nerve plexuses (copy)

what are the 4 major nerve plexuses

cervical, lumbar, sacral, and brachial

cervical plexus origin and peripheral nerves

c1-c5. controls ear, neck, and diaphragm;
phrenic nerve - diaphragm
lesser occipital nerve
great auricular nerve
transverse cervical nerve
supraclavicular nerve

brachial plexus origin and peripheral nerves

c5-t1; controls pectoral griddle, upper back, and upper limbs
musculocutaneous
median
ulnar
radial
axillary

musculocutaneous spinal segment

c5-t1

radial spinal segment

c5-t1

median spinal segment

c6-t1

ulnar spinal segment

c8-t1

lateral cord divides into

musculocutaneous and median nerve

medial cord divides into

ulnar and median nerve

posterior cord divides into

radial and axillary nerve

lumbar plexus

t12-L4; pelvic griddle and lower extremities
illiohyopgastric
illio-inguinal
femoral (saphenous)
obturator
genitofemoral
lateral femoral cutaneous nerve

genitofemoral spinal segment

L1-L2

Lateral femoral cutaneous spinal segment

L2-L3

femoral spinal segment

L2-L4

Obturator spinal segment

L2-L4

sacral plexus

L4-S4;
glutes posterior, genitals, and lower extremity
sciatic (fibular and tibial = sural nerves)
pudenal nerve

pudendal nerve spinal segment

s2-s4

sciatic nerve spinal segment

L4-S3

sensory innervation of the foot

saphenous, sural, fibular, and tibial

peripheral innervation of the hand

radial, ulnar, and median nerve

saphenous nerve stems from which nerve

femoral nerve

sural nerve stems from

tibial and fibular nerve