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Published on: August 25, 2014
Neonatal neurological status in a low-risk population after prenatal exposure to cigarettes, marijuana, and alcohol
P A Fried1, B Watkinson, R F Dillon
1Department of Psychology, Carleton University, Ottawa, Ontario, Canada.
Insights
Prenatal exposure to cigarettes, marijuana, and alcohol impacts infant neurological status differently. Cigarette and marijuana exposure showed increased excitation and withdrawal symptoms, respectively, while alcohol showed reduced arousal.
Area of Science:
- Neurodevelopmental science
- Prenatal toxicology
- Pediatric neurology
Background:
- Prenatal exposure to substances like cigarettes, marijuana, and alcohol is a significant concern.
- Understanding the differential impact of these exposures on infant neurological development is crucial.
Purpose of the Study:
- To investigate the distinct neurological effects of prenatal exposure to cigarettes, marijuana, and alcohol in infants.
- To correlate prenatal substance exposure with specific neurological and behavioral outcomes in newborns.
Main Methods:
- Utilized the Prechtl neurological examination to assess infants at 9 and 30 days old.
- Employed discriminant function analyses on data from approximately 250 infants.
- Controlled for potential confounding variables in the analysis.
Main Results:
- Prenatal cigarette exposure linked to hypertonicity and increased nervous system excitation by 30 days.
- Prenatal marijuana exposure associated with symptoms resembling mild narcotic withdrawal.
- Prenatal alcohol exposure correlated with slightly lowered nervous system arousal at 9 days.
Conclusions:
- Prenatal exposure to common substances has differential and significant effects on infant neurological status.
- Findings highlight the importance of considering specific substance effects on neurodevelopment.
- Results align with behavioral observations in neonates exposed to substances prenatally.
Abstract:
The neurological status of 9- and 30-day-old infants, as assessed by the Prechtl neurological examination, was significantly and differentially related to prenatal exposure of cigarettes, marijuana, and alcohol. Data on approximately 250 babies, born to healthy, white, predominantly middle-class women, were analyzed using discriminant function analyses controlling for potentially confounding variables. Prenatal cigarette exposure was associated with hypertonicity and increased nervous system excitation, particularly at 30 days, prenatal marijuana exposure was associated with symptoms similar to mild narcotic withdrawal, and prenatal exposure to relatively low levels of alcohol was associated with slightly lowered nervous system arousal at 9 days of age. The results were related to behavioral observations on neonates exposed to drugs prenatally.
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