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Published on: July 13, 2014
The Association of Prenatal Alcohol Exposure With Brain Development During the First 1000 Days of Life: A Systematic
Marin Pielage1, Melek Rousian1, Sem van Heteren1
1Department of Obstetrics and Gynaecology, Erasmus MC, University Medical Centre Rotterdam, Rotterdam, The Netherlands.
Insights
Prenatal alcohol exposure (PAE) shows inconsistent effects on early brain development. Research indicates potential impacts on brain structure and network connectivity in infants, necessitating further investigation.
Area of Science:
- Neuroscience
- Developmental Biology
- Public Health
Background:
- Prenatal alcohol exposure (PAE) poses risks to offspring health, yet its specific effects on early brain development remain unclear.
- Understanding PAE's impact on the developing brain during the critical first 1000 days is vital for early intervention strategies.
Approach:
- A systematic review was conducted, searching major databases (EMBASE, MEDLINE, Web of Science, PsycINFO, Cochrane Library) until February 2024.
- Included studies utilized ultrasound, magnetic resonance imaging (MRI), or diffusion tensor imaging (DTI) to assess brain development in infants exposed to alcohol prenatally.
- 16 studies were included from an initial 3618 articles, focusing on the first 1000 days of life.
Key Points:
- Ultrasound findings on brain size in relation to PAE were inconclusive.
- Postnatal MRI studies suggested smaller thalamic, amygdala, and hippocampal volumes in neonates with PAE.
- Diffusion tensor imaging (DTI) studies reported mixed results regarding brain network integrity and connectivity in infants exposed to alcohol.
Conclusions:
- Current evidence shows inconsistent associations between PAE and early brain development, with some studies indicating structural changes and others reporting bidirectional network effects.
- Further research is needed to clarify the impact of alcohol exposure timing, quantity, and first-trimester development on the infant brain.
- Standardized neuroimaging protocols and longitudinal assessments are crucial for a comprehensive understanding of PAE's long-term neurological consequences.
Abstract:
Prenatal exposure to alcohol (PAE) can impact short- and long-term offspring health. However, knowledge on PAE and brain development in early life is limited. This systematic review investigated associations between PAE and brain development during the first 1000 days of life, and was registered in PROSPERO at CRD42022355144. The literature search was performed from inception until February 2024 in EMBASE, MEDLINE, Web of Science, PsycINFO, and the Cochrane Library. Studies investigating PAE and brain development during the first 1000 days using ultrasound, magnetic resonance imaging (MRI) or diffusion tensor imaging (DTI) were included. Our search initially identified 3618 articles, of which 16 were included. The findings suggest inconsistent associations between PAE and early brain development. Ultrasound studies on PAE and brain size report no clear relationship. Some postnatal MRI studies reported smaller thalami, amygdalae and hippocampi in alcohol exposed neonates. Postnatal DTI studies (n = 5) examining network integrity and connectivity reported bidirectional results in multiple brain networks. Our results highlight the need for further research on first trimester brain development, timing and quantity of alcohol exposure using a core set of validated instruments. Longitudinal assessments and standardized procedures for neuroimaging are crucial to understand the impact of PAE on early brain development.
