Study on visual evoked potential in children with learning disability

ZHANG Kai-feng; XU Xiu; FENG Jing-jing; LIU Jing

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Chinese Journal of Child Health Care ›› 2012, Vol. 20 ›› Issue (6) : 489-491.

Study on visual evoked potential in children with learning disability

ZHANG Kai-feng,XU Xiu,FENG Jing-jing,LIU Jing

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Abstract

【Objective】 To study the pattern reversal visual evoked potential (PRVEP) characteristics of children with learning disability. 【Methods】 The group of 42 children with learning disability(LD) were diagnosed by ICD-10.The control group of 37 normal children were from ordinary primary schools.They were tested by PRVEP at five levels of spatial frequency. 【Results】 1)As spatial frequency increaseing,the latencies of P100 in the two groups of children were extended.And the amplitudes of P100 in the two groups of children were reduced.2)The latencies of P100 wave were significantly prolonged at all five spatial frequency in the LD group compared with the control group(P<0.05).The amplitudes of P100 in the LD group were significantly smaller than those in the control group at the 27',13',7' three spatial frequency(P<0.05). 【Conclusions】 The latencies of P100 wave are longer and the amplitudes are smaller in LD group than those in control group.It is indicated that the transmission function of retinal ganglion cells to the visual center deal difficultly in the children with LD and the visual information processing speed slow down.

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learning disabilities / pattern reversal visual evoked potential / children

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ZHANG Kai-feng,XU Xiu,FENG Jing-jing,LIU Jing. Study on visual evoked potential in children with learning disability[J]. Chinese Journal of Child Health Care. 2012, 20(6): 489-491

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