Birtles Deirdre B, Braddick Oliver J, Wattam-Bell John, Wilkinson Andrew R, Atkinson Janette
Department of Experimental Psychology, University of Oxford, Oxford, UK.
Neuroreport. 2007 Dec 3;18(18):1975-9. doi: 10.1097/WNR.0b013e3282f228c8.
Orientation-specific cortical responses develop earlier in infancy than motion-specific responses. The maturation of orientation-reversal and direction-reversal visual evoked potentials was evaluated in 17 healthy, low risk, preterm infants (born <32 weeks gestation), compared with a group of 26 infants born at term. Both groups were studied at a corrected age of 2-4 months. The age function and magnitude of the orientation-reversal responses was similar in the two groups. Direction-reversal responses across the age range, however, were smaller in the preterm infants, suggesting a delayed maturation of motion processing. Reasons for the vulnerability of motion processing are discussed; the results may reflect anomalies of white matter development in preterm infants that are undetected by ultrasonography.
特定方向的皮层反应在婴儿期比特定运动反应更早出现。对17名健康、低风险的早产儿（孕周<32周出生）的方向反转和方向反转视觉诱发电位的成熟情况进行了评估，并与一组26名足月儿进行了比较。两组均在矫正年龄2至4个月时进行研究。两组中方向反转反应的年龄函数和幅度相似。然而，在整个年龄范围内，早产儿的方向反转反应较小，这表明运动处理成熟延迟。文中讨论了运动处理易受影响的原因；结果可能反映了早产儿白质发育的异常，而超声检查未检测到这些异常。
