BACKGROUND AND PURPOSE Our purpose was to determine the frequency of abnormal findings on contrast-enhanced high-resolution MR imaging studies in patients with sudden hearing loss. METHODS Seventy-eight consecutive patients with sudden hearing loss underwent contrast-enhanced MR imaging of the temporal bone, cerebellopontine angle, and brain. Additional tests included audiologic examination, ...

  Electrocochleography (ECoG) records the electrophysiologic activity of the most peripheral part of the auditory system, the inner ear cochlea and the 8th nerve. Auditory evoked potentials being recorded are Cochlear Microphonic (CM) and Summating Potential (AP). In order to provide the proper background for laboratory research and introducing an ECoG curve of a model animal, it was decided to...