CORTICAL AUDITORY EVOKED POTENTIALS IN TWO PRELINGUALLY DEAFENED ADULTS
Journal Title: Journal of Hearing Science - Year 2015, Vol 5, Issue 1
Abstract
Background: It has been reported that in prelingually deafened adults there is maturation of the late latency response (LLR) after rehabilitation using cochlear implants. Other evidence suggests that the auditory system, like any other sensory system, receives multimodal stimulation, a factor which could help the auditory system mature even in the absence of any auditory input. The current study was done on two prelingually deaf adults who had not received rehabilitation, and their latencies were within the normal mature range, suggesting their auditory cortex responses were maturely developed prior to rehabilitation. Materials and methods: Two male participants took part in the study: one was 21 years old and the other was 36, and both had congenital profound hearing loss. Using pure tone thresholds obtained earlier, a strong class hearing aid (Siemens Infiniti Pro SP) was programmed using NOAH software and fitted to the right ear using the NALNL-1 fitting formula. As an objective measure of verification of hearing aid effect, auditory P1, N1, P2, and N2 were recorded using the free-field facility available in the IHS SmartEP system: a 1000 Hz pure tone was presented at 70 dB SPL (30 dB SL) and 50 dB SPL (10 dB SL) from a loudspeaker at a distance of 1 m and 45° angle. Results: The latencies of P1, N1, P2, and N2 for both participants were recorded for 70 and 90 dB HL; all latencies were well within normal limits. Conclusions: The results indicate that, with adequate amplification, a mature response from the auditory cortex can be obtained even in adults who have profound hearing loss and who have been deprived of auditory stimuli since a prelingual age.
Authors and Affiliations
Aju Abraham, Hari Prakash, Bellur Rajashekhar, Krishna Yerraguntla
Keywords
Related Articles
- EP ID EP169179
- DOI -
- Views 57
- Downloads 0
REPORT ON THE 19TH BFE EUROPEAN CONFERENCE ON NEUROTHERAPIES, 8–12 JUNE 2016, MADRID, SPAIN
The 19th BFE (Biofeedback Federation of Europe) European Conference on Neurotherapies took place at Madrid, Spain, on 8–12 June 2016. As with every BFE conference, the main theme was the use of different kinds of biofee...
RESULTS OF COCHLEAR IMPLANTATION IN CHILDREN WITH CONGENITAL CYTOMEGALOVIRUS INFECTION VERSUS GJB2 MUTATION
Background: Children with congenital cytomegalovirus (CMV) infection face a bigger risk of neurological deficits and developmental delays associated with sensorineural hearing loss (SNHL). Their rehabilitation with a coc...
THE 3RD INTERNATIONAL SYMPOSIUM ON OT OSCLEROSIS AND STAPES SURGERY, WITH PARTICIPATION OF REPRESENTATIVES OF THE WORLD HEARING CENTER
.
TEMPORAL PROCESSING IN MUSICIANS AND NON-MUSICIANS
Background: Temporal processing abilities are important for speech perception, and they are generally superior in musicians than in non-musicians. Since there are many different training methods used to develop musical e...
BALANCE PROBLEMS IN DOWN SYNDROME CHILDREN: VARIOUS SENSORY ELEMENTS AND CONTRIBUTION TO MIDDLE EAR PROBLEMS
Background: Down syndrome (DS) is one of the commonest causes of developmental delay in children, with equilibrium problems being an integral part of the syndrome. This leads to further impairment of cognitive and concen...