Somatosensory evoked potentials to posterior tibial nerve stimulation in children |
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Authors: | Y Zhu M Georgesco J Cadilhac |
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Institution: | 1. Department of Orthopedic, The First Affiliated Hospital of Nanchang University, Nanchang, China;2. Department of Spine Surgery, Orthopedic Research Institute, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China;3. Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China;1. Department of Neurology, Teikyo University School of Medicine, Kaga 2-11-1, Itabashi-ku, Tokyo, Japan;2. Department of Neurology, Kyorin University School of Medicine, Shinkawa 6-20-2, Mitaka, Tokyo, Japan;3. Spinal Disorders Center, Fujieda Heisei Memorial Hospital, Minakami 123-1, Fujieda, Shizuoka, Japan |
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Abstract: | The somatosensory evoked potentials (SEPs) to stimulation of the tibial nerve were studied in 88 children ranging in age from 1 day to 16 years. SEPs were not evidenced in 10 out of 44 infants less than 1 year old. In others it was a major positive wave (P) with a variable topographic distribution on the midline. The onset and peak latencies of this P were highly variable in different subjects of the same age or body-size, and in the same subject with the active electrode placed in different locations. The lowest values for latency were in subjects about 3 years old. The ascending time of P was the only parameter strictly correlated with age. The results are compared with SEPs to upper limb stimulation, which are constant and more reliable. These results indicate: that the maturation of the peripheral somatosensory pathway proceeds at a faster rate than that of the central somatosensory pathway; that the maturation of the somatosensory pathway of the upper limb precedes that of the lower limb; and that the ascending time of P is a good index of thalamo-cortical maturation. The clinical utility of these SEPs in pediatrics is discussed. |
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