Title |
Working Memory Reloaded: Tyrosine Repletes Updating in the N-Back Task
|
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Published in |
Frontiers in Behavioral Neuroscience, January 2013
|
DOI | 10.3389/fnbeh.2013.00200 |
Pubmed ID | |
Authors |
Lorenza S. Colzato, Bryant J. Jongkees, Roberta Sellaro, Bernhard Hommel |
Abstract |
In this study we tested the idea that the food supplement l-Tyrosine (TYR) repletes resources required for cognitive-control operations. We investigated whether the "updating" (and monitoring) of working memory (WM) representations, a key cognitive-control function, can be promoted by administering TYR, the biochemical precursor of dopamine. Participants performed an N-back task where we compared the WM-demanding 2-back condition with the WM-undemanding 1-back condition. As expected, TYR promoted performance in the more demanding (2-back) but not in the easier (1-back) condition, suggesting that TYR selectively targets cognitive-control operations. This result suggests that TYR can replete cognitive resources when more control is needed and, more generally, that food can act as a cognitive enhancer. |
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