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Open Access Highly Accessed Research article

Assessing the molecular genetics of attention networks

John Fossella1*, Tobias Sommer1, Jin Fan1, Yanhong Wu2, James M Swanson1, Donald W Pfaff3 and Michael I Posner1

Author Affiliations

1 Sackler Institute of Developmental Psychobiology, Department of Psychiatry, Weill Medical College of Cornell University, 1300 York Avenue, New York, New York, 10021, USA

2 Department of Psychology, Peking University, China

3 Laboratory of Neurobiology and Behavior, Rockefeller University, 1230 York Avenue, New York, New York, 10021, USA

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BMC Neuroscience 2002, 3:14  doi:10.1186/1471-2202-3-14

Published: 4 October 2002

Abstract

Background

Current efforts to study the genetic underpinnings of higher brain functions have been lacking appropriate phenotypes to describe cognition. One of the problems is that many cognitive concepts for which there is a single word (e.g. attention) have been shown to be related to several anatomical networks. Recently, we have developed an Attention Network Test (ANT) that provides a separate measure for each of three anatomically defined attention networks.

Results

In this study we have measured the efficiency of neural networks related to aspects of attention using the ANT in a population of 200 adult subjects. We then examined genetic polymorphisms in four candidate genes (DRD4, DAT, COMT and MAOA) that have been shown to contribute to the risk of developing various psychiatric disorders where attention is disrupted. We find modest associations of several polymorphisms with the efficiency of executive attention but not with overall performance measures such as reaction time.

Conclusions

These results suggest that genetic variation may underlie inter-subject variation in the efficiency of executive attention. This study also shows that genetic influences on executive attention may be specific to certain anatomical networks rather than affecting performance in a global or non-specific manner. Lastly, this study further validates the ANT as an endophenotypic assay suitable for assessing how genes influence certain anatomical networks that may be disrupted in various psychiatric disorders.