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How to Obtain Reliable Visual Event-related Potentials in Newborns
Published on: October 24, 2019
Abnormal flash visual evoked potentials in malnourished infants: an evaluation using principal component analysis.
Craig G McDonald1, Cora L Joffe, Ann B Barnet
1Department of Psychology, George Mason University, Fairfax, VA, USA. cmcdona3@gmu.edu
Summary
Severe infant malnutrition (marasmus) alters flash visual evoked potentials (fVEPs), indicating neurophysiological deficits. While some recovery occurred with nutritional remediation, abnormalities persisted, suggesting long-term impacts on visual processing.
Area of Science:
- Neuroscience
- Pediatrics
- Nutritional Science
Background:
- Severe chronic malnutrition, such as marasmus, significantly impacts infant development.
- Neurophysiological functioning, particularly visual processing, may be affected by early-life malnutrition.
Purpose of the Study:
- To characterize the morphology of flash visual evoked potentials (fVEPs) in infants with severe malnutrition.
- To assess the impact of nutritional remediation on fVEP morphology.
Main Methods:
- Applied covariance-based principal component analysis with Promax factor rotation to fVEPs.
- Compared fVEPs from malnourished infants to age-matched controls.
Main Results:
- Marasmic infants showed diminished components in the late positive complex and the N3 component of fVEPs.
- Following nutritional remediation, these specific components normalized.
- An abnormally large late, positive deflection remained evident in fVEPs at discharge.
Conclusions:
- Infant malnutrition significantly alters fVEP morphology compared to controls.
- Nutritional rehabilitation led to partial recovery, but persistent abnormalities suggest incomplete resolution of physiological deficits.
- Early malnutrition may lead to lasting alterations in higher-order visual cortical processing.
