Both active straight leg raise and passive straight leg raise tests are designed to tension the sciatic nerve to assess a space-occupying lesion.
Piriformis Stretch Orthopedic Assessment Test for Piriformis Syndrome
The piriformis stretch test is used to assess piriformis syndrome, that is, compression of the sciatic nerve by the piriformis.
Cough Test and Valsalva Maneuver Orthopedic Assessment Tests
Cough test and Valsalva maneuver are designed to increase intrathecal pressure, or pressure on the spinal nerves in the intervertebral foraminal spaces.
