Are C fibers myelinated or unmyelinated?

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Prepare for the Anesthesia Pharm Exam with flashcards and multiple choice questions. Each question offers hints and explanations to enhance your understanding. Get ready for your test!

Multiple Choice

Are C fibers myelinated or unmyelinated?

Explanation:
C fibers are unmyelinated. Their small diameter and lack of a myelin sheath produce slow, continuous conduction, which matches their role in signaling dull, slow pain and warm temperatures. In contrast, myelinated fibers (like the larger A fibers) conduct much faster via saltatory conduction. Some small-diameter fibers are thinly myelinated (A-delta), but that’s not the case for C fibers.

C fibers are unmyelinated. Their small diameter and lack of a myelin sheath produce slow, continuous conduction, which matches their role in signaling dull, slow pain and warm temperatures. In contrast, myelinated fibers (like the larger A fibers) conduct much faster via saltatory conduction. Some small-diameter fibers are thinly myelinated (A-delta), but that’s not the case for C fibers.

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