Title |
Dopaminergic control of attentional flexibility: inhibition of return is associated with the dopamine transporter gene (DAT1)
|
---|---|
Published in |
Frontiers in Human Neuroscience, January 2010
|
DOI | 10.3389/fnhum.2010.00053 |
Pubmed ID | |
Authors |
Lorenza S Colzato, Jay Pratt, Bernhard Hommel |
Abstract |
Genetic variability related to the dopamine (DA) transporter gene (DAT1) has received increasing attention as a possible modulator of human cognition. The 9-repeat allele of the DAT1 gene is presumably associated with higher striatal DA levels than the 10-repeat allele, which might support inhibitory control functions. We investigated the impact of the DAT1 gene on the inhibition of return (IOR) effect, which refers to the fact that people are slower to detect a target if it appears in a previously attended location. 140 healthy adults, genotyped for the DAT1 gene, performed an IOR task with stimulus-onset asynchronies (SOAs) between attention cue and target of 150-1200 ms. Nine-repeat carriers showed more pronounced IOR effect than 10/10 homozygous at short SOAs but both groups of subjects eventually reached the same magnitude of IOR. Our findings support the idea that striatal DA levels promote IOR, presumably by biasing the interplay between prefrontal and striatal networks towards greater cognitive flexibility. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 2 | 2% |
Italy | 1 | 1% |
Germany | 1 | 1% |
Spain | 1 | 1% |
United Kingdom | 1 | 1% |
Unknown | 76 | 93% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 22 | 27% |
Researcher | 19 | 23% |
Student > Master | 7 | 9% |
Professor | 5 | 6% |
Student > Bachelor | 5 | 6% |
Other | 15 | 18% |
Unknown | 9 | 11% |
Readers by discipline | Count | As % |
---|---|---|
Psychology | 42 | 51% |
Neuroscience | 13 | 16% |
Agricultural and Biological Sciences | 6 | 7% |
Medicine and Dentistry | 3 | 4% |
Nursing and Health Professions | 2 | 2% |
Other | 5 | 6% |
Unknown | 11 | 13% |