KEMPS TEST OR EXTENSION QUADRANT TEST FOR LUMBAR STENOSIS Next to the cluster of Cook that we saw yesteray, the Kemps or Extension Quadrant Test can be used to test out your hypothesis of lumbar spinal stenosis or to provoke the facet joints. 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. At the same time your are compressing the facet j