In a reflex arc, sensory information is processed at the level of the spinal cord, resulting in action without involvement of the brain. For example, if one's fingers are burned by a candle, the hand that receives the painful stimulus is rapidly removed from the flame with a jerking motion. At the same time, the brain is receiving information indicating that a painful event occurred in the hand. It is important to understand that although the brain may perceive the painful stimulus, the reflex arc acts to retract the hand without direct input from the brain.