INTRODUCTION The aim of this research was to describe nomograms of brainstem auditory evoked potentials, oscillating stimulation of the vestibular organs and ultrastructural research methodology of a spiral organ of guinea-pigs. MATERIALS AND METHODS For the experimental purposes 60 guinea-pigs of both sexes, weight 250-300 grams, were used as research materials. After general anesthesia with...

Objectives: The result of auditory brainstem response is used worldwide for detecting hearing impairments or hearing aids. This study aimed to introduce the superiority of mathematical innovation algorithm toward subjective evaluation by an audiologist. The automatic algorithm method is encouraged for detecting the waves of Auditory Brainstem Response (ABR), because it can reduce subjective eva...

Background The aim was to electrophysiologically evaluate changes in the peripheral and central auditory systems individuals with neurofibromatosis type 1 who underwent formal training. Material methods sample consisted of 6 aged between 9 15 years. procedures involved anamnesis, meatoscopy, brainstem potentials long-latency evoked potentials, behavioral tests processing. All were given weekly ...

Auditory evoked potentials acquired with frequency-specific stimuli are useful in estimating hearing sensitivity in difficult-to-test patients. Stimulus characteristics, test methods, strengths, and limitations of the auditory brainstem response, SN10 response, middle latency response, and 40-Hz response are reviewed. Clinical strategies using frequency-specific stimuli are suggested for the ev...

BACKGROUND Middle and late latency auditory evoked potentials. AIM to verify the occurrence of middle and late latency auditory evoked potentials disorders in adults with Acquired Immunodeficiency Syndrome (AIDS). METHOD Middle and late latency auditory evoked potentials of 8 individuals with AIDS, with ages ranging from 10 to 51 years, with normal hearing, or with sensoryneural hearing los...

OBJECTIVE As the need for objective measures with cochlear implant users increases, it is critical to understand how electrical potentials behave when stimulus parameters are systematically varied. The purpose of this study was to record and evaluate the effects of implanted electrode site and stimulus current level on latency, amplitude, and threshold measures of electrically evoked auditory p...

Auditory evoked potential responses were recorded in 20 chronic malnourished children in age group 3-6 years and in 20 healthy age and sex matched controls using an 5200 Neuropack plus ( Nihon Koden, Japan) evoked potential recorder. The absolute peak latencies, inter peak latencies and amplitude of waves I-V of brainstem auditory evoked potentials (BAEPs) were analyzed. The mid latency respons...

The electrophysiological characteristics of demyelinated axons are sensitive to changes in plasma calcium concentration. This study investigated the effect of verapamil, a calcium antagonist drug, on brainstem auditory, visual, and somatosensory evoked potentials in multiple sclerosis patients. Eight clinically stable patients with abnormal visual and/or brainstem auditory evoked potentials and...