Hearing loss is hidden disability and second most common congenital pathology. Prevention, early identification and early intervention of hearing loss can prevent further disability in development of speech, language, cognition and other developmental domains. The prevalence of congenital hearing loss has been estimated to be 1.2-5.7 per thousand in neonates. In these contexts, the aim of study was to determine outcomes of neonates hearing screening program in Hospital. It is a clinical cross-sectional study which was conducted in tertiary care centre from 8th July, 2015 to 31th May, 2016. Total no of 2254 cases were screened. Details case history including high risk register, Pediatric Audiometry, Otoacoustic Emission tests were performed followed brainstem evoked response audiometry. The Prevalence of hearing loss among high risk babies confirmation by BERA was 8.8% per 1000 babies and 16 cases were recommended for Cochlear Implant. The screening protocol with objective test i.e. Distortion Product Otoacoustic Emission and confirmation by Brainstem Evoked Response Audiometry is very useful tool in early identification of congenital hearing loss in neonates. Hence, the results of this study will be used to initiate universal newborn hearing screening in other hospitals. Moreover, this study highlights the relevance of neonatal hearing screening in other states of India and country where this screening is not performed routinely in all hospitals and creating awareness to identify neonatal risk factors associated with hearing loss and understand the importance of early identification and early intervention and among health care professionals.
Objective Frequency tuning of ocular vestibular evoked myogenic potential (oVEMP), which is the stimulus frequency corresponding to the largest oVEMP amplitude, has been used to diagnose cases with Ménière's disease and differentiate them from cases with benign paroxysmal positional vertigo with a high degree of sensitivity and specificity. However, this measure of oVEMP is carved out of the peak-to-peak amplitude of oVEMP, and studies on test–retest reliability of amplitude of oVEMP have shown moderate-to-excellent reliability of amplitude. This would theoretically render the frequency tuning of oVEMP susceptible to variations across multiple recordings. This being the case, erroneous conclusions regarding the presence of Ménière's disease could be made if the frequency tuning varies between recordings. However, there is no published report regarding the test–retest reliability of frequency tuning measure of oVEMP even in healthy individuals, to the best of our knowledge. Therefore, this study aimed to study the test–retest reliability of frequency tuning of oVEMP in healthy individuals. Method The study included 20 healthy adults in the age range of 18–25 years. All participants underwent oVEMP recording in 4 different sessions, with each session consisting of oVEMP recording for octave and midoctave tone-burst frequencies from 250 to 2000 Hz. Results The results revealed no significant difference in frequency tuning of oVEMP among the sessions ( p > .05). The intraclass correlation coefficient for frequency tuning data was found to be .857. Conclusion The frequency tuning of oVEMP has excellent test–retest reliability and therefore lends itself to applications requiring multiple sessions of recording.
Background The menstrual cycle is a cyclic fluctuation of ovarian hormonal level in every female. Previous electrophysiological, psychoacoustic, neurobiological and cognitive neuroscience studies have focused on the fluctuating level of gonadal steroids (oestradiol and progesterone) affecting peripheral auditory system and cognitive function. These changes can alter central auditory processing abilities and auditory working memory capacity during the menstrual cycle. In the present study the effect of hormonal changes in temporal processing, speech perception in noise and working memory is assessed in females. Study design A time-series design was used. A total of 10 female participants in the age range of 18–25 years, with an average 28 days regular menstrual cycle, were included in this study. Auditory temporal processing abilities were assessed using gap detection, modulation detection and a duration discrimination test; speech perception in noise was assessed through the Quick-SIN test in Kannada and auditory working memory was assessed using a forward and backward digit span test. All participants were tested twice during a single menstrual cycle, i.e. menstrual phase, and ovulation. A paired sample t-test was used to estimate the significance of differences. Results The results showed significant differences for all the tests across the two phases of the menstrual cycle; the ovulation phase had better thresholds compared to that of the menstrual phase for all tests. Conclusion These findings suggest that higher oestrogen level fine tunes central auditory processing and improves psychoacoustic capabilities to resolve temporal waveform, which is important for speech perception.
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