fibres Flashcards
1
Q
AB fibres
A
ighly myelinated and of large diameter, therefore allowing rapid signal conduction. They have a low activation threshold and usually respond to light touch and transmit non- noxious stimuli.
2
Q
A delta fibres
A
Aδ fibres are lightly myelinated and smaller diameter, and hence conduct more slowly than Aβ fibres. They respond to mechanical and thermal stimuli. They carry rapid, sharp pain and are responsible for the initial reflex response to acute pain.
3
Q
C fibres
A
fibres are unmyelinated and are also the smallest type of primary afferent fibre. Hence they demonstrate the slowest conduction. C fibres are polymodal, responding to chemical, mechanical and thermal stimuli. C fibre activation leads to slow, burning pain.
