Sensory-motor conduction time in amyotrophic lateral sclerosis.
19 ALS patients were submitted to motor evoked potentials (MEP) and F-wave from thenar muscles. Somatosensory evoked potentials (SEP) from median nerve were recorded as well in 16 patients. MEP were bilaterally absent in 4 patients (21%) and monolaterally absent in 6 patients (3.6%). Among patients with recordable waves, MEP and F-wave were significantly delayed. Their upper motor neuron conduction time was clearly abnormal only in one case. In SEP recordings the N9-N13 was significantly delayed, but the N13-N20 was normal. Four patients showed a combined sensory-motor dysfunction (increase of both N19-N13 interval and F-wave latency).
Facco
E
E
Istituto di Anestesiologia e Rianimazione, Università di Padova.
Micaglio
G
G
Liviero
M C
MC
Ceccato
M B
MB
Toffoletto
F
F
Martinuzzi
A
A
Angelini
C
C
D000328:Adult; D000690:Amyotrophic Lateral Sclerosis / Q000503:physiopathology*; D005073:Evoked Potentials, Somatosensory / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000503:physiopathology; D008875:Middle Aged; D009046:Motor Neurons / Q000502:physiology*; D009431:Neural Conduction