Gentle Back Stroking Lowers Heart Rate in Mice and Infants via Dedicated Sensory Neurons

Researchers have identified a biological mechanism that explains why gentle stroking of the back calms both human infants and mouse pups. A study published on July 6, 2026, details how specific sensory neurons in the skin transmit signals to the brain to reduce heart rate and physical activity, providing a physiological basis for a common soothing practice.

The study tracks how tactile stimulation activates a specific pathway that links the skin to the central nervous system. When researchers stroked the backs of mouse pups at a velocity similar to human caressing, the animals exhibited a measurable decrease in heart rate and movement. The findings indicate that this response relies on a dedicated set of sensory neurons that respond specifically to light, rhythmic touch. By isolating these neural pathways, the researchers demonstrated that the calming effect occurs independently of social bonding or emotional context, suggesting that the behavior functions as a hardwired physiological reflex across mammalian species.

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Date: July 6, 2026

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GOAI