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Visual evoked potentials in term light-for-gestational-age infants and infants of diabetic mothers
S Petersen1, O Pryds, W Trojaborg
1Department of Neonatology, State University Hospital (Rigshospitalet), Copenhagen, Denmark.
Insights
Visual evoked potentials (VEP) in newborns show that light-for-gestational-age (LGA) infants have faster visual processing speeds and higher amplitudes compared to appropriate-for-gestational-age (AGA) infants. These differences may be linked to stress maturation or smaller head circumference in LGA infants.
Area of Science:
- Neonatal Neuroscience
- Developmental Ophthalmology
- Clinical Neurophysiology
Background:
- Visual evoked potentials (VEP) are crucial for assessing visual pathway maturation in infants.
- Understanding early neurodevelopmental markers is vital for identifying potential risks.
Purpose of the Study:
- To investigate visual evoked potentials (VEP) in term newborns, comparing infants of different gestational age and maternal conditions.
- To explore the relationship between VEP parameters and anthropometric measurements in neonates.
Main Methods:
- Evaluated VEP latency and amplitude in 52 term infants within 48 hours of birth.
- Subgroups included light-for-gestational-age (LGA), appropriate-for-gestational-age (AGA), and infants of diabetic mothers (IDM).
- Correlated VEP findings with birth weight deviation, gestational age, and head circumference.
Main Results:
- LGA infants exhibited shorter VEP latency and higher VEP amplitude compared to AGA infants.
- VEP latency in LGA infants was related to birth weight deviation, gestational age, and head circumference.
- No significant differences in VEP latency or amplitude were observed between IDM and AGA infants.
Conclusions:
- The faster VEP conduction velocity in LGA infants may be attributed to stress maturation or smaller head circumference.
- VEP parameters provide insights into the neurophysiological development of newborns based on their growth status.
Abstract:
The latency and amplitude of the first negative peak of visual evoked potentials (VEP) were evaluated in 52 term infants, investigated within 48 h after birth. Sixteen were light-for-gestational-age (LGA), 16 were appropriate-for-gestational-age (AGA) and 20 were infants of diabetic mothers (IDM). The VEP latency was shorter in LGA infants compared to AGA infants, and it was closely related to the birth weight deviation. The VEP latency was inversely related to gestational age and positively related to head circumference. When corrected for gestational age and head circumference, the VEP latency was not significantly different between the subgroups, nor related to the birth weight deviation, ponderal index or skinfold thickness. Thus, it could be argued that the high conduction velocity in LGA infants is due to stress maturation or alternatively due to the smaller head circumference. The VEP amplitude was higher in LGA infants when compared with AGA infants, and inversely related to the birth weight deviation. No differences were found in VEP latency or VEP amplitude between IDM and AGA infants.