J is for Jacks Test

September 22, 2022

Jacks test is a test done weightbearing to assess the static function of the windlass mechanism. It is also called the Hubscher maneuver.

The Jacks Test, also known as the Hubscher maneuver or the Windlass test, is a clinical examination technique used to assess the integrity and function of the plantar fascia, a thick band of tissue that supports the arch of the foot.

To perform the Jacks Test, the following steps are typically followed:

  1. The patient is asked to lie down on their back, with their legs extended.
  2. The examiner then stabilizes the patient’s leg and grasps the toes of the foot being tested.
  3. With the examiner’s other hand, the foot is dorsiflexed (pulled upwards) at the ankle joint.
  4. While maintaining this dorsiflexion, the examiner observes for any changes or symptoms in the plantar fascia and the patient’s response.

The Jacks Test primarily assesses the tension and function of the plantar fascia. When the foot is dorsiflexed, tension is applied to the plantar fascia, and if it is intact and healthy, it should cause a tightening and lifting of the arch of the foot. This lifting of the arch is known as the Windlass mechanism. If there is pain or limited range of motion


Comments are closed.