Posterior Scalene’s Strength Test
With the client supine, they ipsi- laterally flex their neck.
The therapist tries to bring them out of this position
The client is unable to resist the therapist’s force
Posterior Scalene’s Length Test
With the client supine, they ipsi- laterally flex their neck, while holding down the contra-lateral shoulder
Limited range of motion or a stretch felt along the contralateral neck