Dr. Fitzgerald mentioned a lot of benefits with reflexology, and propounded a theory which says anything which is wrong in any part of a zone will affect the entire zone. This is seen mostly throughout the length of the body.
Later, few experiments revealed that stimulation of toes did not always serve the purpose adequately. For a more certain treatment of various organs, specific parts of foot, along the entire soles, called for stimulation. This gave rise to the concept of lateral (horizontal) zones. These are the most important concepts of reflexology zones in human body.
The main purpose of lateral zones is to fix the image of the body onto the feet. But it should be more precise about the location. On the sides of fore foot, we will find two prominent bones. On your sole, you can find a transverse line passing through the tips of these prominent bones. This line is the shoulder line. The area of the foot from toe-tips to this shoulder line comprises horizontal zone 1 and contains trigger points for the organs of the head and neck.
The sole of the fore foot contains two mountain-like structures, and are called as the ‘balls’ of the foot. These balls are of a much darker color as compared to the middle of the sole. If you draw a line passing through the lower borders of the balls, you can find the diaphragm line. Diaphragm is a dome-shaped muscle that separates chest from the abdomen. The area of the foot between the shoulder line and diaphragm line comprises horizontal zone 2 and contains trigger points for organs of the chest.
Another prominent bone would be the middle of outer border foot. If you draw another transverse line passing through this prominent bone, you will find the navel or waist line. In anatomical terminology, this line represents the L4 (the fourth lumbar vertebra). The area of the foot between the diaphragm and the navel lines comprises horizontal zone 3 and contains trigger points for most organs of abdomen. And if you observe the sole of the heel, you will find an oblong dark colored area. This is the area of the foot between the navel line and the junction of the two colors of skin. This is the junction of light colored skin of mid-sole and dark colored skin of the heel, and comprises horizontal zone 4, which contains a trigger points to the organs of lower abdomen and the pelvis.
The organs that lie near to the entire front surface of the body, can be easily reached. This goes through the trigger points on the upper surfaces (dorsum’s) of the two feet. Whereas the organs that lie nearer the entire back surface of the body can more easily be reached through the trigger points on the soles. With the help of these four horizontal reflexology zones in human body, (ten vertical zones (five on each foot)), you can determine the trigger area of any organ.