Spincal cord structure: laminae

Question 1

The dorsal horn makes up which laminae?

Answer 1

I-VI

Question 2

What is dorsal horn function?

Answer 2

all sensory

Question 3

Laminae I

Answer 3

Marginal zone

Question 4

Marginal zone

Answer 4

I: resonsible for pain and temp

Question 5

What zone is Substantia gelatinosa

Answer 5

II:

Question 6

What does zone II house?

Answer 6

Interneurons for pain/sensation on periphery

Question 7

Where do we process mechanical, visceral and noxious stimuli?

Answer 7

III-V

Question 8

This zone is prominent only at enlargements

Answer 8

VI

Question 9

Neurons from these laminae give rise to anterolateral tract

Answer 9

I, V, VII

Question 10

What laminae is the Intermediate zone?

Answer 10

VII

Question 11

What two areas are in the Intermediate zone?

Answer 11

Medial; clarks nucleus

Lateral: Intermediolateral cell column and Sacral autonomic nuclei

Question 12

What does the Intermediolateral cell column contain and for which areas of sp cd?

Answer 12

Pregang SNS

T1-L2/3

Question 13

What does the sacral autonomic nucleu contain and for which cell column?

Answer 13

Pregang PNS

S2-4

Question 14

Clark’s nucleus is for which areas of sp cd, what does it give rise to?

Answer 14

C8-L3

gives rise to dorsal spinocerebellar tract

Question 15

What laminae make up the ventral horn?

Answer 15

ventral VII, VIII and IX

Question 16

What is the motor neuronal gropu that innervates the truncal and limb muscles?

Answer 16

Laminae IX in ventral horn

Question 17

Symptoms of Dorsal rhizotomy

Answer 17

Hypesthesia or anesthesia

No sensation

Question 18

What occurs if you sever all dorsal roots?

Answer 18

If you sever all dorsal roots the extremity is virtually paralyzed

Question 19

What happens if you only sever muscles afferents of dorsal root?

Answer 19

Severed muscle afferents saw limb could still function

Question 20

What happens if you sever cutaneous afferents?

Answer 20

Severed cutaneous afferent and saw minimal motor use

Question 21

Symptoms of Ventral Root lesions

Answer 21

Weakness or flaccid paralysis and atrophy of muscles

Question 22

What happens if you involve autonomic pregans in a ventral root lesion?

Answer 22

Autonomic dysfunction

Question 23

In a spinal cord hemisection: do you lose fine touch, vibration and proprioception IPSI or CONTRA to lesion? Above or Below?

Answer 23

IPSI to and below

Question 24

In a spinal cord hemisection do you lose sense of pain and temp IPSI or CONTRA to lesion? Above or below?

Answer 24

CONTRA and Below

Question 25

This will cause destruction of ascending and/or descending tracts resulting in sensory, motor or mixed deficiets.

Answer 25

Spinal cord transection

Question 26

Where does Syringomelia occur?

Answer 26

around central canal

Question 27

syringomelia is slow or fast growing disease?

Answer 27

slow