Abstract:
:Postlingually deaf subjects learn the meaning of sounds after cochlear implantation by forming new associations between sounds and their sources. Implants generate coarse frequency responses, preventing place-coding fine enough to discriminate sounds with similar temporal characteristics, e.g., buck/duck. This limitation imposes a dependency on visual cues, e.g., lipreading. We hypothesized that cross-modal facilitation results from engagement of the visual cortex by purely auditory tasks. In four functional neuroimaging experiments, we show recruitment of early visual cortex (V1/V2) when cochlear implant users listen to sounds with eyes closed. Activity in visual cortex evolved in a stimulus-specific manner as a function of time from implantation reflecting experience-dependent adaptations in the postimplant phase.
journal_name
Neuronjournal_title
Neuronauthors
Giraud AL,Price CJ,Graham JM,Truy E,Frackowiak RSdoi
10.1016/s0896-6273(01)00318-xsubject
Has Abstractpub_date
2001-06-01 00:00:00pages
657-63issue
3eissn
0896-6273issn
1097-4199pii
S0896-6273(01)00318-Xjournal_volume
30pub_type
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