Ankle Jerk

The ankle jerk reflex observed during a neurological exam by striking the ankle directly with a hammer when the patient's foot is relaxing and dorsi-flexed. It is also known as the Achilles Reflex. A positive result would be the jerking of the foot towards its plantar surface.



Simulation Type

Condition, Using interactive animation

Gender Specific

No, Common for both genders

Condition Simulated


     Slight reflex(Normal)-rated as 2+

     Super-normal (hyper-reflexic) rated as 3+

     Clonus: Repetitive shortening of the muscle after a single stimulation rated as 4+

     No evidence of contraction rated as 0 .


     The user can select the leg of the patient to be tested by using a toggle button “Show left/Show right”.

     The system will display patient's foot placed on the doctor’s hand and is relaxing.

     Hit" Strike " button to strike on patient’s ankle with a hammer.

     An animation showing patient’s foot movement.

     Note the rate of patient’s foot movement.

     Patient's response rate will will be indicated in a response box.