NDLI: Cochlear implant-evoked cortical activation in children with cochlear nerve deficiency.

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Cochlear implant-evoked cortical activation in children with cochlear nerve deficiency.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	He, Shuman Grose, John Hang, Anna X. Buchman, Craig A.
Description	Country affiliation: United States Author Affiliation: He S ( Department of Otolaryngology-Head and Neck Surgery, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-7600, USA.)
Abstract	OBJECTIVE: To report the results of cochlear implant-elicited cortical auditory evoked potentials (eCAEP) in children with cochlear nerve deficiency (CND). STUDY DESIGN: Case control series. SETTING: Tertiary academic referral center. PATIENTS: Seven children with CND that have a cochlear implant in their affected ear. Four children without CND served as controls. INTERVENTION(S): eCAEPs were elicited by activation of individual cochlear implant electrodes. MAIN OUTCOME MEASURE(S): Onset responses (P1-N1-P2 complex). RESULTS: Three of 7 CND children demonstrated eCAEP responses across a broad range of electrodes despite having limited or no open set speech perception abilities using their implants. Two of these children had eCAEPs that were characterized by substantial variability in latency, amplitude, and number of electrodes with identifiable responses. The remaining 4 ears with CND and poor speech perception had multiphasic responses that are inconsistent with eCAEPs. Non-CND ears with excellent speech perception abilities demonstrated robust responses on all electrodes stimulated. CONCLUSION: Abent eCAEP responses were indicative of poor open-set speech perception skills in all cases. However, eCAEP onset responses were measurable in some children with imaging evidence of CND, indicating probable cochlear nerve hypoplasia rather than aplasia. That some children with CND and poor speech perception had robust eCAEPs in some instances makes this particular measure of limited use for predicting good speech perception outcomes after cochlear implantation in these children. The origin of multiphasic responses remains to be determined but may be of somatosensory origin in some instances.
File Format	HTM / HTML
ISSN	15317129
e-ISSN	15374505
DOI	10.1097/MAO.0b013e31826426d2
Journal	Otology & Neurotology
Issue Number	7
Volume Number	33
Language	English
Publisher	Lippincott Williams & Wilkins
Publisher Date	2012-09-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't Vestibulocochlear Nerve Diseases Audiometry Discipline Otolaryngology Child, Preschool Electroencephalography Auditory Cortex Hearing Loss, Sensorineural Physiopathology Evoked Potentials, Auditory Case-control Studies Adolescent Physiology Cochlear Implants Speech Perception
Content Type	Text
Resource Type	Article
Subject	Otorhinolaryngology Sensory Systems Neurology (clinical)

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