رسالة جامعية
Neuronal processing of second-order stimuli in area 18 of the cat
| العنوان: | Neuronal processing of second-order stimuli in area 18 of the cat |
|---|---|
| المؤلفون: | Song, Yuning, 1977 |
| بيانات النشر: | McGill University, 2005. |
| سنة النشر: | 2005 |
| المجموعة: | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| مصطلحات موضوعية: | Biology, Neuroscience. |
| جغرافية الموضوع: | Doctor of Philosophy (Division of Neuroscience.) |
| الوصف: | Neurons in early visual cortex respond to luminance variations occurring at objects' boundaries. However, visual stimuli that are defined by non-luminance cues, such as texture or contrast, have been demonstrated to evoke neuronal responses in recent years. These stimuli have been termed as second-order stimuli, since they require more complex processing which involves essential nonlinear operations. In this thesis, I tested neuronal responses to various second-order stimuli in order to shed light on the underlying mechanisms. In particular, we addressed the following issues: (1) whether abutting gratings can be processed nonlinearly, as illusory contours formed by abutting lines; (2) Whether a single mechanism can mediate responses to two distinct second-order stimuli: abutting gratings and contrast envelopes; (3) whether cat A18 is a cortical locus for form-cue invariant boundary perception. Altogether, these results provide insight into higher order neuronal processing at early visual cortex and have some important indications for future studies. |
| Original Identifier: | oai:collectionscanada.gc.ca:QMM.102176 |
| نوع الوثيقة: | Electronic Thesis or Dissertation |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | alephsysno: 002326012; proquestno: AAINR25258; Theses scanned by UMI/ProQuest. |
| الإتاحة: | http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=102176Test |
| حقوق: | © Yuning Song, 2005 |
| رقم الانضمام: | edsndl.LACETR.oai.collectionscanada.gc.ca.QMM.102176 |
| قاعدة البيانات: | Networked Digital Library of Theses & Dissertations |
| الوصف غير متاح. |