Pain Flashcards
What is normal pain known as?
Acute Nociceptive pain
What axon corresponds to sharp stabbing pain?
A DELTA
What fibres are responsible for dull aching pain?
C fibres
What type of receptor endings do nociceptors have?
Free nerve endings
What part of the spinal chord do A DELTA or C fibres go into during the spinothalamic pathway?
Outer layers of dorsal horn
What area does the second order pain projecting neurons move to in the spinal chord?
The other side of the body to the antero-lateral funiculus
What other parts of the brain does the second order neuron activate on its way to the thalamus in spinothalamic pathway?
Medulla
Pons
Midbrain
This is known as the spinal lemniscus
Where does the first order neuron synapse with the secondary neuron during Ventral trigeminothalamic pathway?
The spinal nucleus in the spinal chord which crosses the midline
What are the 2 pain pathways?
Spinothalamic (body)
Ventral trigemino-thalamic pathway (face)
How can the location of pain be misleading?
When talking about referred pain
What is referred pain?
Pain perceived on one part of the body but the pathology is elsewhere
Why can some people not recruit pain fibres?
Loss of Nav1.7 function
What are some physiological factors which can effect pain?
Sex
Age
Previous pains
Family
Culture
What are emotional factors which effect pain?
Fear
Anger
Frustration
What is does the gate control theory of pain suggest?
Inhibitory inter neurons block perception of pain as they are released when a rubbing action initiates A DELTA fibres
