Nerve innervations and pathways Flashcards
what spinal nerves for the brachial plexus?
C5-C8/T1
what are the three trunks of the brachial plexus?
superior
middle
inferior
what are the three cords of the brachial plexus?
lateral
posterior
medial
where do the roots of the brachial plexus pass through?
gap between anterior and middle scalene and subclavian artery
where does the axillary originate?
C5-C6
what does the axillary nerve innervate?
deltoid
teres minor
super-lateral skin of arm
where does the musculocutaneous nerve originate?
C5-C7
what does the musculocutaneous nerve innervate?
coracobrachialis
bicep brachii
brachialis
lateral skin of forearm
where does the radial nerve originate?
C5-T1
what does the radial nerve innervate?
posterior arm and forearm
skin of the posterior and inferolateral arm
posterior forearm skin and dorsum of hand
proximal lateral 3 1/2 digits
where does the median nerve originate?
lateral root: C6-C7
medial root: C8-T1
what does the median nerve innervate?
-anterior forearm
-skin of the palm and Palmer and distal dorsal aspect of lateral 3 1/2 digits
-NOT the flexor carpi ulnas and ulnar half of flexor digiturm profundus
-intrinsic muscle
where does the ulnar nerve originate?
C8-T1
what does the ulnar nerve innervate?
flexor digitorum ulnaris and ulnar half of flexor digtiorum profundus
intrinsic muscles of the Hand
skin of the hand medial and medial 1 1/2 digits
where does the lateral pectoral nerve innervate?
pectorals major
where does medial pectoral nerve innervate?
pectoralis minor and sternocostal part of pectorals major
where does the upper subscapular nerve innervate?
superior portion of subsacpularis
where does the lower sub scapular nerve innervate?
inferior portion of subscapularis and teres minor
where does the thoracodorsal nerve innervate?
latissimus dorsi
where does the dorsal scapular nerve innervate?
rhomboids
where does the long thoracic nerve innervate?
serrates anterior
where does the suprascapular nerve innervate?
supraspinatus
infraspinatus
GH
where does the subclavian nerve innervate?
subclavius and SC
where are most nerves of the upper limbs derived from?
brachial plexus
where are the nerves of the shoulder derived from?
cervical plexus
what does the supraclavicular nerve supply?
skin over clavicle and superolateral pec. major
what does the superior lateral cutaneous nerve of the arm supply?
lower deltoid and lateral mid arm
what does the inferior lateral cutaneous nerve of the arm supply?
skin over the inferolateral aspect of the arm
where does the intercostobrachial nerve supply?
skin over axilla and medial aspect of the arm
where does the lumbar plexus arise from?
L1-L4
what structures does the lumbar plexus pass?
superficial and deep psoas major
anterior QL
where does the lumbar plexus supply?
anterolateral abdominal wall
external genitalia
lower limbs (parts)
where does the femoral nerve originate?
L2-L4
what does the femoral nerve innervate?
lliacus
flexors of the hip
extensors of knee
where does the obturator nerve originate?
L2-L4
what does the obturator nerve innervate?
adductor muscles
where does the lumbosarcal trunk originate?
L4-L5
where does the lateral cutaneous of the thigh nerve supply?
anterior lateral thigh
where does the anterior cutaneous nerve of the thigh supply?
anterior and medial thigh
what makes up the sacral plexus?
L4-S4
where is the sacral plexus located?
lesser pelvis through the great sciatic foramen
where does the sciatic nerve originate?
L4-S3
where does the sciatic nerve originate?
hip joint
flexors of the knee
all muscles of the leg and foot
what is the largest nerve in the body?
sciatic
where does the sciatic nerve split into the tibial and common fibular nerve?
popliteal fossa
what nerve supplies the long head of bicep femoris?
tibial branch
what nerve supplies the short head of bicep femoris?
fibular branch
where does the pudendal nerve originate?
S2-S4
what does the pudendal nerve innervate?
structures of perineum
sensations of external gantialia
perineal muscles
external urethral sphincter
external anal sphincter
where does the superior gluteal nerve originate?
L4-S1
what does the superior gluteal nerve innervate?
glut med
glut min
tensor fasciae latae
where does the inferior gluteal nerve originate?
L5-S2
what does the inferior gluteal nerve innervate?
glut max
where does the saphenous nerve originate?
femoral nerve
what does the saphenous nerve innervate?
skin of the medial ankle and foot
where does the tibial nerve originate?
sciatic nerve
what does the tibial nerve supply?
posterior muscles of the leg and knee joint
where does the common fibular nerve originate?
sciatic nerve
what does the common fibular nerve innervate ?
lateral posterior leg and knee joint
where does the superficial fibular nerve originate?
common fibular nerve
what does the superficial fibular nerve innervate?
fib long and brevis
skin on distal third of anterior surface of the leg and dorsum of foot
where does the deep fibular nerve originate?
common fibular nerve
where does the deep fibular nerve innervate?
anterior muscles of the leg and dorsum foot
supplies skim of 1st interdigital cleft
what nerve winds around the humerus to the deep deltoid?
axillary
