Hands reach out to touch the world, befriending and defending as well as picking up the pieces when necessary, and helping us to survive. Pressure sensors in the hands allow us to communicate with others and to manipulate our surroundings, carrying out our daily tasks, and using the tools and equipment that we routinely employ in the performance of those tasks.
At the most fundamental level, the hands, like feet, are essential to our survival, creating shelter, providing food, and nurturing our young. In times of danger, the hands participate in the fight or flight response. The sudden adrenaline surge that enables a person to lift a car following an accident is an example of this extraordinary response to stress.