Some people collect stamps.
As a pathologist, Poole sees navicular bones after the fact. He has been able to separate one tiny part of the horse's foot into a world of its own, and has come up with marvelous facts, figures, and even a personality for his navicular bones. But its arms are attached by ligament to P1. Dr. Poole's primary findings on navicular disease and navicular bone function have been summarized here before. Briefly, he feels that radiographic changes to the synovial fossae of the bone, often called lollipops, cones, etc. are not key to a relevant diagnosis of navicular disease.