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首页> 外文期刊>Arquivos de Neuro-Psiquiatria >Median nerve somatosensory evoked potentials studies on latency variability as a function of subject height, limb length and nerve conduction velocity: estudos de variabilidade das latências em fun??o da altura, comprimento do membro superior e velocidade de condu??o nervosa.
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Median nerve somatosensory evoked potentials studies on latency variability as a function of subject height, limb length and nerve conduction velocity: estudos de variabilidade das latências em fun??o da altura, comprimento do membro superior e velocidade de condu??o nervosa.

机译：中枢神经体感诱发电位研究潜伏期变化与受试者身高，肢体长度和神经传导速度的关系：潜伏期变异性研究与身高，上肢长度和神经传导速度的关系。

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Report on the results of regression analysis studies concerning median nerve somatosensory evoked potentials (SEPs) latencies, as dependent variables, and subject height, limb length and nerve conduction velocity (NCV), as independent variables. The tests were performed on 23 normal volunteers. Absolute SEP latencies could be predicted by a linear regression model when the independent variable was arm length; when it was subject height, however, both exponential and polynomial models proved better, the Latter showing the best coefficients of determination, R 2. Multiple linear regression with two independent variables (arm length and NCV) was found to be better than simple linear regression for predicting P/N13 latency. The regression line for EP-P/N13 latency on height was found to be a polynomial curve; although the regression was found to be significant by the ?F? test (alpha= 1%), the model had a low R2 value (0.41). The same applies to the P/N13-N19 interpeak latency regression curve, but the regression was significant for alpha =5% in that case. Although interwave latencies are the most useful parameters for clinical interpretation of median SEPs, absolute latencies may occasionally be important, and should be corrected for body size; in unusually tall subjects, it might be useful to double-check EP-P/N13 interwave latency prolongation by estimating the maximum expected P/N13 latency, using a model that takes into account both limb length and NCV.
机译：关于正中神经体感诱发电位（SEPs）潜伏期（因变量）以及受试者身高，肢体长度和神经传导速度（NCV）作为自变量的回归分析研究结果的报告。测试是对23名正常志愿者进行的。当自变量为臂长时，可以通过线性回归模型预测绝对SEP潜伏期。当是受试者身高时，指数模型和多项式模型都被证明是更好的，后者显示出最佳的确定系数R2。发现具有两个自变量（臂长和NCV）的多元线性回归优于简单线性回归用于预测P / N13延迟。发现EP-P / N13身高潜伏期的回归线为多项式曲线;尽管通过？F？发现回归显着。测试（alpha = 1％），该模型的R2值较低（0.41）。 P / N13-N19峰间潜伏期回归曲线也是如此，但在这种情况下，α= 5％时回归显着。尽管波间潜伏期是临床解释中位SEP的最有用参数，但绝对潜伏期有时可能很重要，应根据体型进行校正。在异常高的受试者中，使用同时考虑肢体长度和NCV的模型，通过估计最大预期P / N13潜伏期来仔细检查EP-P / N13的波间潜伏期延长可能会有用。

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