Rexed Laminae Quiz

Question 1

It forms a thin cap over the dorsal horn

Answer 1

Lamina I

Question 2

Approximate position of an important pain reception center called the Substantia Gelatinosa

Answer 2

Lamina II

Question 3

Lamina II is an important ____ ____ region

Answer 3

pain receptor

Question 4

Much of this area is filled with a group of cell bodies called the Nucleus Proprius

Answer 4

Lamina III, IV

Question 5

Sensory modality synapse (touch, pressure, tickle)

Answer 5

Lamina III, IV

Question 6

Which lamina has on the lateral edge of it cell bodies known as the reticular formation? & where is this region found?

Answer 6

Lamina V, cervical region only

Question 7

This Lamina is missing at some cord levels?

Answer 7

Lamina VI

Question 8

This lamina is the most anterior aspect of dorsal horn

Answer 8

Lamina VI

Question 9

Lamina VII is in the ____ ____ ____

Answer 9

intermediate gray area. (Lateral horn)

Question 10

Many descending tract fibers synapse with neurons in this lamina?

Answer 10

Lamina VII

Question 11

The nucleus dorsalis is also known as what?

Answer 11

Clarke’s Nucleus or Column

Question 12

Clarkes Nucleus extends like a column from cord level ___ down thru ___.

Answer 12

C8, L3

Question 13

The nucleus dorsalis contributes most axons to a famous ascending faciculus called the what?

Answer 13

Posterior Spinocerebellar tract

Question 14

This column-like nucleus forms the bulk of the lateral horn cell bodies throm T1 thru T12

Answer 14

Intermediolateral nucleus

Question 15

The intermediolateral nucleus appears, but without a distinct horn at cord levels ____ and _____

Answer 15

L1,2 & S2,3,4

Question 16

Intermediolateral nucleus are the autonomic motor neurons known as ____ and ____

Answer 16

preganglionic sympathetic neurons (T1-L2) and preganglionic parasympathetics neurons (S2,3,4)

Question 17

The intermediolateral nucleus at S2,3,4 is often called the what?

Answer 17

Sacral Parasympathetic Nucleus

Question 18

This lamina is found on medial aspect of anterior horn

Answer 18

Lamina VIII

Question 19

Most of the body’s skeletal muscles are motor intervated from neurons in this lamina

Answer 19

lamina IX

Question 20

This lamina is the reason the ventral horn is called the “somatic motor horn”

Answer 20

lamina IX

Question 21

Class A alpha motor neurons are abundant here

Answer 21

Lamina IX

Question 22

This is the largest, fastest, conducting motor neurons

Answer 22

lamina IX

Question 23

This lamina surronds the central canal

Answer 23

Lamina X

Question 24

Lamina X contains the ____ and _____

Answer 24

anterior and posterior “gray commissures”

Question 25

This lamina forms the bridge, connecting gray mater together

Answer 25

Lamina X