Sensory 3 Flashcards
1
Q
Aδ mechanical nociceptors
A
myelinated
Conduct fast pain
2
Q
Polymodal C fiber Nociceptors
A
Conduct slow pain
3
Q
Vanilloid Receptors
A
VR – 1:
responds to capsaicin & temperature > 43⁰ C
VRL – 1:
responds to temperature > 50⁰ C, but NOT to capsaicin
4
Q
Substance P
A
release histamine
5
Q
Serotonin (5-HT)
A
released from platelets and activates nociceptors
6
Q
Gate Theory
A
unmodulated pain:
C fiber
Aβ fibers:
block pain transmission
7
Q
Referred pain
A
painful sensation at a site other than the injured one
due to convergence of the information
Dermatome theory
8
Q
Convergence
A
viscerosomatic
nociceptors
9
Q
Hyperalgesia
A
increased sensitivity
10
Q
Hypoalgesia
A
decreased sensitivity
11
Q
Analgesia
A
complete loss of pain sensation
