The recognition of reflexology as a specific type of treatment began with Zone Theory, in which the body is divided into 10 vertical zones. Each zone corresponds to fingers and toes all the way up to the top of the head. For example, if you are standing up with your hands on your thighs (palms facing down) the thumbs and great toe would be zone 1. On either side of the body, the index finger and second toe would be zone 2, etc. In reflexology theory, every organ, valve, muscle, etc. that lies within a zone can be accessed via a point or area on the feet or hands. For example, working between toes 2 and 3, or fingers 2 and 3, the eye point is found. These pathways between pressure points and other parts of the body are thought to be connected via the nervous system, as described above.