spinal cord
meninges
pia mater
arachnoid mater
dura mater
subarachnoid space
subdural space
epidural space
the
spinal cord extends to L2 (adults)
cauda equina
31
pairs of spinal nerves
anterior or ventral root
posterior or dorsal root
posterior or dorsal root ganglion
nucleus
gray matter
white matter
anterior (ventral) gray horns
motor
neurons cell bodies and motor nuclei
posterior (dorsal) gray horns
sensory
nuclei
tracts
sensory (ascending) tracts
motor (descending) tracts
reflex
spinal reflex
cranial reflex
reflex arc
sensory
receptor
sensory
neuron
integrating center
motor neuron
effector
somatic reflex
autonomic (visceral) reflex
stretch reflex
muscle spindles
posterior (dorsal) ramus
anterior (ventral) ramus
cervical plexus – supplies what region of the body?
phrenic nerve
brachial plexus – supplies what region of the body?
lumbar plexus – supplies what region of the body?
sacral plexus – supplies what region of the body?
sciatic nerve
intercostal or thoracic nerves
dermatome