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Establishment of normal values for tibial somatosensory evoked potentials

机译：建立胫骨躯体感觉诱发潜力的正常值

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Normal values for tibial somatosensory evoked potentials (SEPs) have been reported by several authors, although subject factors, such as height, age or gender, have not been fully considered. We aimed to establish standard values fully considering subject factors using multivariate analysis for tibial SEPs, including the PI5 component which we reported previously as a new stable component generated at the greater sciatic foramen. We examined SEPs following left tibial nerve stimulation in 65 normal subjects of various ages, and performed multiple regression analysis using height, age (age 20)2 and gender as predictor variables. We objectively selected the latency or interval parameters with less intersubject variability as the standard parameters. As a result, P15 was clearly identified in all of the subjects and is promising as a new parameter to evaluate the proximal segment of the tibial nerve. Among three cortical bipolar derivations investigated, the Cz' -Cc lead gave the most constant and stable P38 component. The latencies of the N8o (N8 onset), P15 (P15 peak), N21, N30 and P38o/P38 in the Cz'-Cc lead, as well as the intervals between them were selected as standard parameters. We established nomograms to find the normal limit values of each parameter.
机译：若干作者报告了胫骨躯体感应诱发潜力（SEP）的正常价值，尽管尚未得到充分考虑高度，年龄或性别等主体因素，如高度，年龄或性别。我们旨在充分考虑使用多元分析对胫骨SEP的多变量分析的主体因素来建立标准值，包括我们以前作为在较大坐骨孔中产生的新稳定组分报告的PI5组分。在65个正常对象的胫骨神经刺激后，我们检查了左侧胫骨神经刺激后的SEP，并且使用高度，年龄（20）2和性别作为预测变量进行多元回归分析。我们客观地选择了延迟或间隔参数，与标准参数较少。结果，在所有受试者中清楚地鉴定了P15，并且具有评估胫骨神经的近端段的新参数。在研究的三种皮质双极衍生中，CZ'-CC铅得到最常数和稳定的P38组分。在CZ'-CC铅中的N8O（N8开始），P15（P15峰值），N21，N21，N38和P38O / P38的延迟，以及它们之间的间隔被选择为标准参数。我们建立了NOMAROMS来找到每个参数的正常限制值。

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