What type of sensation do A fibers provide?

What type of sensation do A fibers provide?

• A. Numbness
• B. Well localized discriminative sensation (sharp, stinging, pricking)
• C. Diffuse burning sensation
• D. Paresthesias

Answer: (B)

A fibers are large, myelinated nerves that conduct impulses quickly, supporting fast, well-localized sensory experiences. Within this group, A-delta fibers carry fast, sharp pain and temperature, giving a precise, discriminative sensation described as sharp, stinging, or pricking. This is why the described sensation fits A-fiber–mediated input. Numbness is a loss of sensation rather than a specific quality, diffuse burning aligns with C fibers that carry slow, dull pain, and paresthesias are abnormal sensations like tingling, not the normal sharp, localized pain conveyed by A-delta fibers.

A fibers are large, myelinated nerves that conduct impulses quickly, supporting fast, well-localized sensory experiences. Within this group, A-delta fibers carry fast, sharp pain and temperature, giving a precise, discriminative sensation described as sharp, stinging, or pricking. This is why the described sensation fits A-fiber–mediated input. Numbness is a loss of sensation rather than a specific quality, diffuse burning aligns with C fibers that carry slow, dull pain, and paresthesias are abnormal sensations like tingling, not the normal sharp, localized pain conveyed by A-delta fibers.