nerve plexus - anatomy

anatomy exam 2

what are the 4 nerve plexuses

cervical, thoracic, lumbar, sacral

CERVICAL PLEXUS

C1-C5

cranial nerves

come off the brain stem

great articular nerve

sensation to the neck

transverse cervical nerve

sensation to the triangle of the neck

ansa cervicalis nerve

inervate laryngeal muscles

phrenic nerve

intervate diaphragm

nerves to rhomboids

retract the scapula

supraclavicular nerve

sensation to upper neck, shoulders

lesser occipital nerves

sensory to head, neck

BRACHIAL PLEXUS

READ THE DAMN CADAVER NOTES

rami (roots), trunk (superior.middle,inferior), divisions, cords, nerves

radial nerves

get contributions from sup, middle, and inf trunks

axillary nerve

motor for deltoid muscle, sensory for shoulder skin

musculocutaneous

motor for flexor muscle, sensory for lateral skin of forearm

median nerve

motor for forearm muscle, sensory for anterolateral surface of hand

ulnar nerve

motor for flexor carpi ulnaris and small finger muscles, sensory for skin over hand

dorsal scapular nerve

rhomboid, levator

long thoracic nerve

serratus anterior

suprascapular nerve

supraspinatus and infraspinatus

pectoral nerve

pectoralis

thoracodorsal nerve

latissimus dorsi

LUMBAR PLEXUS

iliohypogastric nerve

for abs, sensory for skin over inferior abdomen and glutes

ilio-inguinal nerve

sensory from skin on superior and medial thigh + external genitilia

lateral femoral nerve

sensory for anterior, medical, and posterior thigh

genitofemoral nerve

sensory for anteromedial surface of thigh and external genetilia

femoral nerve

motor for quad,femoris and sensory for medial surface of leg

obturator nerve

innervates obturator externus

SACRAL PLEXUS

superior gluteal nerve

motor for gluteus minimus and tensor fascie

inferior gluteal nerve

motor for gluteus maximus

sciatic nerve

branches into tibial and fibular nerve. motor for semimermer, semitendinosus (random big s words)

posterior femoral cutaneous

sensory for perinium and posterior thigh and leg

pudendal nerve

motor for perineum, ext anal sphincter, urethral sphincter