Pain pathways

Question 1

The difference between nociception and pain?

Answer 1

nociception = neural process 
pain = + psychological component

Question 2

describe convergence

Answer 2

a single sensory neurone in the cns can receive inputs from multiple receptors

Question 3

descrive the different types of pain fibres

Answer 3

Aa FASTEST largest proprioception
Ab medium fast mechanical . 2nd biggest
Ag 3rd biggest. medium fast . pain and temp. sharp pain
C slowest unmyelinated . pain and temp. dull pain

Question 4

how the ascending paths of touch and pain differ

Answer 4

touch (tactile) travels up same side until the medulla where it crosses over
pain crosses over immediately and ascends

Question 5

which lobe is the primary somatosensory area in

Answer 5

parietal

Question 6

what does the tactile path ascent in the brainstem as

Answer 6

medial lemniscus

Question 7

describe:
sensory discriminative
emotional affective

Answer 7

SD- tells you if youve been hurt and where

EA - association of unpleasent emotions with nociceptive stimuli

Question 8

What NT anatagonists are Ab fibres and C fibres sensitive to

Answer 8

Ab - glutamate NMDA

C - Glutamate and substance p NMDA + AMPA

Question 9

what type of pain is C

Answer 9

slow burning - chemical and thermal

Question 10

what do Ab fibres sense and where are they found

Answer 10

3+ 4 dorsal horn

Question 11

describe placticity of pain

Answer 11

same stimulus lots of times gets more and more sensitive until = pain. ‘wind up’

Question 12

Name some other effects of pain on the body and how they occur

Answer 12

orientation, respitation increases in changes in BP. branches of the SR tract . activated by brainstem