Cross-modal plasticity and cochlear implants

Dong Soo Lee (), Jae Sung Lee, Seung Ha Oh, Seok-Ki Kim, Jeung-Whoon Kim, June-Key Chung, Myung Chul Lee and Chong Sun Kim
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Dong Soo Lee: Departments of Nuclear Medicine Seoul National University College of Medicine
Jae Sung Lee: Departments of Nuclear Medicine Seoul National University College of Medicine
Seung Ha Oh: Otolaryngology, Head and Neck Surgery, Seoul National University College of Medicine
Seok-Ki Kim: Departments of Nuclear Medicine Seoul National University College of Medicine
Jeung-Whoon Kim: Biomedical Engineering, Seoul National University College of Medicine
June-Key Chung: Departments of Nuclear Medicine Seoul National University College of Medicine
Myung Chul Lee: Departments of Nuclear Medicine Seoul National University College of Medicine
Chong Sun Kim: Otolaryngology, Head and Neck Surgery, Seoul National University College of Medicine

Nature, 2001, vol. 409, issue 6817, 149-150

Abstract: Abstract Hearing in profoundly deaf people can be helped by inserting an implant into the inner ear to stimulate the cochlear nerve. This also boosts the low metabolic activity of the auditory cortex1, the region of the brain normally used for hearing. Other sensory modalities, such as sign language2, can also activate the auditory cortex, a phenomenon known as cross-modal plasticity. Here we show that when metabolism in the auditory cortex of prelingually deaf children (whose hearing was lost before they learned to talk) has been restored by cross-modal plasticity, the auditory cortex can no longer respond to signals from a cochlear implant installed afterwards. Neural substrates in the auditory cortex might therefore be routed permanently to other cognitive processes in prelingually deaf patients.

Date: 2001
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DOI: 10.1038/35051653

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