Subtalar Joint Closed Chain

Pronation

• Adduction and plantarflexion of the talus associated with internal rotation of the leg
• Eversion of calcaneus
• Flexion of knee
• Anterior tilt of pelvis

 

Supination

• Abduction and drosiflexion of the talus associated with external rotation of the leg.
• Inversion of the Calcaneus
• Knee extension
• Posterior tilt of the pelvis.

 

Planal Dominance

Subtalar Joint

• High pitched subtalar joint axis - Increase in adduction- abduction
• Low pitched subtalar joint axis - increased inversion-eversion

 

Effects of leg rotation on the foot

• 4 to 6 degrees of subtalar joint pronation is required to expedite internal rotation.
• Internal rotation of the leg results in pronation of the subtalar joint
• External rotation results in supination.
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