What does the talar declination angle assess?

The talar declination angle is an important measurement in evaluating the biomechanics of the foot, particularly its relationship to the longitudinal arch. Specifically, this angle assesses how the orientation of the talus—one of the key bones in the ankle—relates to the ground. In a neutral foot position, it indicates the height of the longitudinal arch.

A larger talar declination angle suggests a higher arch, while a smaller angle indicates a flatter foot structure. Thus, by measuring this angle, one can infer the state of the longitudinal arch, which plays a crucial role in shock absorption and overall foot function during activities such as walking and running. Understanding the talar declination angle can assist healthcare providers in diagnosing and managing various foot conditions related to arch height, which is integral in custom orthotic design, treatment plans for pes planus or pes cavus, and assessing changes post-intervention.