视力与视觉诱发电位的相关分析

THE CORRELATIVE ANALYSIS BETWEEN VISUAL ACUITY AND VEPs

对104例病人的图形翻转VEP的瞬态波形各参数,以及9例正常或近视学生的稳态曲线功率谱与视力之间的关系进行了多元相关统计分析,旨在探讨VEP的哪些参数可客观地评估视力.结果表明,瞬态VEP的波形参数中以13’格诱发的N_1P_1、P_1N_2的峰峰值及P_(100)潜伏期与视力的相关系数最大,故认为,分析视力时以平均P_(100)波的波幅值和P_(100)波潜伏期作指标较为灵敏;而稳态、VEP能谱曲线则显示,视力与平均相叶能谱或刺激频率点的能谱相关性较大,与二次谐波的相关性则小.

The transient pattern reversal visual evoked potentials (t-PRVEPs) and steady-state pattern reversal visual evoked potentials (s -PRVEPs) were recorded from 104 outpatients and 9 young normal or myopic students, respectively. The correlative analysis between the visual acuities and the parameters in waves of t-PRVEPs or the spectrum of s -PRVEPs was performed. The results indicated that the parameters such as N1P1 , P1N2 peak - to - trough and the latency of P100 showed a direct correlation between the wave of t -PRVEPs and visual acuity, when the spatial frequency of 13' checkboards were used. So it was suggested that when the visual acuity was analysed by the waves of t-PRVEPs , the parameters of average P100 amplitudes and the latency of P100 should be used. Also the results indicated that the visual acuity was related to the average relative spectrum or the spectrum of fundamental recorded in s -PRVEPs, however , the second harmonic had less correlation.