Nerve stretch tests in patients with lumbar discherniation

A herniated disc occurs when an intervertebral disc displaces and compresses a spinal nerve root. Nerve stretch tests or provocative tests have a great diagnostic value and are quite specific for the pathology of lumbar disc herniation. The nerve stretching tests that are most often used to prove or rule out compression on the spinal nerve are the following: Lazarević's test, Cram's, Bragard's, crossed-contralateral Lazarević's test, inverted Lazarević's or Fajerstein's test, Bekhterev's, Neri's, Govers' and Kernig's tests, Lhermite's sign, Dendy's test, Milgram's and Nafciger's test, bowstring sign, Trandelenburg sign, Hoover's simulation test, Menel's test, Genslen's test and Patric-faber's test. This article describes the techniques of performing all the mentioned tests, as well as their clinical significance.