Regional, Summer 2014, Exam 1

Front 1

Cell bodies of ______ neurons are located in the dorsal root ganglia

Back 1

First order

Front 2

Each neuron has one axon that bifurcates, sending one to the _____ and the other to the ______

Back 2

Peripheral tissues; dorsal horn of the S.C.

Front 3

Once in the dorsal root, first order neurons may synapse with:

Back 3

Second order neurons, interneurons, sympathetic neurons, ventral horn neurons

Front 4

______ neurons are motor neurons that function in reflex responses

Back 4

Ventral horn

Front 5

First order neuron exceptions: some _____ fibers may enter the S.C. via the ventral root

Back 5

C

Front 6

First order pain fibers originating in the head synapse with second order neurons in the:

Back 6

Brainstem

Front 7

First order neurons: large, myelinated fibers travel:

Back 7

Medially

Front 8

First order neurons: small, unmyelinated fibers travel:

Back 8

Laterally

Front 9

First order neurons: some pain fibers may ascend or descend ________ before synapsing with a second order neuron via the Tracts of Lissauer

Back 9

1-3 levels

Front 10

Cell bodies for second order neurons are located in the gray matter of the dorsal horn known as the :

Back 10

Rexed lamina

Front 11

Principle site for pain modulation in the dorsal horn

Back 11

Rexed lamina

Front 12

Two types of 2nd order neurons

Back 12

Nociceptive specific, or WDR

Front 13

2nd order neurons that are nociceptive are in what Rexed lamina?

Back 13

I and II

Front 14

2nd order neurons that are WDR can also receive

Back 14

Non-noxious stimuli

Front 15

Most prevalent cell type in the Rexed lamina V

Back 15

WDR

Front 16

Type of fibers that can be recruited to send pain signals in the Rexed lamina V

Back 16

A-beta

Front 17

Type of fiber in Rexed lamina I

Back 17

C - nociceptor

Front 18

Fibers in Rexed lamina V that are more related to proprioception

Back 18

A-beta

Front 19

Type of fiber in Rexed lamina II

Back 19

A-delta and C.

Front 20

Rexed lamina that is where the opioid receptors are as well as the substantia gelatinosa

Back 20

II

Front 21

Type of fiber in Rexed lamina VII

Back 21

B

Front 22

B fibers are responsible for

Back 22

SVR

Front 23

Rexed lamina _______ is preganglionic sympathetic neurons

Back 23

VII

Front 24

Rexed lamina VIII are ________ neurons

Back 24

Ventral motor

Front 25

Visceral afferents terminate primarily in lamina ____

Back 25

I and V

Front 26

Visceral cell bodies are

Back 26

Within the dorsal horn

Front 27

You get referred pain from viscera d/t the fact that peripheral afferent nerves also enter at Rexed lamina ____

Back 27

I and V

Front 28

Considered the major pain pathway

Back 28

Spinothalamic tract

Front 29

Spinothalamic tract is located in the

Back 29

Anterolateral white matter

Front 30

Also called the paleospinothalamic tract

Back 30

Medial spinothalamic tract