Electrocochleography (ECochG) measures inner ear potentials generated in response to acoustic stimulation of the ear. These reflect residual function cochlea. In cochlear implant candidates with hearing, electrode can directly measure ECochG responses during implantation process. Various authors have described ability monitor by continuous measurements surgery. The measurement signals surgery i...

The use of tone-burst stimuli for electrocochleography (ECochG) may offer certain advantages over conventional broad-band clicks. Namely, the summating potential (SP) component can be examined at different frequencies and may be easier to define and measure. To apply these findings clinically, it would first be necessary to establish SP amplitudes as a function of tone-burst frequency in normal...

This critical review examines literature that has addressed the question: Are there successful predictors of cochlear implant outcomes in children with auditory neuropathy spectrum disorder (ANSD)? Through a search of the current literature, four studies were included for critical analysis. Study designs included one nonrandomized retrospective cohort study, one nonrandomized longitudinal cohor...

Auditory neuropathy spectrum disorder (ANSD) is characterized by an apparent discrepancy between measures of cochlear and neural function based on auditory brainstem response (ABR) testing. Clinical indicators of ANSD are a present cochlear microphonic (CM) with small or absent wave V. Many identified ANSD patients have speech impairment severe enough that cochlear implantation (CI) is indicate...

Although, cochlear implants (CI) traditionally have been used to treat individuals with bilateral profound sensorineural hearing loss, a recent trend is to implant individuals with residual low-frequency hearing. Notably, many of these individuals demonstrate an air-bone gap (ABG) in low-frequency, pure-tone thresholds following implantation. An ABG is the difference between audiometric thresho...

The goal of this study was to describe the contribution of outer hair cells (OHCs) and the auditory nerve (AN) to speech understanding in quiet and in the presence of background noise. Fifty-three human subjects with hearing ranging from normal to moderate sensorineural hearing loss were assayed for both speech in quiet (Word Recognition) and speech in noise (QuickSIN test) performance. Their s...

background and aim: vestibular migraine is a type of migraine that causes vertigo, dizziness, and imbalance in addition to typical migraine symptoms. in this study, we aimed to investigate vestibular system in these patients by videonystagmography (vng), electrocochleography (ecochg), and vestibular evoked myogenic potential (vemp) testing. methods: this empirical study was conducted on 10 pati...

Cochlear synaptopathy is the loss of synapses between inner hair cells and auditory nerve despite survival sensory cells. The findings extensive cochlear in animals after moderate noise exposures challenged long-held view that are elements most sensitive to insults lead hearing loss. However, has been difficult identify humans. We applied novel algorithms determine cell neural contributions ele...