Jull’s test is a cervical spine examination procedure that tests for deep neck flexor muscle weakness or deconditioning. This test is also used in whiplash injuries to test if the correct ratio of neck flexor and neck extensor strength is maintained after the injury.


Patient should be awake and cooperative during a Jull’s Test.

  1. Patient should be in a supine lying position for this procedure.
  2. The patient will raise her neck to flex it. She will maintain this position for 5 to 10 minutes.
  3. The examiner will observe for chin jutting or excessive shaking.

The patient flexes neck and maintains position for 5 to 10 seconds.


Positive Jull’s Test

A positive Jull’s Test is seen when there is noticeable chin jutting or excessive shaking as the patient maintains a flexed position. These signs could indicate deep neck flexor muscle weakness or deconditioning.

Clinical Notes

The Jull’s test may be performed in two positions. The first one is shown here while the other position involves the head about 3 cm off the table and in near full flexion.