| Perceptual learning evidence for tuning to spectrotemporal modulation in the human auditory system. | |
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MedLine Citation:
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PMID: 22573676 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Natural sounds are characterized by complex patterns of sound intensity distributed across both frequency (spectral modulation) and time (temporal modulation). Perception of these patterns has been proposed to depend on a bank of modulation filters, each tuned to a unique combination of a spectral and a temporal modulation frequency. There is considerable physiological evidence for such combined spectrotemporal tuning. However, direct behavioral evidence is lacking. Here we examined the processing of spectrotemporal modulation behaviorally using a perceptual-learning paradigm. We trained human listeners for ∼1 h/d for 7 d to discriminate the depth of spectral (0.5 cyc/oct; 0 Hz), temporal (0 cyc/oct; 32 Hz), or upward spectrotemporal (0.5 cyc/oct; 32 Hz) modulation. Each trained group learned more on their respective trained condition than did controls who received no training. Critically, this depth-discrimination learning did not generalize to the trained stimuli of the other groups or to downward spectrotemporal (0.5 cyc/oct; -32 Hz) modulation. Learning on discrimination also led to worsening on modulation detection, but only when the same spectrotemporal modulation was used for both tasks. Thus, these influences of training were specific to the trained combination of spectral and temporal modulation frequencies, even when the trained and untrained stimuli had one modulation frequency in common. This specificity indicates that training modified circuitry that had combined spectrotemporal tuning, and therefore that circuits with such tuning can influence perception. These results are consistent with the possibility that the auditory system analyzes sounds through filters tuned to combined spectrotemporal modulation. |
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Authors:
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Andrew T Sabin; David A Eddins; Beverly A Wright |
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Publication Detail:
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Type: Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, N.I.H., Extramural |
Journal Detail:
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Title: The Journal of neuroscience : the official journal of the Society for Neuroscience Volume: 32 ISSN: 1529-2401 ISO Abbreviation: J. Neurosci. Publication Date: 2012 May |
Date Detail:
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Created Date: 2012-05-10 Completed Date: 2012-07-06 Revised Date: 2013-04-01 |
Medline Journal Info:
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Nlm Unique ID: 8102140 Medline TA: J Neurosci Country: United States |
Other Details:
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Languages: eng Pagination: 6542-9 Citation Subset: IM |
Affiliation:
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Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL 60208, USA. a-sabin@northwestern.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation
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methods* Adolescent Adult Auditory Perception / physiology* Discrimination Learning / physiology* Female Humans Male Psychomotor Performance / physiology* Time Factors Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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F31 DC009549/DC/NIDCD NIH HHS; F31DC009549/DC/NIDCD NIH HHS; R01DC004453/DC/NIDCD NIH HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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