Cochlear Potentials in the Kangaroo Rat

Ultraviolet Communication in the Kangaroo Rat (Dipodomys ordii)

Dendritic Ca2+ transients evoked by action potentials in rat dorsal cochlear nucleus pyramidal and cartwheel neurons.

Simultaneous fluorescence imaging and electrophysiologic recordings were used to investigate the Ca(2+) influx initiated by action potentials (APs) into dorsal cochlear nucleus (DCN) pyramidal cell (PC) and cartwheel cell (CWC) dendrites. Local application of Cd(2+) blocked Ca(2+) transients in PC and CWC dendrites, demonstrating that the Ca(2+) influx was initiated by dendritic Ca(2+) channels...

The Antioxidant Effect of Curcumin on Cochlear Fibroblasts in Rat Models of Diabetes Mellitus

Introduction: The aim of this study was to investigate the potential of curcumin as an antioxidant to increase the expression of superoxide dismutase (SOD) in fibroblasts of the cochlear lateral wall in rat models of diabetes mellitus. Materials and Methods: Twenty-four male Wistar rats Rattus norvegicus were randomly divided into six groups: group 1 as the control group; group 2 as the diabeti...

Cochlear Potentials in the Rhesus and Squirrel Monkey

The cochlear potentials were studied in rhesus and squirrel monkeys. Contrary to previous reports, the data revealed no important differences between the results obtained in these animals and those reported for the cat and guinea pig. Round-window recording of responses to sound stimuli exhibited cochlear mi­ crophonics of nearly 2 mV at maximum. The input-output curves showed that CM of these ...

The Cochlear Implant

The studies on cochlear implants have been conducted in the United States, Austria, Brasil, France, Finland, and some other countries. Up to now, this technique does not seem to have a wide spread application. Indeed it can only apply cases of deafness still presenting sufficient neural remnants to transmit the message. Moreover, the patient must be totally deaf( quasi­ complete loss of har cel...