|
DRUM >
Theses and Dissertations from UM >
UM Theses and Dissertations >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/1903/3489
|
| Title: | Auditory edge detection: the dynamics of the construction of auditory perceptual representations |
| Authors: | Chait, Maria |
| Advisors: | Poeppel, David
Simon, Jonathan Z |
| Department/Program: | Neuroscience and Cognitive Science |
| Type: | Dissertation |
| Sponsors: | Digital Repository at the University of Maryland
University of Maryland (College Park, Md.) |
| Keywords: | Biology, Neuroscience (0317)
Psychology, Cognitive (0633)
MEG; Auditory cortex; perception; binaural processing; change detection; |
| Issue Date: | 27-Apr-2006 |
| Abstract: | This dissertation investigates aspects of auditory scene analysis such as the detection of a new object in the environment. Specifically I try to learn about these processes by studying the temporal dynamics of magnetic signals recorded from outside the scalp of human listeners, and comparing these dynamics with psychophysical measures. In total nine behavioral and Magneto-encephalography (MEG) brain-imaging experiments are reported. These studies relate to the extraction of tonal targets from background noise and the detection of change within ongoing sounds. The MEG deflections we observe between 50-200 ms post transition reflect the first stages of perceptual organization. I interpret the temporal dynamics of these responses in terms of activation of cortical systems that participate in the detection of acoustic events and the discrimination of targets from backgrounds. The data shed light on the statistical heuristics with which our brains sample, represent, and detect changes in... |
| URI: | http://hdl.handle.net/1903/3489 |
| Appears in Collections: | Biology Theses and Dissertations
UM Theses and Dissertations
|
Files in This Item:
| File |
Description |
Size | Format | No. of Downloads |
|---|
| umi-umd-3318.pdf | | 3386Kb | Adobe PDF | 712 | View/Open |
|
Show full item record
All items in DRUM are protected by copyright, with all rights reserved.
|
