Investigating the Role of Cortical Inhibition in Tinnitus

Subjective tinnitus is characterized as the perception of a phantom sound with no external acoustic source, and is often described as a “ringing in the ears” sensation. While evidence supports a central origin for tinnitus, the underlying neural mechanisms for this condition remain elusive. The studies presented in this thesis offer significant contributions to understanding the neural basis of tinnitus by (1) validating a behavioural paradigm that can successfully screen rats for transient noise-induced tinnitus without any indications of false-positives, and (2) demonstrating that a local loss of inhibition is sufficient to induce gain enhancement in the primary auditory cortex, as well as tinnitus-positive behaviour - evidence that supports the central gain model, one of the leading hypotheses of tinnitus generation. Overall, these findings help provide more effective strategies to directly investigate putative mechanisms of tinnitus, and furthermore expand our current understanding of this distressing condition

Protocol for the Provision of Amplification v 2023.01

This Protocol addresses the provision of amplification (hereafter: \u27Amplification\u27) to infants and children who are receiving services from the Ontario Infant Hearing Program (IHP). For the purposes of this protocol, providing amplification includes the processes of prescribing a hearing aid (air or bone conduction) and/or other hearing assistance technologies based on appropriate assessment information, verification that the specified acoustical performance targets have been achieved, fitting the device on the child, and ongoing evaluation of device effectiveness in daily life. Amplification within the IHP does not include the provision of cochlear implants