What are the nerve fiber types and their corresponding functions?

Correct answer: B. A-delta = sharp/fast pain; C = burning/slow pain; A-beta = touch/pressure/vibration

• A. C fibers mediate slow pain — not sharp fast pain.
• B. Correct. Nerve fiber classification by function: A-BETA fibers = touch, pressure, vibration (fast conducting, myelinated); A-DELTA fibers = sharp, pricking, FAST pain and cold (lightly myelinated); C fibers = burning, aching, SLOW pain, heat (unmyelinated, slowest). In dentistry: A-delta mediates sharp initial pain from cold; C fibers mediate dull aching pulpitis pain.
• C. The functions assigned in this option are incorrect.
• D. None of these assignments are correct.