Review: A Delta and C-PMN Nociceptors

Question 1

Are A-Delta nociceptors myelinated?

Answer 1

YES

Question 2

Are C-PMN (polymodal) nociceptors myelinated?

Answer 2

NO

Question 3

Name the 2 stimuli for A-Delta nociceptors?

Answer 3

1. TEMP THAT CAN DAMAGE TISSUE
2. HIGH-INTENSITY MECHANICAL PRESSURE
   (that can potentially cut tissue)

Question 4

Name the 3 stimuli for C-PMN (polymodal) nociceptors?

Answer 4

1. THERMAL
2. MECHANICAL
3. ALGOGENIC CHEMICALS IN INTERSTITIAL FLUID

Question 5

Name the neuron speed of A-Delta nociceptors?

Answer 5

FAST, FIRST PAIN

35 MPH

Question 6

Name the neuron speed of C-PMN (polymodal) nociceptors?

Answer 6

CARRIES SLOWER SECOND

2.5 MPH

Question 7

Where are A-Delta nociceptors distributed?

Answer 7

SUPERFICIAL SKIN;

INFOLDING OF ALIMENTARY CANAL

Question 8

Where are C-PMN (polymodal) nociceptors distributed?

Answer 8

DEEPER PART OF SKIN
+
EVERY OTHER TISSUE (except nervous tissue)

Question 9

Receptive fields of A-Delta nociceptors are ___________; sensations are sharply delineated.

Answer 9

SMALL

Question 10

Receptive fields of C-PMN (polymodal) nociceptors are ___________; sensations are not as clearly localized.

Answer 10

LARGE

Question 11

What is the patients perceptive correlation of A-Delta nociceptors? (4)

Answer 11

SHARP 
\+
STINGING
\+
CUTTING
\+
STABBING

Question 12

What is the patients perceptive correlation of C-PMN (polymodal) nociceptors? (5)

Answer 12

DULL
\+
BURNING 
\+
ACHING 
\+
THROBBING
\+
ITCH

Question 13

Name the pain behaviour associated with A-Delta nociceptors?

Answer 13

WITHDRAWAL RESPONSE

Question 14

Name the pain behaviour associated with C-PMN (polymodal) nociceptors?

Answer 14

IMMOBILIZATION

Question 15

On which tract do A-Delta Nociceptors travel on?

Answer 15

NEOSPINOTHALAMIC

Question 16

On which tract do C-PMN (polymodal) nociceptors travel on?

Answer 16

PALEOSPINOTHALAMIC