The Effect of Delayed Auditory Feedback on Activity in the Temporal Lobe While Speaking: A Positron Emission Tomography Study
Takaso, H., Eisner, F., Wise, R. S., & Scott, S. K. (2010). The Effect of Delayed Auditory Feedback on Activity in the Temporal Lobe While Speaking: A Positron Emission Tomography Study. Journal Of Speech, Language & Hearing Research, 53(2), 226-236
I chose this article because I found that it was interesting to learn more about how auditory feedback affects areas of the brain. In the study conducted in this article they wanted to figure out where the neural basis was for the detection and compensation for the delay of auditory feedback. They also wanted to figure out the effects that increase the duration of the delay of auditory feedback (DAF). Previous research has led to the notion that neural responses to a person’s own voice and responses to the voice of others are different. More specifically in their voice the auditory cortex shows response, but in the voice of another person the responses in the auditory cortex are suppressed. In this study they had eight English speaking participants that underwent PET scan testing to look at regional cerebral blood flow across four different delayed conditions. They first tested them to ensure their ability to speak under DAF, and then they tested them at four different delay times 0ms, 50ms, 125ms, and 200ms. The stimuli they selected were pages from a children’s book so it would be simple to read. In this study they found that there was activation in the bilateral superior temporal lobe that extends to the posterior medial auditory areas due to the DAF. The participants showed difficulty in the accuracy of articulation and timing with the increase of the delay. As the amount of delay increased there were peaks in the temporal lobe and there were also peaks between the temporal and parietal junction in the amount of delay but not in the presence of delay. In this study the concluded that there were differences in the neural responses when hearing one’s own voice at a delay and also detected differences in the neural responses with a delay. All of the peaks they found were influenced by the amount of delay. Their results confirmed the role for the posterior sensory motor system when producing speech under the conditions of DAF. I feel like this study is very informative about the brain areas associated with changes in the auditory cortex and the brain areas problem with it can affect.
Audrey:
ReplyDeleteDid you submit this as a topic for the language chapter?
Denise