Related Experiment Video
Updated: Jun 28, 2026
Dissecting the Non-human Primate Brain in Stereotaxic Space
Published on: July 16, 2009
Neuronal reduction in frontal cortex of primates after prenatal alcohol exposure
Mark W Burke1, Roberta M Palmour, Frank R Ervin
1Department of Physiology, University of Montreal, Montreal, Quebec, Canada.
Insights
Prenatal alcohol exposure in vervet monkeys caused fetal alcohol spectrum disorders (FASD) with fewer frontal lobe cells. This brain damage in FASD offspring correlates with observed behavioral and cognitive deficits.
Area of Science:
- Neuroscience
- Developmental Biology
- Toxicology
Background:
- Fetal alcohol spectrum disorders (FASD) are linked to frontal lobe dysfunction, but imaging studies haven't fully clarified the extent of damage.
- The St Kitts vervet monkey, a species that voluntarily consumes alcohol, serves as a model for studying prenatal ethanol exposure effects.
Purpose of the Study:
- To investigate the impact of prenatal ethanol exposure on frontal lobe cytoarchitecture in vervet monkeys.
- To correlate observed brain changes with behavioral and cognitive impairments characteristic of FASD.
Main Methods:
- Pregnant vervet monkeys received the equivalent of 3-5 standard alcoholic drinks four times weekly during the third trimester.
- Unbiased stereology was employed to estimate neuronal populations in the frontal lobes of offspring.
Main Results:
- Offspring exposed to ethanol prenatally exhibited a significant reduction in frontal lobe neurons.
- An increased density of interstitial white matter neurons was observed in the FASD offspring.
Conclusions:
- Prenatal ethanol exposure leads to specific cytoarchitectonic alterations in the frontal lobe.
- These structural brain changes in FASD offspring are consistent with documented behavioral and cognitive deficits.
Abstract:
Children with fetal alcohol spectrum disorders (FASD) show behavioral and intellectual impairments that indicate frontal lobe dysfunction, but the extent of damage to this region has not been clarified by brain imaging studies. This study uses the St Kitts vervet monkey, a species that voluntarily consumes beverage alcohol, to examine the effects of prenatal ethanol exposure. Pregnant vervets were allowed to drink the equivalent of 3-5 standard drinks four times a week during the third trimester. Using unbiased stereology, we estimated neuronal reduction and found significantly fewer cells in the frontal lobes of FASD offspring as well as an increased density of interstitial white matter neurons. These cytoarchitectonic effects are consistent with the behavioral and cognitive changes observed in FASD.
