Multichannel techniques were used to assess the frequency specificity of activation in the central nucleus of the inferior colliculus (CIC) produced by electrical stimulation of localized regions within the ventral cochlear nucleus (VCN). Data were recorded in response to pure tones from 141 and 193 multiunit clusters in the rat VCN and the CIC, respectively. Of 141 VCN sites, 126 were individu...

The latency of the acoustic startle reflex in the rat is 8 msec, measured from tone onset to the beginning of the electromyographic response in the hindleg. This extremely short latency indicates that only a few synapses could be involved in some primary acoustic startle circuit. Acoustic startle is being used as a model system for studying habituation, sensitization, prepulse inhibition, class...

The present work was designed to study the influence of the stresses upon the inner ear. Guinea pigs were put in the state of stress by using electric stimulation (80V, 0.7sec., at 10sec. intervals) and light stimulation (electronic flash or electric bulb), and the influence of these stimulations upon the inner ear was observed. A) The susceptibility to acoustic trauma in animals was excited by...

Descending circuitry can modulate auditory processing, biasing sensitivity to particular stimulus parameters and locations. Using awake in vivo single unit recordings, this study tested whether electrical stimulation of the thalamus modulates auditory excitability and relative binaural sensitivity in neurons of the amphibian midbrain. In addition, by using electrical stimuli that were either lo...

Objective: The purpose of this study was to compare acoustic data for the following vocal parameters to assess vocal noise in dysphonic participant’s pre and post stimulability training: Relative Average Perturbations (RAP), Shimmer, and Noise-Harmonic Ratio (NHR) using the Multi-Dimensional Voice Program (MDVP) were assessed. The objective was to determine if stimulability training could impro...

The round window (RW) membrane provides pressure relief when the cochlea is excited by sound. Here, we report measurements of cochlear function from guinea pigs when the cochlea was stimulated at acoustic frequencies by movements of a miniature magnet which partially occluded the RW. Maximum cochlear sensitivity, corresponding to subnanometre magnet displacements at neural thresholds, was obser...

High-frequency sensorineural hearing impairments are among the most common configurations observed in the adult population. These impairments are more than often treated with acoustic amplification or cochlear implantation, both of which have benefits and pitfalls that need to be considered. This critical review will examine the effectiveness of ipsilaterally combined acoustic and electric hear...