Imaging Plasticity in Cochlear Implant Patients

Giraud, Anne Lise; Truy, Éric; Frackowiak, R. S. J.

doi:10.1159/000046847

Cited by 103 publications

(84 citation statements)

References 53 publications

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“…Using PET, we were able to study plasticity related to implantation as focal alterations of the functional specialization of speech areas and as modifications at the level of large-scale neural circuits, revealing a particular form of cross-modal interaction (see review by Giraud et al [2001c]). …”

Section: Cochlear Implantsmentioning

confidence: 99%

Functional Imaging of the Auditory System: The Use of Positron Emission Tomography

Johnsrude¹,

Giraud²,

Frackowiak³

2002

Audiol Neurotol

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Modern brain imaging methods now afford unprecedented opportunities for the in vivo study of central auditory system function. Positron emission tomography (PET) has been used as a functional imaging technique for more than 15 years to study the distribution of cerebral haemodynamic changes associated with auditory stimulation, in subjects with normal and abnormal auditory function. Many of these studies concern processes related to, but not identical with, audition, such as speech perception, melodic processing and directed attention. Additionally, PET has been used to explore auditory perception in clinical populations such as cochlear implantees, neurosurgical candidates and people with tinnitus and auditory hallucinations. The spatial resolution of PET does not appear sufficient to address questions of a fine anatomical grain, e.g. exploring functional specialization within the primary and secondary auditory cortex. Nevertheless, PET has considerable potential as a tool in basic research on, and clinical assessment of, many auditory phenomena. Although functional magnetic resonance imaging can now be used for many studies for which formerly only PET was suitable, PET still possesses unique advantages. For example, it permits acquisition of data from inferior frontal and anterior temporal areas, can be used with subjects with cochlear and other implants (such as pacemakers) and can be used to map neurochemical pathways and receptors.

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Section: Cochlear Implantsmentioning

confidence: 99%

Functional Imaging of the Auditory System: The Use of Positron Emission Tomography

Johnsrude¹,

Giraud²,

Frackowiak³

2002

Audiol Neurotol

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“…It may be that dependence on visual information and cross-modal plasticity, which favors visual information processing, have a negative effect on auditory information processing after implantation. In order to successfully perceive auditory speech, integration of audiovisual inputs is known to be crucial [10,11] . However, it seems that too much dependence on visual information before CI acts as an impediment.…”

Section: Discussionmentioning

confidence: 99%

“…Many studies have examined brain activity using 18 F-fluorodeoxyglucose (FDG) positron emission tomography (PET) imaging to reveal this difference in brain plasticity. They showed that the cortices of individuals with cochlear implants who achieve successful levels of speech perception activate more areas than in those with normal hearing when listening to speech stimuli [10,11] . PET studies also show that the right secondary auditory and auditory association cortices are significantly activated in response to words, prose [12] , and…”

Section: Introductionmentioning

confidence: 99%

Factors Contributing to Speech Performance in Elderly Cochlear Implanted Patients: An FDG-PET Study: A Preliminary Study

et al. 2015

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OBJECTIVE:The purpose was to evaluate brain plasticity that contributes to speech performance after cochlear implantation (CI) in postlingual elderly (>60 years) patients. MATERIALS and METHODS:Fifteen elderly postlingual deaf patients who underwent preoperative brain fluorodeoxyglucose positron emission tomography (FDG-PET) and were followed-up for more than 1 year after CI were included. The mean age of these patients was 64.6 years (range, 60-80 years). Based on their sentence score at 1 year after CI surgery, the patients were classified into two groups: poor performers (CID score of <80) and good performers (CID score of ≥80). The duration of deafness, age at operation, preoperative residual hearing, and preoperative brain metabolism were analyzed. SPM5 software was used for FDG-PET image preprocessing and statistical analysis. RESULTS:Neither deafness duration nor preoperative residual hearing was associated with speech performance. The age at operation had little association with speech performance. Deaf patients whose brain metabolism was higher in frontotemporal regions became good CI users but those with higher metabolism in visual association areas became poor CI users. No significant cortical area of higher metabolism was associated with the duration of deafness. CONCLUSION:Overactivation in the visual processing pathway correlated with a poor CI outcome at 1 year. Deaf patients who are going to be poorer performers with CI devices maintain visual information processing during preoperative silent resting periods.

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“…8,13,19,24 Buna karşın bazı çalışmalarda ise MRG'nin implanta herhangi bir zarar vermediği belirtilmektedir. [52][53][54][55][56] Böyle bir durum karşısında kohlear implant cerrahisi geçiren hastanın implantı takan cerraha danışması uygun olacaktır. 8 Kohlear implantın dış parçasının sudan sakınılması gerektiği konusunda hasta ve yakınları bilgilendirilir.…”

Section: Taburculuk Eği̇ti̇mi̇unclassified

Responsibilities of Nurse in Cochlear Implant Surgery: Review

Altınbaş¹,

Korkmaz²,

Kirazlı³

2016

Turkiye Klinikleri J Nurs

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K ohlear implantlar; bilateral ileri veya çok ileri derecede sensörinö-ral işitme kaybı olan, işitme cihazından yeterince ya da hiç fayda göremeyen çocuk ve erişkinlere, sesleri daha iyi algılama ve konuş- A An na ah h t ta ar r K Ke e l li i m me e l le er r: : Kohlear implantlar; işitme kaybı; cerrahi; komplikasyonlar; hemşirelik bakımı A AB BS S T TR RA AC CT T A cochlear implant, is a very useful application on the partial recovery of hearing for individuals that have severe sensorineural hearingloss and have not benefit from hearing aids. Nowadays, cochlear implant has provided a new lifestyle to many hearing-impaired children and adults. Centers which are conducted cochlear implant which is currently 38 in our country and hundreds of cochlear implant practices are being implemented in these centers. Nurses have an important responsibility of providing improvements in patients undergoing cochlear implant surgery, prevention, early detection and management of complications which may be occured. Nurses have needed to educate themselves to be prepared for such technological surgery and to provide the care of patients with the best conditions. The number of medical publications and studies about the implementation of cochlear implant has been increased rapidly, and also in the literature, studies dealing with the nursing aspect of this issue have not been found. In this article, cochlear implant's technical specifications, selection of patients, the impact on quality of life, preoperative and postoperative care of cochlear implant patients with the surgical technique and possible complications are included. This study is expected to contribute to our colleagues working in these units which cochlear implant is implemented and planned to be implemented.

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Imaging Plasticity in Cochlear Implant Patients

Cited by 103 publications

References 53 publications

Functional Imaging of the Auditory System: The Use of Positron Emission Tomography

Functional Imaging of the Auditory System: The Use of Positron Emission Tomography

Factors Contributing to Speech Performance in Elderly Cochlear Implanted Patients: An FDG-PET Study: A Preliminary Study

Responsibilities of Nurse in Cochlear Implant Surgery: Review

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