RT Journal Article
SR Electronic
T1 Magnetic stimulation over the spinal enlargements.
JF Journal of Neurology, Neurosurgery & Psychiatry
JO J Neurol Neurosurg Psychiatry
FD BMJ Publishing Group Ltd
SP 1025
OP 1032
DO 10.1136/jnnp.52.9.1025
VO 52
IS 9
A1 Y Ugawa
A1 J C Rothwell
A1 B L Day
A1 P D Thompson
A1 C D Marsden
YR 1989
UL http://jnnp.bmj.com/content/52/9/1025.abstract
AB Magnetic stimulation over the cervical and lumbar spinal enlargements was performed in 10 normal volunteers using a 9 cm diameter coil. Although the threshold and the amplitude of responses depended on the position of the coil and the direction of current flow within it, the latency was constant. The latencies obtained by magnetic stimulation were compatible with those obtained using high voltage electrical stimulation of the spinal nerve roots and always were shorter than the peripheral motor conduction time estimated by F-wave techniques. The site of activation by magnetic stimulation appears to be very similar to that stimulated by the high-voltage electrical method. Stimulation of descending motor tracts within the cord was not possible using the magnetic stimulator.