Effects of alcohol consumption on lateralized aggression in Anolis carolinensis

Brain Research
A W Deckel

Abstract

Previous work has suggested that the lizard Anolis carolinensis, like many other reptiles, has a functionally split brain. Specifically, the left eye of this species projects primarily to the right hemisphere (and vice versa), there is no corpus callosum, and the physical placement of the eyes restricts their field(s) of vision to one region of hemispace. The current experiment used this preparation to examine the effect of alcohol administration and withdrawal on lateralized brain functioning during territorial aggression. Thirteen adult males were divided into control (CON) or alcohol (ETOH) groups. Baseline territorial aggression was assessed, following which ETOH subjects were then given twice daily solutions of 19% alcohol. After 19 days of ETOH consumption, territorial aggression was again assessed. Eye use during aggressive encounters was measured either following short periods (24 h) of alcohol withdrawal, or 90 m following alcohol consumption. Control subjects were found to have a predominance of left eye/right hemisphere-mediated aggressive responses, as has previously been reported. Alcohol withdrawn subjects were found to have a suppression of left eye/right hemisphere-mediated aggression. This reached statistical s...Continue Reading

References

Jan 1, 1987·Psychopharmacology·B ZimmerbergE P Riley
Jul 1, 1981·Electroencephalography and Clinical Neurophysiology·D SimpsonM Linnoila
Sep 28, 1984·Science·H BegleiterB Kissin
Dec 1, 1982·Proceedings of the National Academy of Sciences of the United States of America·R ElmasianF Bloom

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Citations

Oct 8, 1999·Behavioural Brain Research·L FacchinG Vallortigara
Oct 30, 2004·Laterality·Giuseppe LippolisGiorgio Vallortigara

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