Abnormalities in parentally rated executive function in methamphetamine/polysubstance exposed children
Brian J Piper1, Summer F Acevedo, Galena K Kolchugina
1Methamphetamine Abuse Research Center, ONPRC, Oregon Health and Science University, USA.
Insights
Prenatal methamphetamine/polysubstance exposure in women affects child neurobehavior. Exposed children showed more executive function issues and subtle spatial learning deficits.
Area of Science:
- Neuroscience
- Developmental Psychology
- Public Health
Background:
- Methamphetamine/polysubstance abuse among women of childbearing age poses risks to fetal brain development.
- In utero drug exposure can lead to long-term neurobehavioral deficits in children.
Purpose of the Study:
- To assess the neurobehavioral effects of prenatal methamphetamine/polysubstance exposure on children aged 7-9.
- To identify specific cognitive and executive function domains impacted by in utero drug exposure.
Main Methods:
- Utilized a battery of neurobehavioral tests: Wechsler Abbreviated Scale of Intelligence, Conners' Continuous Performance Test II, Behavioral Rating Inventory of Executive Function, CMS Family Pictures, Dot Location, Spatial Span, and Memory Island.
- Compared 7-9 year old children with (N=31) and without (N=35) prenatal methamphetamine/polysubstance exposure from similar socioeconomic backgrounds.
Main Results:
- Children with prenatal drug exposure exhibited significantly higher parent-reported executive function problems, including behavioral regulation and metacognition.
- Subtle deficits in spatial learning and memory were observed in exposed children on the Memory Island test.
- Intelligence quotient (IQ), vigilance, and other tested cognitive functions remained unaffected by prenatal drug exposure history.
Conclusions:
- Prenatal methamphetamine/polysubstance exposure is associated with a specific profile of neurobehavioral abnormalities in children.
- Executive functions, particularly behavioral regulation and metacognition, are selectively vulnerable to in utero drug exposure.
- Further research is warranted to understand the long-term implications and potential interventions for affected children.
Abstract:
Methamphetamine/polysubstance abuse in women of childbearing age is a major concern because of the potential long-term detrimental effects on the brain function of the fetus following in utero exposure. A battery of established tests, including the Wechsler Abbreviated Scale of Intelligence, Conners' Continuous Performance Test II, Behavioral Rating Inventory of Executive Function, the CMS Family Pictures and Dot Location tests, the Spatial Span test from the WISC-IV-Integrated, and a recently developed spatial learning and memory measure (Memory Island), was used to assess the effects of prenatal drug exposure on neurobehavioral performance. Participants were 7 to 9 year old children from similar socioeconomic backgrounds who either had (N=31) or had not (N=35) been exposed to methamphetamine/polysubstance during pregnancy. Compared to unexposed children, exposed children showed pronounced elevations (i.e. more problems) in parental ratings of executive function, including behavioral regulation and metacognition. Exposed children also exhibited subtle reductions in spatial performance in the Memory Island test. In contrast, IQ, Spatial Span, Family Pictures, Dot Location, and vigilance performance were unaffected by prenatal drug exposure history. Thus, children of women who reported using methamphetamine and other recreational drugs during pregnancy showed a selective profile of abnormalities in parentally rated executive function.
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