Cochlear fistula in the chronic otitis media (COM) without cholesteatoma is an extremely rare with only a few cases reported in the literature to this date. We describe a case of cochlear fistula observed in a female with COM without cholesteatoma. This report presents the first clinical case of a transtympanic iatrogenic trauma by habitual cotton swabs probably causing cochlear fistula.

The primary objective of this study was to document the benefits and possible detriments of combining ipsilateral acoustic hearing in the cochlear implant ear of a patient with preserved low frequency residual hearing post cochlear implantation. The secondary aim was to examine the efficacy of various cochlear implant mapping and hearing aid fitting strategies in relation to electro-acoustic be...

| Cochlear implants has been very successful in restoring partial hearing to profoundly deaf people. The success of cochlear implants can be attributed to the combined e orts of scientists from various disciplines including bioengineering, speech science and signal processing. This paper will present an overview of various signal processing techniques that have been used for cochlear prosthesis...

Over the past two decades, cochlear implantation has become a widely accepted treatment of deafness in children. Over 20,000 children have received cochlear implants worldwide. Hearing, language and social development outcomes have been positive. We review current issues in cochlear implantation, candidacy, evaluation, surgery, habilitation, ethics and outcomes.

The neuroanatomy of the auditory system is well established (Brodal, 1998). Input to the brainstem comes through VIII cranial nerve. First station is cochlear nucleus. From the cochlear nucleus, auditory information is split in two. Some nerve fibers going to the ventral cochlear nucleus synapse on their target cells with giant, hand-like terminals. This serves as timing of the signal. The vent...

Endogenous norepinephrine was quantitatively measured in cochlear tissues of pigmented and nonpigmented animals by high-performance liquid chromatography and electrochemical detection. Epinephrine, dopamine and serotonin were not detected. The cochlear norepinephrine content of the pigmented animals was found to be more than double that present in corresponding albinos. Cochlear norepinephrine ...

OBJECTIVE We report an extremely rare case of pneumocephalus after cochlear implantation. METHOD Case report and a review of the world literature on pneumocephalus after cochlear implantation. RESULTS We present a case of uneventful cochlear implantation in a patient with nasal polyposis. Post-operative nose blowing resulted in subcutaneous emphysema pneumocephale presenting five weeks post...

In this investigation, we report on 4 patients affected by incomplete partition type I submitted to cochlear implant at our institutions. Preoperative, surgical, mapping and follow-up issues as well as results in cases with this complex malformation are described. The cases reported in the present study confirm that cochlear implantation in patients with incomplete partition type I may be chall...

PURPOSE To describe a technique to obtain guinea pigs cochlear fluids and measure nitric oxide (NO) concentration. METHODS Six guinea pigs were used and sacrificed. The cochlear fluids collected for measurement of NO, performed by chemiluminescence (NOA 280). RESULTS Through the chemiluminescence was possible to analyze the concentration of NO in cochlear fluids obtained. Average levels of ...

The emergence of hyperactivity in the form of elevated spontaneous firing rates after cochlear trauma has been well documented in a number of central auditory structures, including the auditory cortex, inferior colliculus, and dorsal subdivision of the cochlear nucleus. This hyperactivity is of interest as a possible neural substrate of tinnitus. Whether the ventral subdivision of the cochlear ...