Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Multi-disciplinary Studies | en_US |
| dc.creator | Cheung, Chi-hung Alex | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/3304 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | - |
| dc.rights | All rights reserved | en_US |
| dc.title | Simulation of brainstem auditory evoked potentials | en_US |
| dcterms.abstract | Volume conductor computation has been used intensively for solving bio-electric problems in nerve and muscle fiber study Recently the concept of Propagation Point Source Response (PPSR) is introduced which provide an analytical separation of the conducting nerve fiber characteristics from the bio-electric source. With this concept, the transfer function of a particular nerve system become the impulse response of it. This dissertation extend this approach into the human head model and simulate the auditory evoked potentials by computing the PPSR of the auditory pathway. First the human head is modelled as a sphere specified by equivalent radius and conductivity. The deviation from such model and the necessary adjustments are discussed. A coordinate system is also defined based on the traditional anatomical data. Nuclei along the auditory pathway will first be identified and located on the coordinate system. Then, by joining some of these nuclei with straight lines, the auditory pathway is approximated. Afterwards, the field equation of bio-electric properties of the auditory pathway in the human head model will be solved using spherical coordinates. From these analytical solution, the propagating point source response of the auditory pathway can be computed by 2D Fourier Transform technique. The defined auditory pathway are divided into 14 paths and the PPSR of each segment is computed individually. To form the overall response, these 14 paths are interconnected at the end-points (nucleus) after determination of synaptic delay of the nuclei, relative proportions of nerve fiber tracts and the possible asychronous firing time at nuclei. The factors affecting the accuracy of the human head model and the auditory pathway will be discussed Also, the computation efficiency and the resolution requirements for the mathematical calculation will be investigated as well. At last, a simple application of the simulated response is demostrated. | en_US |
| dcterms.extent | 88 leaves : ill. ; 29 cm | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 1998 | en_US |
| dcterms.educationalLevel | All Master | en_US |
| dcterms.educationalLevel | M.Sc. | en_US |
| dcterms.LCSH | Auditory evoked response -- Computer simulation | en_US |
| dcterms.LCSH | Auditory evoked response -- Mathematical models | en_US |
| dcterms.LCSH | Evoked potentials (Electrophysiology) | en_US |
| dcterms.LCSH | Auditory pathways | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.accessRights | restricted access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b14390942.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 4.28 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/3304