Document Type

Article

Disciplines

Medicine and Health Sciences

Abstract

Abstract

Background

While there is extensive literature on the relationship between the P3 component of event-related potentials (ERPs) and risk for alcoholism, there are few published studies regarding other potentially important ERP components. One important candidate is the N4(00) component in the context of semantic processing, as abnormalities in this component have been reported for adult alcoholics.

Method

A semantic priming task was administered to non-alcohol dependent male offspring (18 to 25 years) of alcoholic fathers [high risk (HR) n=23] and non-alcoholic fathers [low risk (LR) n=28], to study whether the two groups differ in terms of the N4 component. Subjects were presented with 150 words and 150 non-words. Among the words, 50 words (primed) were preceded by their antonyms (prime, n=50), whereas the remaining 50 words were unprimed. For the analysis, N4 amplitude and latency, as well as behavioral measures for the primed and unprimed words were considered.

Results

A significant interaction effect was observed between semantic condition and group, where HR subjects did not show N4 attenuation for primed stimuli.

Conclusion

The lack of N4 attenuation to primed stimuli and/or inability to differentiate between primed and unprimed stimuli, without latency and reaction time being affected, suggest deficits in semantic priming, especially in semantic expectancy and/or post-lexical semantic processing in HR male offspring. Further, it indicates that it might be an electrophysiological endophenotype that reflects genetic vulnerability to develop alcoholism.

Comments

Alcohol Clin Exp Res. Author manuscript; available in PMC 2013 March 19. Published in final edited form as: Alcohol Clin Exp Res. 2009 December; 33(12): 2027–2036. Published online 2009 September 17. doi: 10.1111/j.1530-0277.2009.01042.x PMCID: PMC3601897 NIHMSID: NIHMS235806

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