American Journal of Audiology Vol.20 171-180 December 2011. doi:10.1044/1059-0889(2011/10-0036)
© American Speech-Language-Hearing Association
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Cortical High-Gamma Responses in Auditory Processing

Mackenzie C. Cervenkaa, Stephanie Nagleb and Dana Boatman-Reicha

a Johns Hopkins School of Medicine, Baltimore, MD
b Towson University, Towson, MD

Correspondence to Dana Boatman-Reich: dboatma{at}jhmi.edu

Purpose: This tutorial provides an introduction to cortical auditory spectral responses, focusing on event-related activity in the high-gamma frequencies (60–150 Hz), their recent emergence in neuroscience research, and potential clinical applications.

Method: Auditory high-gamma responses are described and compared with traditional cortical evoked responses, including the auditory evoked N1 response. Methods for acquiring and analyzing spectral responses, including time-frequency analyses, are discussed and contrasted with more familiar time-domain averaging approaches. Four cases are presented illustrating high-gamma response patterns associated with normal and impaired auditory processing.

Conclusions: Cortical auditory high-gamma responses may provide a useful clinical measure of auditory processing.

Key Words: high-gamma responses, auditory processing, time-frequency analysis, auditory cortex


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