brachial plexus Flashcards
medial to lateral divisions
Roots
Trunks
Divisions
Cords
superior trunk
C5 and C6
middle trunk
C7
inferior trunk
C8 and T1
cords are in relationship to?
axillary artery
lateral cord
anterior divisions of superior and middle trunks
C5,C6,C7
medial cord
anterior division of inferior trunk
C8 and T1
posterior cord
posterior division of all 3 trunks
C5-T1
what nerve branches off the C5 root?
dorsal scapular
what muscles does the dorsal scapular supply?
rhomboids
levator scapula
what nerve is formed from the C5-C7 roots?
long thoracic
what muscle does the long thoracic nerve supply?
serratus anterior
what nerves branch off the superior trunk?
suprascapular
nerve to subclavius
C5 and C6
what nerves are off the lateral cord?
lateral pectoral
musculocutaneous
median
C5, C6, C7
what nerves are off the medial cord?
ulnar median medial pectoral medial cutaneous nerve of the forearm medial antebrachial
C8 and T1
what nerves are off the posterior cord?
axillary radial superior subscapular inferior subscapular thoracodorsal
all roots
what nerve supplies the pectoralis major only?
lateral pectoral- lateral cord
C5, C6, C7
what muscles does the musculocutaneous nerve supply?
coracobrachialis
brachialis
biceps brachii
lateral cord- C5, C6, C7
what does the musculocutaneous nerve continue as?
lateral cutaneous nerve of the forearm
what nerve supplies both the pec major and minor?
medial pectoral nerve- medial cord
C8 and T1
what 2 muscles of the forearm does the ulnar nerve supply?
flexor carpi ulnaris
flexor digitorum profundus- medial half
C8, T1 sometimes C7
what do the sensory branches of the ulnar nerve supply?
ulnar side posterior hand
hypothenar eminence
palmar side- little finger and half of ring finger
what is the sensory supply of the median nerve?
palmar side- half of 2nd digit, 3,4 and part of thumb
tips of 2-4 digits
what nerve supplies the teres major?
inferior subscapular
