Who worked closely with Dr. Fitzgerald and expanded Zone Theory by adding horizontal zones?

• A. Dr. Shelby Riley
• B. Dwight Byers
• C. Eunice Ingham
• D. Dr. William Fitzgerald

Answer: (A)

Expanding Zone Theory with horizontal zones adds a second dimension to the original map, giving reflex therapists a two-dimensional grid to work with. The idea is to link reflex areas not only along the length of the body (vertical zones) but across cross-sectional levels as well, helping target regions that sit at the same horizontal level but lie in different parts of the body. Dr. Shelby Riley worked closely with Dr. Fitzgerald to introduce these horizontal bands, enriching the model and allowing for more precise correlations between foot reflexes and body regions. This broader framework helps practitioners interpret reflex responses with greater nuance, aligning targets across both axes for more balanced results. While Fitzgerald founded Zone Theory and others like Eunice Ingham expanded the field in meaningful ways, the horizontal-zone addition is attributed to the collaborative effort with Riley, shaping a more detailed and versatile reflexology map.