Magnetic stimulation to the lumbosacral region and its application in diagnosis of lumbar disc herniation

摘要

In this paper, motor root conduction time (MRCT) was determined by the magnetic stimulation in lumbosacral region with F wave elicited by the same method in popliteal fossa. Motor nerve conduction time (MNCT) and MRCT were determined on tibialis and soleus. With MRCT the exciting point after magnetic simulation over lumbosacral vertebral column could be found. Together with the lengths of L-5 and S-1 root determined in 5 autopsies the exciting site is located in the interver- tebral foramen before the exit of the root. MNCT and MRCT were determined in 40 patients with lumbar disc herniation by the method with control. The results showed that no difference was seen in MNCT in all patients. It is concluded that magnetic stimulation of MEPs is an useful technique for Non-invasive diagnosis of lumbar disc herniation.