期刊
BRAIN RESEARCH
卷 1239, 期 -, 页码 56-65出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.brainres.2008.08.026
关键词
Auditory evoked potential; Critical period; Deafness; Development; Neuroplasticity; Source localization
资金
- National Institutes of Health [NIH-NIDCD R01-DC004552, NIH-NIDCD R01-DC006257]
Congenital deafness leads to atypical organization of the auditory nervous system. However, the extent to which auditory pathways reorganize during deafness is not well understood. We recorded cortical auditory evoked potentials in normal hearing children and in congenitally deaf children fitted with cochlear implants. High-density EEG and source modeling revealed principal activity from auditory cortex in normal hearing and early implanted children. However, children implanted after a critical period of seven years revealed activity from parietotemporal cortex in response to auditory stimulation, demonstrating reorganized cortical pathways. Reorganization of central auditory pathways is limited by the age at which implantation occurs, and may help explain the benefits and limitations of implantation in congenitally deaf children. (C) 2008 Elsevier B.V. All rights reserved.
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