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See Latest ArticlesA Model of Incomplete Adaptation to a Severely Shifted Frequency-to-Electrode Mapping by Cochlear Implant Users
Journal of the Association for Research in Otolaryngology, 09/29/09
Sagi E et al. – The model predicted that even with complete adaptation, the frequency–shifted map would not have resulted in improved speech understanding. Hence, the model presented here can be used to assess adaptation, and the anticipated gains in speech perception expected from changing a given CI device parameter.
Elad Sagi, 10/01/09
| The model indicates that the process of adaptation to vowel stimuli under a severely-shifted frequency allocation map involves two components. Namely, cochlear implant users are required to adjust their expectations of how vowels should sound, and to remap their vowel labels stored in long term memory. Whereas the former could be achieved within the first week, none of the subjects could accomplish the latter even after using the frequency-shifted map continually for three months. These results suggest that on one hand, the human brain is a wonderfully flexible and plastic tool, and on the other, that there are limits to the brain's auditory plasticity. |
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