Femoral nerve stretch test
Femoral nerve stretch test (Mackiewicz sign) - for the FNST the patient lies prone, the knee is passively flexed to the thigh and the hip is passively extended(reverse Lasegues); the test is positive if the patient experiences anterior thigh pain. This test is usually positive L2-L3, L3-L4(high lumbar), slightly positive or negative in L4–L5 disc protrusions and negative in cases with a lumbosacral protrusion.
- Christodoulides, A. N. (1989). "Ipsilateral sciatica on femoral nerve stretch test is pathognomonic of an L4/5 disc protrusion". The Journal of Bone and Joint Surgery. British volume. 71 (1): 88–89. PMID 2915013.