NDLI: Neural codes for perceptual discrimination of acoustic flutter in the primate auditory cortex

Content Provider	PubMed Central
Author	Lemus, Luis Hernández, Adrián Romo, Ranulfo
Abstract	We recorded from single neurons of the primary auditory cortex (A1), while trained monkeys reported a decision based on the comparison of 2 acoustic flutter stimuli. Crucially, to form the decision, monkeys had to compare the second stimulus rate to the memory trace of the first stimulus rate. We found that the responses of A1 neurons encode stimulus rates both through their periodicity and through their firing rates during the stimulation periods, but not during the working memory and decision components of this task. Neurometric thresholds based on firing rate were very similar to the monkey's discrimination thresholds, whereas neurometric thresholds based on periodicity were lower than the experimental thresholds. Thus, an observer could solve this task with a precision similar to that of the monkey based only on the firing rates evoked by the stimuli. These results suggest that the A1 is exclusively associated with the sensory and not with the cognitive components of this task.
Related Links	http://dx.doi.org/10.1073/pnas.0904066106
Ending Page	9476
Page Count	6
Starting Page	9471
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	23
Volume Number	106
Language	English
Publisher	National Academy of Sciences
Publisher Date	2009-06-09
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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