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The triple stimulation technique (TST) was rarely used in multiple sclerosis (MS). This study aimed to compare TST and motor evoked potentials (MEP) for the quantification of motor dysfunction. Central motor conduction based on MEP (four limbs) and TST (upper limbs) was assessed in 28 MS patients with a median Expanded Disability Status Scale (EDSS) of 4. EDSS, timed 25-foot walk (T25FW), grasping...
Objectives: To calculate conduction velocities (CV) of single motor axons innervating hand, forearm and leg muscles, weak anodal electrical transcranial stimuli were used and single motor unit potentials were recorded in 17 normal subjects.Methods: The central motor conduction time and neuromuscular transmission delay were subtracted from the latency of unit response to cortical stimulation and single...
While trying to activate single thenar motor units by median nerve percutaneous stimulation (0.05 ms duration and near threshold intensity) at the wrist, F-waves may be recorded after the M-response. We have studied some properties of these surface-recorded unitary F-waves in 23 control subjects (age range from 21 to 91 y.o.): incidence, persistence, central latency, chronodispersion and latency fluctuation...
AMPS is a new procedure which consists in collecting only two or three surface-recorded motor unit action potentials (S-MUAPs), in response to incremental stimulations, at distinct points along the course of a nerve. To avoid alternation and be sure that any increment of the motor response corresponds to the activation of one single motor unit, S-MUAPs have to be evoked in an all-or-nothing, orderly...
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