期刊
JOURNAL OF NEUROPHYSIOLOGY
卷 114, 期 5, 页码 2726-2740出版社
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/jn.00095.2015
关键词
auditory cortex; hierarchical coding; invariance; processing; vocalizations
资金
- NIDCD Grants [R03-DC-013660, R01-DC-014479]
- Klingenstein Foundation Award in Neurosciences
- Burroughs Wellcome Fund Career Award at Scientific Interface
- Human Frontiers in Science Foundation Young Investigator Award
- Pennsylvania Lions Club Hearing Research Fellowship
- Cognition and Perception IGERT training grant
- Hearst Foundation Fellowship
- NSF [PHY1058202]
- US-Israel BSF [2011058]
An essential task of the auditory system is to discriminate between different communication signals, such as vocalizations. In everyday acoustic environments, the auditory system needs to be capable of performing the discrimination under different acoustic distortions of vocalizations. To achieve this, the auditory system is thought to build a representation of vocalizations that is invariant to their basic acoustic transformations. The mechanism by which neuronal populations create such an invariant representation within the auditory cortex is only beginning to be understood. We recorded the responses of populations of neurons in the primary and nonprimary auditory cortex of rats to original and acoustically distorted vocalizations. We found that populations of neurons in the nonprimary auditory cortex exhibited greater invariance in encoding vocalizations over acoustic transformations than neuronal populations in the primary auditory cortex. These findings are consistent with the hypothesis that invariant representations are created gradually through hierarchical transformation within the auditory pathway.
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