upper limb anatomy Flashcards
what spinal roots does the brachial plexus enter out of
C5-T1
what roots does the musculocutaneous nerve come from
C5-7
movement musculocutaneous nerve
elbow flexion + suppination
sensory musculocutaneous nerve
lateral forarm
common injury to musculocutaneous nerve
usually brachial plexus injury
axillary nerve roots
C5,6
axillary nerve motor
shoulder abduction (deltoid)
sensory axillary nerve
inferior region deltoid (badge patch)
injury to axillary nerve
humeral neck fracture/ dislocation –> flat deltoid
radial nerve roots
C5-8
motor radial nerve
extension of forearm, wrist, finger, thumb
sensory radial nerve
dorsal aspect between thumb and pointer finger
injury to radial nerve
humeral midshaft fracture –> wrist drop
median nerve motor
LOAF muscles - supply to most of muscles in anterior forearm (abduction, flexion, opponation thumb)
median nerve sensory
palmer 3.5 lateral fingers
wrist injurt to median nerve
carpal tunnel –> paralysis of thumb muscles
elbow injury median nerve
loss of pronation, weak flexion
ulnar nerve motor
intrinsic hand except LOAF - finger extension
sensory ulnar nerve
medial 1.5 fingers
damage ulnar nerve
medial epicondlye fracture –> claw hand
long thoracic nerve innervation
serratus anterior
long thoracic injury
during sport blow to ribs/ mastectomy –> winged scapula
muscles of rotator cuff
SItS // supraspinatus, infraspinatus, teres minor, subsacpularis
most commonly injured rotator cuff muscles
supraspinatus
which rotator cuff muscle abducts the arm
supraspinatus
which rotator cuff muscles adduct to the arm
teres minor and subscapularis
which rotator cuff muscles medially rotate the arm
supscapularis
which rotator cuff muscles laterally rotate the arm
infraspinatus, teres minor
