lec 9 Flashcards
supraclavicular branches of brachial plexus
long thoracic nerve
suprascapular nerve
dorsal scapular nerve
–>superior to clavicle
–> innovator shoulder and scapula
infraclavicular branches of brachial plexus
inferior to clavicle
in axilla/armpit
musculocutaneous
radial
axillary
median
ulnar
what are the cords in my pneumonic and the nerves that go with and the level of spinal cord
LPM
LATERAL
musculocutanoues (C5,6,7)
POSTERIOR
axillary (C5, C6)
radial (C5-T1)
MEDIAL
ulnar (C8, T1)
LATERAL AND MEDIAL
median (C5-T1)
musculocutanoues nerve
cord origin, spine #s
motor functions
sensory functions
injury site
lateral cord; c567
motor: anterior arm (coracobrachialis, biceps, brachialis)
sensory: skin of anterolateral forearm
I: coracobrachilais
–> continues after passing cubital fossa as lateral cutaneous nerve of forearm
axillary nerve
cord origin, spine #s
motor functions
sensory functions
injury site
c5,6; posterior cord
m: lateral shoulder; deltoid and tires minor
sensory: skin of lateral shoulder
-travels through quadrangular axillary space, wrap around humerus neck
injure at surgical neck of humerus
-atrophy of deltoid
radial nerve
cord origin, spine #s
motor functions
sensory functions
injury site
posterior cord; c5-t1
m: extensors/ posterior of arm and forearm, brachioradialis, supinator
s: skin of posterior arm, forearm, hand (dorsal lateral 3.5 digits)
-radial groove of humerus injury
-radial nerve palsy; wrist drop
-deep branch is motor
-superficial branch is sensory
median nerve
cord origin, spine #s
motor functions
sensory functions
injury site
lateral and medial cords
c5-t1
m: anterior forearm and hand (flexors of wrist and digits 1,2,3), lumbricals 1,2, thenar muscles, pronators of forearm
s: palmar lateral 3.5 digits
-cross elbow at cubital fossa - injure hear
enter hand at carpal tunnel- injure here
carpal tunnel syndrome
-ape hand deformity
ulnar nerve
cord origin, spine #s
motor functions
sensory functions
injury site
medial cord, c8,t1
m: medial forearm and hand
-hand intrinsics (lumbricals 3,4 , hypothernar, palmar and dorsal interosssei)
-s: medial 1.5 digits ((palmar and dorsal surfaces)
-passes posterior to medial epicondyle- injure at funny bone
-ulnar claw hand
-passes hand external to carpal tunnel
sensory innervation of
musculocutanoeus
axillary
radial
median
ulnar
musculocutanoeus: skin of anterolateral forearm
axillary : skin of lateral shoulder
radial: skin of posterior arm, forearm, hand (dorsal lateral 3.5 digits)
median palmar lateral 3.5 digits
ulnar medial 1.5 digits
hand sensory innervation of nerves
radial nerve: dorsal lateral 3.5 digits
median nerve: palmar lateral 3.5 digits
ulnar nerve: medial 1.5 digits (dorsal and palmar surfaces)
ulnar= both sides of pinky 1.5
radial= dorsal 3.5 “RAD NAILS”
median= palmar 3.5 MEATY PALMS
vental/anterior root
posterior/dorsal root
vental/anterior root: motor; efferent OUT OF CNS
(got to vent and get it out)
posterior/dorsal root: sensory; afferent INTO CNS
myotome of c5-t1
c5 deltoid
c6 biceps
c7 triceps
c8 finger flexion
t1 finger abduction
dermatomes of c5-t1
c5 skin of anterior/lateral arm (deltoid)
c6 anterior skin of thumb
c7 anterior skin of digits 2 and 3
c8 skin of digits 4 and 5
t1 skin of antero/medial elbow
* start at lateral arm and make way down to thumb and back around*
deep tendon reflexes
c5 biceps
c6 brachioradialis
c7 triceps
dermatomes and myotomes of c5-t1
myotomes:
c5 deltoid
c6 biceps
c7 triceps
c8 finger flexion
t1 finger abduction
dermatomes:
c5 skin of anterior/lateral arm (deltoid)
c6 anterior skin of thumb
c7 anterior skin of digits 2 and 3
c8 skin of digits 4 and 5
t1 skin of antero/medial elbow
* start at lateral arm and make way down to thumb and back around*
which nerve enters have via carpal tunnel and which doesnt
median through carpal
ulnar externally
artery path
subclavian artery to axillary to brachial to ulnar and radial arteries
subclavian artery
supra scapular artery
axillary artery
3 branches
1. superior thoracic artery
2. thoracic acromial artery
2. lateral thoracic artery
3. sub scapular artyer
3. anterior circumflex humeral artery
3. posterior circumflex humeral artery
between 1st rib and lower border of teres major and pac major
1st part is for thoracic cavity
2nd part covered by muscles to supply lateral thoracic wall and serrates anterior
3rd part for scapular region- attach to proximal end of humerus
once pass inferior border of teres major or pec change name to brachial artery
brachial artery
start at lower border of teres major or pec major
- deep brachial (profound brachii) artery; move posterior to radial groove
-accompannies radial nerve
-supply posterior arm - muscular branches for anterior arm
-passes between ulnar and median nerve in arm
-goes under cubital fossa
which arteries are accompanies by a nerve
brachial artery- radial nerve
ulnar artery- ulnar nerve
arteries of the forearm ulnar and radial
-brachial artery divides into 2 at cubital fossa
ulnar artery: lies under flexor carpi ulnas, accompanied by ulnar nerve
-posterior compartment and wrist
-forms palmar arterial arches
radial artery; supplies lateral forearm
-covered by brachioradialis
-passes through anatomical snuff box forms deep palmar arch
hand arteries
radial artery supplies dorsal hand
radial and ulnar form superficial and deep palmar arterial arch
radial does lateral 1.5 side, ulnar does medial 3.5 side
veins
dorsal venous network in hand
cephalic vein or radial thumb side
basilic vein on ulnar medial side
median cubital vein at elbow
brachial vein
axillary vein
brachiocephalic veins
subclavian veins
internal and external jugular veins
superior vena cava
which side is basilica and cephalic vein on in forearm
cephalic vein or radial thumb side
basilic vein on ulnar medial side
arm transition areas
axilla
cubital fossa
carpal tunnel
borders of cubital fossa *muscles
medial border: pronator muscle
lateral border: brachioradialis
axilla borders
anterior wall; pectoral
posterior wall; scapula
medial walll; 4 upper ribs and serrates anterior
lateral wall; humerus
contents of axilla
axillary artery
axillary vein
infraclavicular part of brachial plexus
axillary lymph nodes
