Question

Which type of nerve fibers is primarily responsible for transmitting referred pain?

• A. A-delta fibers
• B. A-gamma fibers
• C. A-beta fibers
• D. C fibers

Hint:

Sharp, localized pain = A-delta fibers.
Dull, diffuse, referred pain = C fibers.

Answer 1

The Correct Option is D

Step 1: Understanding Referred Pain.
Referred pain is pain perceived at a site distant from the actual source of the stimulus.
It is typically dull, diffuse, and poorly localized.
Step 2: Characteristics of C Fibers.
C fibers are unmyelinated, slow-conducting nerve fibers.
They transmit dull, aching, and poorly localized pain.
Because of their slow conduction and central convergence, they are responsible for referred pain.
Step 3: Elimination of Other Options.
A-delta fibers are myelinated and transmit sharp, well-localized pain.
A-beta fibers are mainly involved in touch and pressure sensation.
A-gamma fibers are motor fibers supplying muscle spindles.
Thus, none of these are primarily responsible for referred pain.
Step 4: Conclusion.
Therefore, referred pain is primarily transmitted by C fibers.