OBJECTIVE To investigate whether the saccule exhibits temporary or permanent functional loss resembling threshold shifts in auditory brainstem response (ABR) of guinea pigs following noise exposure. DESIGN Randomly bred guinea pigs were divided into 3 groups: A (short-term noise exposure, 30 minutes, n = 15), B (long-term noise exposure, 40 hours, n = 9), and C (no noise exposure, n = 5). S...

We classified the results of preoperative auditory brainstem response (ABR) in 121 patients with useful hearing and considered the utility of preoperative ABR as a preliminary assessment for intraoperative monitoring. Wave V was confirmed in 113 patients and was not confirmed in 8 patients. Intraoperative ABR could not detect wave V in these 8 patients. The 8 patients without wave V were classi...

In recent years there has been a strong interest in transmitting compressed Video over ATM. Previous work has dealt with transmitting MPEG over CBR and VBR services of ATM. The ABR service of ATM is expected to be much more cost eeective than CBR or VBR. There has been a limited amount of work done in transmitting video over ABR. However, there hasn't been much work done on running client/serve...

Under adequate stimulus intensities, the power spectra of normal auditory evoked brainstem responses (ABR) are mainly composed of three major parts, i.e. component A (0 approximately 350Hz), B (350-700Hz). and C (700-1200Hz). By means of digital filter using fast Fourier transform, three derived ABR waveforms consist of each component of the power spectrum were obtained and named component wave...

UNLABELLED The most important for the diagnosis of vestibular schwannoma is MRI technic, which allows assessing its size and shape. The gold diagnostic standard includes also PTA, SD and ABR, nystagmography with calorics and VEMP. Nystagmography with calorics reflects the status of superior vestibular nerve. The sensitivity of calorics amounts to 61-87%. VEMPs reflect the status of interior ves...

OBJECTIVE This in situ study evaluated the protective effect of green tea on dentin erosion (ERO) and erosion-abrasion (ABR). MATERIAL AND METHODS Ten volunteers wore intraoral palatal appliances with bovine dentin specimens subjected to ERO or ERO + toothbrushing abrasion performed immediately (ERO+I-ABR) or 30 min after erosion (ERO+30-min-ABR). During 2 experimental 5-day crossover phases,...

The purpose of this retrospective study is to present the clinical experience of a single institution on the recovery of ABR thresholds in a large population of neonates and infants at risk of hearing loss. Potential prognostic factors associated with this phenomenon were also investigated. Out of 2248 high risk infants, 384 had abnormal ABR at initial hearing evaluation and 168 of them had abs...

The IEEE working group is currently standardizing a new media access control MAC protocol for the emerging Hybrid Fiber Coax HFC networks Crucial for the success of will be its ability to support Quality of Service QoS for delay and throughput sensitive applications such as multimedia Two methods are presented in this thesis to provide QoS e cient interoperability with Asynchronous Transfer Mod...

The neuromodulator serotonin is found throughout the auditory system from the cochlea to the cortex. Although effects of serotonin have been reported at the level of single neurons in many brainstem nuclei, how these effects correspond to more integrated measures of auditory processing has not been well-explored. In the present study, we aimed to characterize the effects of serotonin on far-fie...

This paper examines congestion control mechanisms for ABR (Available Bit Rate) traac in ATM networks. ABR service is deened in ATM standards to support applications which can share the excess network capacity dynamically by adjusting their data transmission rates based on the available resources in the network. ABR traac sources respond to feedback from the network. Feedback information can be ...