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Autoregressive analysis of flash evoked potentials in healthy preterm infants during sleep

Chen Xiaolong, Pan Xiaoli, Meng Shuying

Department of Ophthalmology,Second Hospital,China Medical University.Shenyang 110004,Liaoning；China

Abstract

To interpret the flash evoked potential (FVEP) as dynamic high-order responses to natural and experimental stimulation in healthy preterm infants, waveform analysis of FVEP in 36 healthy preterm infants (postconceptional age 28-42 weeks) were performed using an autoregressive analysis. Based on the histogram of damping frequency of different component impulse response waveforms, the waveforms were divided into 4 groups: group I (0-<2Hz), group II (2-<6.5Hz), group III (6.5-<12.0Hz) and group IV (12-25Hz). The total power, power of component impulse responses (group I-IV), and damping time (group II-IV) changed significantly with increasing postconceptional age (P<0.01 or P<0.05). Identification of an impulse response component with dominant frequency which undergoes a well-identified change with age is considered to be a useful tool for discriminating between normal and abnormal changes in the FVEP with age in healthy preterm infants.

Key words: Preterm infants;Flash visual evoked potential(FVEP);Autoregressive analysis

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Citing This Article：

Chen Xiaolong, Pan Xiaoli, Meng Shuying. Autoregressive analysis of flash evoked potentials in healthy preterm infants during sleep. Acta Physiol Sin 2002; 54 (5): (in Chinese with English abstract).