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Inhibitory motor control at five years as a function of prenatal cocaine exposure
Margaret Bendersky1, Giorgia Gambini, Anna Lastella
1Institute for the Study of Child Development, Robert Wood Johnson Medical School, New Brunswick, NJ 08903, USA.
Insights
Prenatal cocaine exposure negatively impacts children's inhibitory control, especially in low-risk environments. This finding highlights the crucial role of environmental factors in moderating developmental outcomes for exposed children.
Area of Science:
- Neuroscience
- Developmental Psychology
- Child Health
Background:
- Prenatal substance exposure, particularly cocaine, is a significant concern for child development.
- Inhibitory control is a critical executive function that develops throughout childhood.
- The impact of prenatal cocaine exposure on neurodevelopmental outcomes requires further investigation, considering environmental moderators.
Purpose of the Study:
- To examine the relationship between prenatal cocaine exposure and motor response inhibition in 5-year-old children.
- To investigate whether environmental risk factors modify the effects of prenatal cocaine exposure on inhibitory control.
- To identify factors associated with poorer inhibitory control in early childhood.
Main Methods:
- A cohort of 140 five-year-old children was assessed.
- The Contrary Tapping task was used to measure motor response inhibition.
- Statistical analyses examined the effects of prenatal cocaine exposure, environmental risk, gender, and child IQ on performance.
Main Results:
- Cocaine exposure, high environmental risk, male gender, and low child IQ were all associated with poorer inhibitory control.
- A significant interaction revealed that prenatal cocaine exposure's negative impact on inhibitory control was most pronounced in low-risk environments.
- Cocaine-exposed children in low-risk settings made errors earlier than unexposed children, while this difference diminished in high-risk settings.
Conclusions:
- Prenatal cocaine exposure can impair inhibitory control in young children.
- Environmental risk significantly moderates the effects of prenatal cocaine exposure on child development.
- Interventions should consider both direct effects of prenatal exposure and the child's environmental context.
Abstract:
This study examined children's (n = 140, age 5 years) ability to inhibit a motor response as a function of prenatal cocaine exposure. We hypothesized that cocaine-exposed children would perform worse than unexposed children on the Contrary Tapping task. Results indicated that cocaine exposure, high environmental risk, male gender, and low child IQ each were related to poorer inhibitory control. An interaction indicated that cocaine effects were specific to children who lived in relatively low-risk environments. Cocaine-exposed children made an error sooner than unexposed children in low-risk environments but in the same trial as both exposed and unexposed children living in high-risk environments. Potential underlying mechanisms and the importance of examining cocaine exposure effects in the context of children's existing environment are discussed.
