Spinal Cord and Peripheral Nervous System Lab

Anterior (ventral)

Posterior (dorsal)

ceiling/back

gray horns

what is the red butterfly called

anterior gray horns

floor of grey horns

lateral gray horns

middle of gray horns

posterior gray horns

ceiling of gray horns

white columns

each side of the spinal cord has three funiculi (columns): dorsal (posterior) funiculus, lateral funiculus, and ventral (anterior) funiculus, which are further divided into tracts

anterior funiculi

floor of white column

lateral funiculi

middle of white column

posterior funiculi

ceiling of white columns

central canal

A tiny channel found within the spinal cord and inferior medulla oblongata

gray commissure

connects masses of gray matter; encloses central canal

white commissures

connects the white matter of the right and left sides of the spinal cord

anterior median fissure

a groove along the anterior midline of the spinal cord that incompletely divides it into symmetrical halves

posterior median sulcus

a shallow vertical groove dividing the spinal cord throughout its whole length in the midline posteriorly.

meninges

three layers of connective tissue in which the brain and spinal cord are wrapped/ The WHOLE LAYER

epidural space

The yellow stuff on TOP Cushion of fat and network of veins in space between vertebrae and spinal dura mater

dura mater

pink layer

arachnoid mater

the light blue layer

subarachnoid space

The spaces between the purple/ The blue

pia mater

The first top layer/ under the purple stuff

dorsal root

the sensory branch of each spinal nerve

dorsal root ganglion

contains cell bodies of sensory neurons

ventral root

the basal branch of each spinal nerve; carries motor neurons

spinal nerve

a peripheral nerve attached to the spinal cord. Motor and Sensor nerve.

rami

branches of spinal nerves

dorsal ramus

the division of posterior spinal nerves that transmit motor impulses to the posterior trunk muscles and relay sensory impulses from the skin of the back

ventral ramus

what. is the second arrow pointing at?

gray rami communicantes

Carry unmyelinated postganglionic sympathetic axons from trunk to all spinal nerves

sympathetic trunk

nerve running along each side of the vertebral column

sympathetic trunk ganglia

big yellow thing

cervical plexus

C1-C5 supplies neck and phrenic nerve to the diaphragm

brachial plexus

network of interlacing nerves found in the upper arm area

lumbar plexus

lower back nerves

sacral plexus

Serves the buttock, lower limb, pelvic structures, and perineum

cauda equina

"horse's tail", a fan of nerve fibers below the spinal cord

median nerve

Sensory-motor nerve that is smaller than the ulnar and radial nerves and that, with its branches, supplies the arm and hand.

ulnar nerve

Sensory-motor nerve that, with its branches, affects the little-finger side of the arm and palm of the hand.

radial nerve

Sensory-motor nerve that, with its branches, supplies the thumb side of the arm and back of the hand.

femoral nerve

L2-L4

sciatic nerve

S1-S3

intercostal nerves

nerves between the ribs

Pia mater

The orange outer layer

subarachnoid space

arachnoid mater

Dura mater

Gray commissure

cervical plexus

Brachial plexus

lumbar plexus

L1-L4

sacral plexus

L4-S4

ventral ramus

dorsal ramus

ventral root

ventral root

posterior funiculi

sciatic nerve

cauda equina