Increased cortical activation during hearing of speech in cochlear implant users

To investigate the cortical activities while listening to noise and speech in cochlear implant (CI) users, we compared cerebral blood flow in postlingually deafened CI users with that in normal hearing subjects using positron emission tomography. While noise activation in CI users did not significan...

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Bibliographic Details
Published in:Hearing research 2000-05, Vol.143 (1), p.139-146
Main Authors: Naito, Yasushi, Tateya, Ichiro, Fujiki, Nobuya, Hirano, Shigeru, Ishizu, Koichi, Nagahama, Yasuhiro, Fukuyama, Hidenao, Kojima, Hisayoshi
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Brain Mapping
Cerebral Cortex - physiology
Cerebral Cortex - physiopathology
Cochlear implant
Cochlear Implants
Deafness - physiopathology
Deafness - therapy
Ear, auditive nerve, cochleovestibular tract, facial nerve: diseases, semeiology
Humans
Language
Male
Medical sciences
Neuronal network
Noise
Non tumoral diseases
Otorhinolaryngology. Stomatology
Postlingual deafness
Reference Values
Speech activation
Speech Perception - physiology
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Summary:To investigate the cortical activities while listening to noise and speech in cochlear implant (CI) users, we compared cerebral blood flow in postlingually deafened CI users with that in normal hearing subjects using positron emission tomography. While noise activation in CI users did not significantly differ from that in normal subjects, hearing speech activated more cortical areas in CI users than in normal subjects. A comparison of speech activation in these two groups revealed higher activation in CI users not only in the temporal cortices but also in Broca’s area and its right hemisphere homologue, the supplementary motor area and the anterior cingulate gyrus. In postlingually deafened subjects, the hearing of speech coded by CI may be accompanied by increased activation of both the temporal and frontal cortices.
ISSN:0378-5955
1878-5891
DOI:10.1016/S0378-5955(00)00035-6