Which type of fibers are responsible for transmitting aching, long, dull pain?

The correct answer is C fibers, which are primarily responsible for transmitting aching, long, dull pain sensations. C fibers are unmyelinated and have a slower conduction velocity compared to other fiber types, such as A fibers, which conduct sharp, acute pain signals more rapidly. This slower transmission is characteristic of the dull, persistent pain associated with injuries or chronic conditions.

C fibers also play a role in the transmission of other sensations, including warmth and some types of discomfort. Their role in conveying dull pain makes them crucial for the experience of ongoing pain and discomfort that can be associated with various medical conditions. Understanding the specific functional characteristics of C fibers helps in the assessment and management of pain, as treatment approaches may vary depending on the type of pain fiber involved.