Effects of Delayed Auditory Feedback on the Bereitschaftspotential

This study examined the brain electrical activity of normal speakers in a non-delayed auditory feedback (DAF) condition and when experiencing DAF to determine the effect DAF would have on the Bereitschaftspotential (BP). The BP reflects the preparatory state of a person prior to motor execution of an act and can be observed 1500 to 500 ms prior to voluntary movement. The participants in the study included 10 adults with normal speech. Each read a series of 30 sentences, both without DAF and with DAF, while the BP was measured. Results indicate that the BP is present across the scalp in both the control condition and the DAF condition; however, the BP is reduced in the DAF condition. The scalp distribution maps indicate an increased negativity in the left frontal lobe in the DAF condition. These findings suggest that while the brain is engaged in processing current information that has already been initiated, the motor system may not be able to be primed for the next sequential motor event. There is still a need for more research to explore the motor control of speech and the ways altered feedback may disrupt the speech motor control.

Name thesis:degree_name

MS

Grantor dc:publisher

Brigham Young University - Provo

Author dc:creator

• Johnson, Jennifer L.

• speech
• Bereitschaftspotential
• Delayed Auditory Feedback
• brain electrical activity
• motor potentials
• Communication Sciences and Disorders

Language dc:language

English

Repository record dc:identifier

https://scholarsarchive.byu.edu/etd/1239

OAI identifier oai:identifier

oai:scholarsarchive.byu.edu:etd-2238