The word biofeedback is an indication for biological control mechanisms. It is composed by the Greek word bio = life, life processes and by the English word feedback = reaction.
Reflex zones or somatotypes (derived from the Greek words soma = body and topos = place, location, area) are areas on the skin surface, which have connections to the internal organs and body structures.
For over a thousand years Western and Eastern cultures have applied the knowledge of reflex zones in diagnosis and therapy.
Indian and Chinese holistic healing sciences assume that the hand reflex zones are not only connected to the organs but also to the consciousness, the meridians, the energetic field (aura) and the chakras of a person.