Delay in brain growth induced by alcohol in artificially reared rat pups

Alcohol
James R WestD R Pierce

Abstract

The effect of alcohol on body and brain growth of the neonatal rat was examined. An artificial rearing procedure was used to administer a milk formula containing 2.8% alcohol to rat pups during days 4-10 postpartum. Mean blood alcohol levels taken at hourly intervals between feelings at the end of the second day of exposure ranged between 151 and 163 mg/dl. Body growth in both groups of artificially reared pups was similar to that of the suckle control pups. Gross measurements indicated that while alcohol exposure did not arrest body growth, it did arrest several parameters of brain growth. There were deficits in brain weight and volume and in the brain weight to body weight ratio. Furthermore, there were sex-related differences. The brain weight to body weight ratio was significantly decreased in females and there was also a trend toward a greater deficit in brain volume as well. However, deficits in gross measures were not reflected in the development of the hippocampal formation. Areal measurements of the hippocampus and dentate gyrus failed to indicate any differential effects on the growth of the pyramidal and granule cell layers, or their dendritic fields and corresponding Timm-stained sublaminae, due to the alcohol expos...Continue Reading

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