What free nerve ending surrounds each hair follicle?

The free nerve endings that surround each hair follicle are known as "hair follicle receptors" or "hair plexus." These receptors are sensitive to hair movement and play a crucial role in the sense of touch, allowing us to detect even slight disturbances in our environment. When the hair is displaced, the nerve endings are activated, sending signals to the brain that contribute to our perception of tactile sensations.