A-delta Fibers

A-delta fibers are small nerve fibers responsible for transmitting fast, sharp pain signals from the site of injury to the brain. When you experience a sudden, prickly sensation—like a quick headache or a skin pinprick—these fibers are actively sending that immediate pain message. They also carry temperature information, especially related to cold. A-delta fibers are part of your body's way of quickly alerting you to potential damage, enabling prompt reactions. Their fibers are myelinated, meaning they have a coating that helps the pain signals travel rapidly.