Thesis (M. Res.(Med.))--University of Hong Kong, 2008. / Includes bibliographical references (p. 91-117)

Thesis (Ph. D.)--Catholic University of America. / Vita auctoris. Descriptive letterpress on versos facing the plates. Bibliography: p. 30-31.

Thesis (M.S.)--Eastern Illinois University, 2009. / Includes bibliographical references (leaves 80-84).

Thesis (Ph. D.)--Catholic University of America. / Vita auctoris. Descriptive letterpress on versos facing the plates. Bibliography: p. 30-31.

Thesis (Ph. D.)--University of Virginia, 1997. / Includes bibliographical references (106-124). Also available online through Digital Dissertations.

Thesis (Ph. D.)--University of Chicago. / Reprinted from the Journal of comparative neurology and psychology, Volume 20, No. 2, 1910. Includes bibliographical references (p. 115-118) Also available on the Internet.

Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 155-165).

Thesis (Ph. D.)--University of Virginia, 2001. / Spine title: Cell death in olfactory development. Includes bibliographical references (leaves 124-151). Also available online through Digital Dissertations.

The electrical activity of the olfactory bulbs of many vertebrates is characterized by large amplitude regular bursts of waves. These waves, known as induced waves, appear with each inspiration of odourous air through the nostrils. The work described in this thesis establishes that the induced waves are detectable in a variety of species investigated, from amphibia to mammalia. The occurrence of the waves under similar experimental conditions leads to the conclusion that the mechanism of their genesis is similar in all animals. The group activity of the neurones in the various layers of the olfactory bulb was studied together with the amplitude of the induced wave signal. It was found that most cellular activity occurred in the external plexiform and mitral cell layers whereas the maximum of the induced wave activity was in the granular layer. A peak of cellular activity was observed in the external plexiform and mitral cell layers with both nostrils occluded. On opening the ipsilateral nostril the cellular activity was enhanced in these same layers and on opening the contralateral nostril it was decreased. With strong olfactory stimulation an increase in the cellular activity in the granule cell layer was observed. Recordings from single olfactory neurones were made and whereas these were easily observed in the external plexiform and mitral cell layers they were found only rarely in the granule cell layer. It is proposed that the granule cell layer is the site of integration of the inhibitory influence from the contralateral olfactory bulb and from higher centres of the brain. It is further postulated that the cells in the granule cell layer do not normally generate action potentials but that they are capable of doing so with strong olfactory stimulation. It is thought that these cells are the site of genesis of the induced wave activity which is probably generated at the dendrodendritic synaptic connections with the secondary neurones. Evidence in favour of these dendrodendritic synapses being the normal pathway between the mitral and granule cells is presented. / Medicine, Faculty of / Cellular and Physiological Sciences, Department of / Graduate

The functional impacts of olfactory rosette variation in elasmobranchs is unresolved. Our goal was to quantify rosette morphology and shape from 14 species using dissections, phylogenetic comparisons, and microCT imaging. We hypothesized that lamellar count and rosette shape (fineness ratio) would not scale with animal size, but internal rosette size variables must scale positively. We found that fineness ratio and lamellar counts varied significantly among species, and were positively correlated. The first two principal components of the pPCA explained 82% of the variation, with fineness ratio and lamellar count contributing the most. There were no significant differences between rosette structure or volume when comparing dissected values to in situ values obtained using diceCT. Based on our results, we hypothesize that variations in rosette shape and morphology will impact hydrodynamics and optimize odorant detection, and these data can be used to create 3D models for future hydrodynamic studies. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2020. / FAU Electronic Theses and Dissertations Collection