Successful assessment/diagnosis of sciatica depends upon successfully assessing the underlying cause of the sciatic nerve compression.
Orthopedic assessment testing works by what could be called “stress and assess”. The test adds a physical stress and we assess the client’s response.
The slump test places tension on the spinal cord and PNS. It assesses a space occupying condition of the cervical and lumbar spine, as well as TOS.
For a pathologic disc of the lumbar spine, the principle assessment test is straight leg raise (SLR). This can be performed actively or passively.