Nervous System

Question 1

Prominent split on the cord’s anterior side

Answer 1

Anterior median fissure

Question 2

Shallow groove on the cord’s posterior side

Answer 2

Posterior median sulcus

Question 3

Meninges

Answer 3

Three-layered membrane that protects posterior cavities

Question 4

Dura mater

Answer 4

Most superficial layer of meninges

Tough and durable

Question 5

Arachnoid mater

Answer 5

Deep to dura mater

Web-like wrapping

Question 6

Pia mater

Answer 6

Deepest covering of meninges
Tightly attached to spinal cord
Delicate, slippery

Question 7

Subarachnoid space

Answer 7

Deep to arachnoid mater.

Filled with cerebrospinal fluid

Question 8

Subdural space

Answer 8

Deep to dura mater

Filled with serous fluid

Question 9

Epidural space

Answer 9

Superficial to dura mater and deep to bone

Filled with fat, blood vessels and connect tissues

Question 10

White column

Answer 10

Myelinated axons and dendrites of association neurons that travel up to and down spinal cord

Question 11

Anterior white column

Answer 11

Anterior side of spinal cord tissue

Anterior to gray horns

Question 12

Lateral white columns

Answer 12

Lateral sides of myelinated matter

Question 13

Posterior white column

Answer 13

Posterior side of spinal cord

Posterior to gray horns

Question 14

Gray horns

Answer 14

Mostly un-myelinated dendrites and axons of association neurons as well

Question 15

Anterior gray horns

Answer 15

Next to anterior median fissure

Houses cell body of motor neurons

Question 16

Lateral gray horns

Answer 16

Lateral protrusions of gray matter

Question 17

Posterior gray horns

Answer 17

Posterior side of gray horns

Question 18

Gray commissure

Answer 18

Narrow strip of gray matter that joins left and right sides of cord

Question 19

Central canal

Answer 19

Tiny hole in center of gray commissure

Small amount of cerebrospinal fluid flows through it

Question 20

Ventral root

Answer 20

Collection of axons of motor neurons anchored to anterior side

Question 21

Dorsal side

Answer 21

Collection of axons of sensory neurons anchored to posterior side of cord

Question 22

Dorsal root ganglion

Answer 22

Swollen area on dorsal root

Houses cell body of sensory neurons

Question 23

Mixed spinal nerve

Answer 23

Lateral to dorsal root ganglion

Narrow mix of nerves

Control autonomic NS

Question 24

Dorsal Ramus

Answer 24

Innervates the skin and deep muscles of the back

Lateral/posterior of mixed spinal nerves

Question 25

Rami communicantes

Answer 25

Connects to the autonomic system

Branches off anterior side of ventral ramus

Question 26

Ventral Ramus

Answer 26

Carries sensation and motor impulses throughout body

Question 27

Plexus

Answer 27

Many ventral Ramus tangled together