Neuro Anatomy of the Spinal Chord

Question 1

How many cord segments are there?

Answer 1

31

Question 2

The cord tapers to a cone called what?

Answer 2

Cons Medullaris

Question 3

Cord segments are house by what?

Answer 3

T9-L1

Question 4

Where are the spinal cord enlargements located?

Answer 4

C5-T1 and L1-S3/S4

Question 5

What causes the cervical enlargement of C5-T1

Answer 5

Information from the Brachial plexus runs through here

Question 6

What is the main difference between the cranial meanings and spinal meninges

Answer 6

There is and epidural space in the spinal meanings

Question 7

The dura mater is innervated by what nerve

Answer 7

Recurrent meningeal nerve

Question 8

The thecal sac extends to what vertebral body

Answer 8

S2

Question 9

What are the two derivatives of the pia mater

Answer 9

Denticulate ligaments

Fillum terminale

Question 10

T/F Synapse happen in the white matter and not in the gray matter

Answer 10

False- only axons are found in the gray matter and synapse happen in the gray matter

Question 11

Lateral horns can only be in what cord sections

Answer 11

T1-L2/L3

Question 12

The Central canal a remnant of what embryological structure?

Answer 12

Neural Tube

Question 13

The central Canal is a continuation of what structure?

Answer 13

4th ventricle

Question 14

What the four type of neurons found in the gray matter of the spinal cord?

Answer 14

Motor
Interneuron
Tract
Propriospinal

Question 15

What type of neuron has axons that leave the spinal cord?

Answer 15

Motor

Question 16

Alpha neurons innervate what kind of tissue?

Answer 16

Extra fusal muscle fibers outside of the neuron muscular spindle

Question 17

What kind of neuron stays within the cord segments and have short axons?

Answer 17

Interneuron

Question 18

What kind of neuron has axons that go into the white matter before projecting upward to the brain?

Answer 18

Tract

Question 19

What kind of Neuron is in all cord segments but does project to the brain?

Answer 19

Propriospinal

Question 20

What kind of neuron interconnects cord segments to effect posture?

Answer 20

Propriospinal

Question 21

T/F The ten layers refers to the white matter of the spinal cord?

Answer 21

False- there 10 layers refers to the gray matter

Question 22

Pseudounipolar neurons synapse at what layers/

Answer 22

I-VI

Question 23

Layer I and II are collectively called what?

Answer 23

substantia gelatinosa

Question 24

What kind of information enters the substantia gelatinosa?

Answer 24

Pain and temperature

Question 25

The substantia gelatinosa gets information what kind of receptors?

Answer 25

Nociceptors and thermoreceptors

Question 26

Layer III and IV are collectively call what?

Answer 26

Nucleus proprius

Question 27

What kind of information goes into the Nucleus Proprius?

Answer 27

Everything but pain and temperature

Question 28

What kind of information enters layer VI?

Answer 28

Propricoeptive

Question 29

What forms the complex circuitry in the lamina?

Answer 29

Interneurons

Question 30

Where is the site of convergence of trigeminal and cord afferents?

Answer 30

C1- C3 in the dorsal horn

Question 31

Pain can be referred from the neck to where?

Answer 31

The trigeminal terriitory