What type of pain do C fibers transmit?

What type of pain do C fibers transmit?

• A. First pain (fast pain)
• B. Second pain (slow pain)
• C. Neuropathic pain
• D. Aching pain

Answer: (B)

C fibers carry the second pain, the slow, dull, burning sensation that follows the initial sharp hurt. These fibers are unmyelinated and conduct signal slowly, so the pain starts a moment after the stimulus and lasts longer, and is often poorly localized. The quick, sharp first pain is transmitted by myelinated A-delta fibers, which explains the two-phase pain experience after a noxious input. Neuropathic pain is a broader pathophysiologic category and not defined by this fiber type, and though aching pain describes the quality of second pain, the specific fiber-mediated type here is the second (slow) pain carried by C fibers.

C fibers carry the second pain, the slow, dull, burning sensation that follows the initial sharp hurt. These fibers are unmyelinated and conduct signal slowly, so the pain starts a moment after the stimulus and lasts longer, and is often poorly localized. The quick, sharp first pain is transmitted by myelinated A-delta fibers, which explains the two-phase pain experience after a noxious input. Neuropathic pain is a broader pathophysiologic category and not defined by this fiber type, and though aching pain describes the quality of second pain, the specific fiber-mediated type here is the second (slow) pain carried by C fibers.