnar
posterior cord –>
radial and axillary
what does the radial nerve supply
extensors of the upper limb
in fractures of the surgical neck of the humerus what can be damaged
axillary nerve
