Cauda equina sensory conduction time in normal adult humans
Küçük Resim Yok
Tarih
2019
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Ege Univ
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Objective: The clinical usefulness of the cauda equina motor conduction time (CE-MCT) is well established either by magnetic or electrical stimulation of the lumbar roots at the lumbar spine levels. However, the cauda equina sensory conduction time (CE-SCT) is not studied systematically in human adults. Methods: Lumbar laminar electrical stimulation from the level of the L1 and L5 vertebrae was applied using needle electrodes. The smallest M-responses obtained from both soleus muscles were considered as the motor threshold for the L1 and L5 motor root levels. Afterwards, with the needles in the same place, the connection cables were removed from the stimulation channel and replaced to the recording channel, then the sensory program of the electromyograph was selected. The posterior tibial nevre was excited with superficia lbipolar electrodes from the popliteal fossa, and after a very slight muscle twitch was observed the intensity was reduced slightly. Therefore, the pure sensory fibers were stimulated. Cauda equina sensory action potentials were recorded and averaged at the laminar levels of L1 and L5 in the spine. Twenty adult normal controls were studied. Results: The monopolar recordings of cauda equina sensory responses at the L1 and L5 laminar levels were measured from their first positive peaks and the CE-SCT was found as 1.9 +/- 0.4 msec (mean +/- SD) and ranged from 1.0 to 2.8 msec. Conclusion: The method of CE-SCT recording and calculation is very easy to use and applicable in all normal adult subjects. The mean CE-SCT value is similar to those found for CE-MTC.
Açıklama
31st National Clinical Neurophysiology EEG-EMS Congress -- APR09, 2015 -- Antalya, TURKEY
Anahtar Kelimeler
Cauda equina, laminar stimulation, lumbosacral roots, sensory and motor conduction
Kaynak
Neurological Sciences and Neurophysiology
WoS Q Değeri
Q4
Scopus Q Değeri
Cilt
36
Sayı
3
