Engineered Human Skin Model Senses Touch and Heat Electrically

Scientists have built a lab-grown piece of human skin that includes the layers of real skin and living nerve cells. The construct contains a differentiated epidermis and dermis together with sensory neurons and Schwann cells that form structures similar to free nerve endings. These endings are the spots where the electrical signals start.

The tissue is placed on a high‑density microelectrode array that can pick up tiny voltage changes. When a tiny probe presses on the surface, the neurons fire in a pattern that matches the force. When a small heater warms a spot, a different firing pattern appears. The shape and timing of the waves tell the system whether the stimulus was mechanical or thermal.

This is the first time an engineered human skin model has shown clear electrical responses to both touch and heat. Researchers can now study how peripheral sensory circuits turn physical events into nerve signals in a controlled setting.

The platform could help design bio‑inspired touch sensors, improve neural prosthetics, and support future therapies that restore feeling to damaged skin.