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Motor development of cocaine-exposed children at age two years
R Arendt1, J Angelopoulos, A Salvator
1Department of Pediatrics, Case Western Reserve University, School of Medicine, Cleveland, Ohio, USA.
Insights
Prenatal cocaine exposure negatively impacts children's motor skills. Cocaine-exposed children showed significant deficits in fine and gross motor development by age two.
Area of Science:
- Pediatric developmental psychology
- Neurodevelopmental disorders
- Prenatal substance exposure research
Background:
- Prenatal exposure to substances like cocaine can impact child development.
- Motor development is a critical area of early childhood assessment.
- Understanding long-term effects is crucial for early intervention.
Purpose of the Study:
- To investigate the effects of prenatal cocaine exposure on motor development in young children.
- To assess motor skills in an underprivileged, urban population.
- To identify specific areas of motor deficit associated with prenatal drug exposure.
Main Methods:
- Recruited 260 infants from an urban hospital's newborn nursery and at-risk clinic.
- Collected prenatal history, birth outcomes, and maternal drug histories.
- Assessed 199 children at age 2 using the Peabody Developmental Motor Scales by blinded examiners.
Main Results:
- Cocaine-exposed children performed significantly worse on fine and gross motor indices compared to controls.
- Deficits were noted in balance, receipt/propulsion (gross motor), hand use, and eye-hand coordination (fine motor).
- Cocaine exposure independently predicted poorer scores in hand use and eye-hand coordination; alcohol exposure affected receipt and propulsion.
Conclusions:
- Motor development deficiencies are detectable at age 2 in children with prenatal drug exposure.
- Prenatal cocaine and alcohol exposure can lead to developmental challenges impacting later achievement.
- Environmental factors may influence development, but in utero substance exposure poses significant risks.
Objective:
This article was designed to investigate effects of prenatal cocaine exposure on motor development of young children from a predominately underprivileged, urban population.
Methodology:
A total of 260 infants and young children were initially recruited from either the newborn nursery or the at-risk pediatric clinic of an urban teaching hospital. Prenatal history and birth outcomes were collected from medical records. Demographic characteristics and additional drug histories were obtained from the mothers. The 199 subjects (98 cocaine-exposed and 101 unexposed) who returned at age 2 years were assessed by examiners blinded to drug exposure status using the Peabody Developmental Motor Scales.
Results:
Compared with control subjects, the cocaine-exposed group performed significantly less well on both the fine and the gross motor development indices. Mean scores for both groups were within the average range on the gross motor index, but greater than 1 standard deviation below average on the fine motor index. Differences were significant on the balance and the receipt and propulsion subscales of the gross motor scale, and on the hand use and the eye-hand coordination subscales of the fine motor scale. Cocaine status independently predicted poorer hand use and eye-hand coordination scores. There also was an effect of alcohol exposure on the receipt and propulsion subscale.
Conclusions:
Findings indicate that deficiencies in motor development remain detectable at 2 years of age in children exposed to drugs prenatally. Although other environmental variables may influence motor development, children exposed to cocaine and to alcohol in utero may encounter developmental challenges that impede later achievement.