Discuss pain, pain receptors, and the pathways which conduct pain messages Flashcards Preview

HAP2 - Neurophysiology (Part 1) > Discuss pain, pain receptors, and the pathways which conduct pain messages > Flashcards

Flashcards in Discuss pain, pain receptors, and the pathways which conduct pain messages Deck (9)
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1

Pain receptors are called

Nociceptors

2

Somatic nociceptors

Detect chemical, heat, or mechanical damage to the skin, skeletal muscles or joint

3

Visceral nociceptors

Detect internal body damage with visceral organs

4

Neuropathic nociceptors

Detect nerve injury pain; phantom pain

5

A fibres

Transmit sharp localised pain to the CNS along A-δ

6

C fibres

They have slow-transmission rate and transmit dull, diffuse, aching pain

7

Anterolateral/Spinothalamic pathway location

Within the anterior and lateral white funiculi of the spinal cord

8

Anterolateral/Spinothalamic tracts

Lateral spinothalamic - pain and temp
Anterior spinothalamic - touch or pressure

9

Nociceptive pain process (4)

1. A and C fibres are activated and release glutamate and substance P.
2. Glutamate and substance P activate second order neurons
3. Axons from second order neurons ascend to the brain via spinothalamic pathway
4. The 3rd order neuron runs from the thalamus towards the primary somatosensory area