Subtalar Joint Neutral Position:
Defined as the position of the subtalar joint when it is neither pronated nor supinated.
• patient prone, posterior aspect of calcaneus in the frontal plane (elevate opposite hip to achieve this)
• palpate talus…
• observe or measure the angle between the posterior bisections of the calcaneus and lower third of the leg
Reliability – different studies have found the determination of subtalar joint neutral to vary from poor to moderate .
Sources of error:
• posterior aspect of calcaneus is not in the frontal plane
• bisections improperly drawn
• may be difficult if obese or oedema present