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Maternal polydrug use including cocaine and postnatal infant sleep architecture: preliminary observations and
J L Gingras1, J B Feibel, L B Dalley
1Department of Pediatrics, Duke University Medical Center, Durham, NC 27710, USA.
Insights
Prenatal cocaine exposure in newborns leads to significant sleep disturbances, including increased wakefulness and more frequent arousals during active sleep. These findings highlight potential impacts on infant behavior and respiratory control.
Area of Science:
- Neonatal Medicine
- Developmental Neuroscience
- Pediatric Sleep Medicine
Background:
- Prenatal drug exposure, particularly to cocaine, can impact infant neurodevelopment.
- Understanding sleep architecture in exposed newborns is crucial for assessing developmental outcomes.
Purpose of the Study:
- To compare sleep architecture and efficiency in infants exposed prenatally to cocaine versus non-exposed infants.
- To investigate the effects of prenatal cocaine exposure on sleep patterns and arousals in term newborns.
Main Methods:
- Overnight pneumocardiograms were used to assess sleep architecture and efficiency in two groups of healthy term newborns.
- Sleep and wakefulness were differentiated by heart rate and respiration patterns.
- Active and quiet sleep stages were identified, and arousals during active sleep were quantified.
Main Results:
- Infants exposed prenatally to cocaine exhibited significantly more wakefulness and less sleep compared to non-exposed infants (P < 0.05).
- Prenatal cocaine exposure was associated with more frequent arousals during active sleep (P < 0.01).
- A tendency towards a higher proportion of active sleep relative to quiet sleep was observed in the exposed group.
Conclusions:
- Prenatal cocaine exposure alters sleep architecture in term newborns, characterized by increased wakefulness and disrupted sleep.
- The observed sleep disturbances, including increased arousals, may have implications for behavioral and respiratory control in infants.
- Further research is warranted to fully understand the long-term consequences of prenatal cocaine exposure on infant development.
Abstract:
Twelve-hour overnight pneumocardiograms were assessed for sleep architecture and sleep efficiency in two groups of healthy term newborn infants: a group exposed prenatally to cocaine alone or in combination with other drugs and a non-exposed group. Sleep was differentiated from wakefulness by an increase in heart rate, an increase in or variation in the duration and amplitude of the respiration and increased artifacts on the heart rate channel. Quiet and active sleep were determined by the regularity or irregularity of heart rate and respiration. In a sub-set of infants, the number of arousals during active sleep was calculated. Overall significance was confirmed by ANOVA followed by paired comparisons using the Student's-test. When compared to non-exposed infants within the first week of life, infants exposed prenatally to cocaine alone or in combination with other drugs demonstrated more wakefulness and less sleep (P < 0.05), more frequent arousals during active sleep (P < 0.01), and the tendency of a higher proportion of active sleep compared to quiet sleep. These findings may have implications to both behavioral and respiratory control findings associated with prenatal cocaine exposure.
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