spinal cord
lumbar nerves
5 pairs
cervical nerves
8 pairs
ventral horn ( anterior horn)
send motor signals to the spinal nerves
median nerve
wrist flexors, pronator teres and quadratus anterior
thoracic nerves
12 pairs
obturator nerve
adductors, gracilis
musculocutaneous nerve
bicep brachi, coracobrachialis, brachialis anterior
tibial nerve
biceps femoris long head, semimembranosus, semitendinosus, gastrocnemius, soleus anterior
common fibular nerve
biceps femoris short head posterior
cervical plexus
c1-c5 has two nerves the hypoglossal and the phrenic
phrenic nerve
c5 innervates diaphragm breathing
brachial plexus
c5-t1 divides into two divisions anterior and posterior. anterior- ulnar nerve, median nerve, musculocutaneous nerve. posterior- axillary nerve, radial nerve
dorsal root ganglion
contains cell body
axillary nerve
deltoid and teres minor posterior
ulnar nerve
flexor carpi ulnaris, flexor digitorum profundus, adductor pollicis anterior
inferior gluteal nerve
gluteus maximus posterior
superior gluteal nerve
gluteus medius, gluteus minimus posterior division
hypoglossal nerve
its c1 and helps stick out tongue
lumbar plexus
l1-l4 posterior- femoral nerve anterior- obturator nerve
sacral plexus
l4-s5
superficial fibular nerve
peroneus longus and brevis
femoral nerve
quadriceps, Sartorius
dorsal horn (posterior horn)
receive sensory information from the somatic nerves
deep fibular nerve
tibialis anterior. extensor digitorum longus, extensor hallucis longus
radial nerve
triceps, brachioradialis and wrist extensors posterior