Abstract
Interaction between auditory and phonatory systems was explored in normal speakers by comparing laryngeal reaction time (LRT) with interpeak intervals from the auditory brainstem response (ABR) obtained using high and low stimulus presentation rates. Thirty-four subjects with no history of neurological or speech-language disorders and normal hearing sensitivity participated. Interpeak intervals were derived from ABR's recorded for each ear at rates of 21.1 and 91.1 clicks/s. LRT responses were obtained by instructing subjects to sustain an /s/ and then phonate an /a/ as fast as possible following visual cues. Two measures of reaction time performance were derived, Mean Laryngeal Reaction Time (MLRT) and Best Laryngeal Reaction Time (BLRT). Linear regression analyses were completed between each measure of reaction time performance and each ABR interpeak interval. Using either LRT measure, two significant (p less than .05) positive linear relationships were found. One involved the interpeak interval between Waves III and V and the other involved the interpeak interval between Waves I and V. Both were recorded at high stimulus presentation rates. These results support the small body of literature from normal speakers, stutterers, and spasmodic dysphonics suggesting interaction between the auditory and phonatory systems at the brainstem level.
Published Version
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