Spinal Cord

Question 0

What are the two branches of the nervous system?

Answer 0

Central nervous system (CNS) and peripheral nervous system (PNS)

Question 1

What is the medical term for cervical and lumbar enlargements in the spinal cord?

Answer 1

Lumbar and cervical cistern

Question 2

What is the CNS made up of?

Answer 2

Brain and spinal cord

Question 3

What is the PNS made up of?

Answer 3

Cranial nerves and spinal nerves

Question 4

How many cranial nerves are there?

Answer 4

12

Question 5

How many spinal nerves are there?

Answer 5

31

Question 6

What are the divisions of the sensory part of the nervous system?

Answer 6

Somatic and visceral sensory divisions

Question 7

What are the divisions of the motor part of the nervous system?

Answer 7

Autonomic (involuntary) and somatic (voluntary) motor divisions

Question 8

What is the segmental innervation of the brachial plexus?

Answer 8

C5-T1

Question 9

What are the three layer of the meninges?

Answer 9

Superficial to deep: Pia mater, arachnoid mater, dura mater

Question 10

What is the segmental innervation of the lumbosacral plexus?

Answer 10

L1-S5

Question 11

What are the three cells associated with the nervous system?

Answer 11

Neuroglia, schwann cells, neurons

Question 12

What is the function of schwann cells?

Answer 12

Produces myelin protein for myelinated axons

Question 13

What is the structural and functional unit of the nervous system?

Answer 13

Neuron

Question 14

Do dendrites carry impulses to or away from the neuron cell body?

Answer 14

To

Question 15

Do axons carry impulses to or away from the neuron cell body?

Answer 15

Away

Question 16

What is a synapse?

Answer 16

The point at which one neuron communicates with one or more neurons

Question 17

What is the length of the spinal cord?

Answer 17

Medulla to L1 or L2

Question 18

What is the segmental portion of the cervical enlargement?

Answer 18

C4-T1

Question 19

What is the segmental portion of the lumbosacral enlargement?

Answer 19

L1-S3

Question 20

What is the filum terminale?

Answer 20

Anchors the dural sac to the coccyx

Question 21

Where does the CSF sit?

Answer 21

Underneath the arachnoid mater in the subarachnoid space

Question 22

What is a denticulate ligament?

Answer 22

Sheet of pia mater that anchors the spinal cord to the dural sac

Question 23

What are the three layers of the connective tissue coverings?

Answer 23

Epineurium, perineurium, and endoneurium

Question 24

How many arteries are associated with the spinal cord?

Answer 24

1 anterior spinal artery and 2 posterior spinal arteries

Question 25

How many veins are associated with the spinal cord?

Answer 25

3 anterior spinal veins and 3 posterior spinal veins

Question 26

How many medullary and radicular veins drain the spinal veins?

Answer 26

12

Question 27

What is in the gray matter (nucleus)?

Answer 27

Nerve cell bodies

Question 28

What is in the white matter (tracts)?

Answer 28

Axons

Question 29

What is the visual ending of the spinal cord?

Answer 29

Dural sac

Question 30

What area of the vertebral column has the smallest amount of gray matter?

Answer 30

Thoracic

Question 31

What area of the vertebral column has the largest amount of gray mater?

Answer 31

Lumbar

Question 32

What information does the dorsal (posterior) nerve root carry?

Answer 32

Sensory

Question 33

What information does the ventral (anterior) nerve root carry?

Answer 33

Motor

Question 34

Where do the dorsal and ventral roots run?

Answer 34

Subarachnoid space covered in pia mater

Question 35

What is the only region that has cauda equina?

Answer 35

Lumbar

Question 36

Where can you see lateral horns?

Answer 36

Autonomic nervous system

Question 37

What do the afferent nerve roots carry?

Answer 37

Sensory

Question 38

What do the efferent nerve roots carry?

Answer 38

Motor

Question 39

What is the endoneurium?

Answer 39

A delicate connective tissue sheath that surrounds the neurolemma cells and axons

Question 40

What is the perineurium?

Answer 40

A layer of dense connective tissue that encloses a fascicle (bundle) of peripheral nerve fibers

Question 41

What is the epineurium?

Answer 41

A thick connective tissue sheath that surrounds and encloses a bundle of fascicles

Question 42

What is the cauda equina?

Answer 42

Bundle of spinal nerve roots running through the lumbar cistern