Kevin Kirby, DPM, demonstrates the use of the subtalar joint axis locator, which he designed with Simon Spooner, PhD, in 2005. Dr. Kirby notes the subtalar joint axis locator may be beneficial in accurately assessing the spatial location of the subtalar joint axis during both weightbearing and non-weightbearing function of the foot. Dr. Kirby says future experimental work may further illustrate the important biomechanical significance of the spatial location of the subtalar joint axis upon the kinetics of the foot and lower extremity during weightbearing activities, and how abnormalities in subtalar joint axis location can create abnormal biomechanics that lead to various pathologies within the foot and lower extremity.
Dr. Kirby is an Adjunct Associate Professor in the Department of Biomechanics at the California School of Podiatric Medicine at Samuel Merritt University. He is the Director of Clinical Biomechanics at Precision Intricast, Inc., and is in private practice in Sacramento, Ca.