The Spinal Cord

Question 1

What are two functions of the spinal cord?

Answer 1

reflexes and a pathway for sensory/motor impulses.

Question 2

From what is the spinal cord derived?

Answer 2

ectoderm

Question 3

What is another name for the alal plate?

Answer 3

dorsal plate/horn

Question 4

What is another name for the basal plate?

Answer 4

ventral plate/horn

Question 5

What neurons are associated with the alal plate?

Answer 5

sensory neurons

Question 6

What neurons are associated with the basal plate?

Answer 6

motor neurons

Question 7

Which neurons are affectors (and central processes)?

Answer 7

sensory neurons

Question 8

Which neurons are effectors (and peripheral processes?)

Answer 8

motor neurons

Question 9

What are interneurons?

Answer 9

neurons that form a communication pathway between the motor and sensory neurons.

Question 10

What is the lateral horn associated with?

Answer 10

autonomic/parasympathetic/visceral motor

Question 11

What is the somatic nervous system?

Answer 11

nervous system associated with the voluntary movement of muscles.

Question 12

What nerves are associated with the somatic nervous system?

Answer 12

peripheral nerves (basal plate/horn)

Question 13

What is viscera?

Answer 13

Refers to a group of organs

Question 14

What are the visceral nerves?

Answer 14

Nerves that innervate organs. Includes fibers of the autonomic nervous system, afferent and efferent nerves and sympathetic nerves

Question 15

What is the autonomic nervous system?

Answer 15

Nerves that are involved in the involuntary movement of organs.

Question 16

What are the intercostal nerves?

Answer 16

Nerves inbetween the costals (ribs). They are in the thoracic region of the spinal cord.

Question 17

What does the cervical plexus innervate?

Answer 17

neck, then spreads to body.

Question 18

What does the brachial plexus innervate?

Answer 18

shoulders, upper limbs and back muscles.

Question 19

What does the lumbosacral enlargement innervate?

Answer 19

pelvis and lower limb.

Question 20

What is the outermost covering of the spinal cord?

Answer 20

epidural space

Question 21

What is below the epidural space?

Answer 21

dura mater

Question 22

What is below the dura mater?

Answer 22

subdural space

Question 23

Between what layers is the CSF?

Answer 23

in the subarachnoid space between the arachnoid mater and pia mater.

Question 24

What is below the subdural space?

Answer 24

arachnoid mater

Question 25

What is below the arachnoid mater?

Answer 25

arachnoid space

Question 26

What is below the arachnoid space?

Answer 26

pia mater

Question 27

What anchors the spinal cord in place in the dural sac?

Answer 27

denticulae ligaments

Question 28

What are the invertebral formanen?

Answer 28

regions where the spinal nerves exit.

Question 29

What do the spinal ganglion converge into?

Answer 29

The spinal nerve/ventral rami

Question 30

What do the ventral rami make?

Answer 30

spinal nerve plexuses and intercostal nerves.

Question 31

What kinds of nerves to the rami carry?

Answer 31

motor and sensory.

Question 32

What is the conus medularis?

Answer 32

The end of the spinal column before it brances into the the cauda equina.

Question 33

What is the cauda equina?

Answer 33

region of poserior and anterior spinal roots.

Question 34

Where does the conus medullaris end?

Answer 34

between L1 and L2

Question 35

What is the filium terminalus?

Answer 35

Part of pia mater that anchors top of spinal cord into sacrum; it is made of the pia mater and is an extension of the pia mater that goes sacrally.

Question 36

What vertebrae are lumbar punctures done?

Answer 36

below L2 (around L3 and L4)

Question 37

Which lesion to the spinal cord is the most severe?

Answer 37

cervical lesions