This thesis used the electroencephalogram (EEG) to measure the
electrophysiological correlates of auditory distraction. Chapter One determined that
relative to broad-band noise, the presence of a continuous speech signal impaired
task performance, attenuated the N1 peak and reduced theta/alpha band inter-trial
phase coherence around the latency of the N1. Chapter Two found that reductions
of inter-trial phase coherence during distraction were related to both disruptions of
gain and the temporal fidelity of evoked responses. Chapter Three found that postsecondary
adults with ADHD are not characterized by greater levels of distraction
and that this population may be responding to sensory events with abnormally high
phase locking. Chapter Three also found that Un-medicated ADHD adults had
significantly more N1 latency, theta/alpha band evoked power than Medicated
ADHD or Control groups. These results extend the literature on distraction by using
time-frequency measures to assess how distraction modulates early sensory
processing of stimulus events. / xxii, 171 p. : col. ill. ; 29 cm
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:ALU.w.uleth.ca/dspace#10133/3374 |
| Date | January 2013 |
| Creators | Ponjavic, Karla D |
| Contributors | Tata, Matthew, Piquette, Noella |
| Publisher | Lethbridge, Alta. : University of Lethbridge, Dept. of Neuroscience, c2013, Arts and Science, Department of Neuroscience |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | en_CA |
| Detected Language | English |
| Type | Thesis |
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