Goniometry: Ankle (Subtalar) Inversion

Introduction

The ankle joint's range of motion (ROM) is an important clinical parameter in assessment. Ankle (subtalar) inversion can be measured with a goniometer. The goniometer simply measures the joint angles, quantifying joint angles to assess ankle mobility

Anatomical Movement

Ankle (subtalar) inversion

Testing position

The best testing position is a bilateral stance. Alternatively, the patient lies prone with the test-side foot and ankle extending off the end of the plinth

Goniometer Placement

AXIS LOCATION	STATIONARY ARM	MOVEMENT ARM
proximal to achilles tendon insertion	midline of lower leg	midline of calcaneus

Expected Findings

Expected range of motion is 20 degrees.