Julls Test assesses whether the correct ratio of neck flexor/ neck extensor strength is maintained after a whiplash injury. Normally this ratio should be:
Neck flexor / Neck extensor strength = 1.7 / 1.0
However, after a whiplash, this ratio drops to 1 /1. (Citation needed), as the deep neck flexors become weak.
Carefully observe the patient.
The test is done in the neutral position. Repeat with the head 3 cm off the table, and in near full flexion.
Carefully observe the patient to see if s/he
Julls Test concludes there is Deep Neck Flexor muscle weakness.
Fix the eyes on a point on the wall directly in front of the eyes, and move the head forwards and backwards, slowly and rhythmically, careful to keep the chin on the same plane. Avoid flexion / extension - looking up and down. A slight chin tuck on extension is important.
NOT TO BE DONE IN PUBLIC!
The head should not move at all in this exercise. Place the hands alternatively:
Deep neck flexor weakness as illustrated by Julls Test is often associated with a thoracic kyphosis and compensatory cervical hyperlordosis. The scalenes become over-active to compensate for deep cervical flexor weakness.
This is a complex postural syndrome, beyond the reference of this page.
Relief may be obtained from this back stretch posture. Avoid extension of the neck as this may cause dizziness, either from a Vertebral artery syndrome or Benign Positional Postural Vertigo. Before using weights, if Julls test is positive, it would be advisable simply to support the head with the hands.
Those spending long hours typing at the computer should take a regular break in Brugger's relief posture. Done with deep breathing.