Biomechanical Intelligence Quotient
How Great Doctors Measure Their Patients and Get Extraordinary Results

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Subtalar Joint Excursion

What it Measures

Available range of motion of the calcaneus relative to lower leg

Significance

  • Moderate significance
  • Significance increases when midtarsal joints are abnormal

Normal Value

  • Eversion 10-25°
  • Inversion 20-35°

Exam containing this measurement:

BIQ 24

BIQ 10

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About

Subtalar Joint Eversion and Inversion Excursions reveals how much the ankle can bend sideways in both directions. The Subtalar Joint in the ankle in responsible for allowing that kind of horizontal bending. This measurement is important for two reasons as well. First, movement and rotation at the subtalar joint is essential to the process of walking. During walking, the foot has to make slight bends outward and inward when landing and being brought up into the air to make efficient use of the forces running through the foot caused by the legs as a whole and from the ground. Second, having too much available movement implies that the muscles and tendons stabilizing the ankle are not functioning properly. This means straining, tearing and “rolling” of the ankle is more likely to occur frequently.

Effect of Deviation

Limited eversion and inversion increase articulation responsibility to midtarsal joints and mid and forefoot bone geometry to stabilize the body against the ground

Biomechanical Intelligence Quotient
How Great Doctors Measure Their Patients and Get Extraordinary Results

Download
BIQ forms:

Subtalar Joint Excursion

What it Measures

Available range of motion of the calcaneus relative to lower leg

Significance

  • Moderate significance
  • Significance increases when midtarsal joints are abnormal

Normal Value

  • Eversion 10-25°
  • Inversion 20-35°

Exam containing this measurement:

BIQ 24

BIQ 10

Hide/show animation

About

Subtalar Joint Eversion and Inversion Excursions reveals how much the ankle can bend sideways in both directions. The Subtalar Joint in the ankle in responsible for allowing that kind of horizontal bending. This measurement is important for two reasons as well. First, movement and rotation at the subtalar joint is essential to the process of walking. During walking, the foot has to make slight bends outward and inward when landing and being brought up into the air to make efficient use of the forces running through the foot caused by the legs as a whole and from the ground. Second, having too much available movement implies that the muscles and tendons stabilizing the ankle are not functioning properly. This means straining, tearing and “rolling” of the ankle is more likely to occur frequently.

Effect of Deviation

Limited eversion and inversion increase articulation responsibility to midtarsal joints and mid and forefoot bone geometry to stabilize the body against the ground

Biomechanical Intelligence Quotient
How Great Doctors Measure Their Patients and Get Extraordinary Results

Download
BIQ forms:

Subtalar Joint Excursion

What it Measures

Available range of motion of the calcaneus relative to lower leg

Significance

  • Moderate significance
  • Significance increases when midtarsal joints are abnormal

Normal Value

  • Eversion 10-25°
  • Inversion 20-35°

Hide/show illustrations

Exam containing this measurement:

BIQ 24

BIQ 10

About

Subtalar Joint Eversion and Inversion Excursions reveals how much the ankle can bend sideways in both directions. The Subtalar Joint in the ankle in responsible for allowing that kind of horizontal bending. This measurement is important for two reasons as well. First, movement and rotation at the subtalar joint is essential to the process of walking. During walking, the foot has to make slight bends outward and inward when landing and being brought up into the air to make efficient use of the forces running through the foot caused by the legs as a whole and from the ground. Second, having too much available movement implies that the muscles and tendons stabilizing the ankle are not functioning properly. This means straining, tearing and “rolling” of the ankle is more likely to occur frequently.

 

Effect of Deviation

Limited eversion and inversion increase articulation responsibility to midtarsal joints and mid and forefoot bone geometry to stabilize the body against the ground