KEMPS TEST OR EXTENSION QUADRANT TEST FOR INTERFORAMINAL LUMBAR STENOSIS Next to the cluster of Cook and the 2-stage treadmill test that we saw yesterday, the Kemps or Extension Quadrant Test can be used in case you suspect INTERFORAMINAL lumbar stenosis. The biomechanical reasoning behind it is that you are narrowing the intervertebral foramen on the effected side, by having you patient perform extension, ipsilateral lateral flexion and ipsilateral rotation. You can compare this to the Spurling