TST (Triple stimulation technique) helps to better quantify the proportion of motor units activated by transcranial magnetic stimulation. The abnormal amplitude registered by TST is proportional to the intensity of conduction disorders. The evaluation of these disorders is more precise with this technique than with the slowing of the central conduction time (CCT). The investigators propose to use this technique in CNS pathologies where this disorder is significant and essential, like multiple sclerosis and stroke.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
100
Evoked motor potentials obtained by magnetic transcranial stimulation are usually used, in standard practice, to evaluate the corticospinal tract. This procedure combines two techniques: the magnetic stimulation and the electroneuromyography. It is based on the double collision principle between the descending central stimulation (magnetic) and the ascending peripheric stimulation, hereby suppressing the issue of desynchronisation of evoked motor potentials. The Triple stimulation technique allows a better quantification of the proportion of motor units activated by the transcranial stimulation.
CHU Brugmann
Brussels, Belgium
Amplitude of the motor evoked potentials
Time frame: during the TST (30 min)
Surface of the motor evoked potentials
Time frame: during the TST (30 min)
Amplitude ratio of the TST
Time frame: during the TST (30 min)
Surface ratio of the TST
Time frame: during the TST (30 min)
TMS threshold
Time frame: during TST (30 min)
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