Thesis (Ph. D.)--University of Michigan, 1918. / Cover title. "Reprint from the Journal of laboratory and clinical medicine, St. Louis, vol. IV, no. 4, January, 1919." Bibliography: p. 18.

Thèse--Universit́e de Paris. / "Index bibliographique": p. [59]-64.

No description available.

Thesis--Copenhagen. / "Summary": p. 261-265. Bibliography: p. [266]-272.

Thesis (M.S.)--University of Wisconsin--Madison, 1981. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 47-48).

Thesis (M. Communication Pathology)--University of Pretoria, 2006. / Summary in English and Afrikaans. Includes bibliographical references.

Thesis (Ed.M.)--Boston University / The purpose of this study is the construction of ear training exercises to improve the auditory discrimination of children in beginning reading. It is an effort to provide training in seeing the formation of sounds on the lips, kinesthetic training in feeling the sounds as they are spoken, in addition to auditory training in distinguishing word elements.

No description available.

Based on anatomical changes known to occur in the middle ear with aging, the purpose of this study was to compare middle ear resonant frequency values of geriatric subjects to those of young adults. Measurements were obtained with two different methods: sweep frequency tympanometry and discrete multifrequency tympanometry. Results from the two methods of measurement were also compared. Furthermore, intra-subject, inter-judge, and longitudinal reliability were examined for each measurement method. Results showed no significant difference between the two age groups. However, resonant frequency values obtained with the two measurement methods differed significantly (p < 0.05). Intra-subject and longitudinal reliability measures were significantly higher for the discrete multifrequency method than for the sweep frequency method. Inter-judge reliability was 95% for both measurement methods. We therefore concluded that age does not have a significant effect on middle ear resonant frequency values. It follows that normative resonant frequency data can be applied to adults of all age groups. Furthermore, the method used to measure resonant frequency has a significant effect on the values obtained, and comparisons of resonant frequency data should not be made across measurement methods. Although we were unable to determine which measurement method is most valid, the discrete multifrequency method is more reliable within subjects and over time. / Medicine, Faculty of / Audiology and Speech Sciences, School of / Graduate

Afferent neurons transmit information from both external and internal origin into the central nervous system (CNS). Sensory organs are connected at the periphery to these neurons, which in turn project into specific regions in the CNS. In sensory organs, such as the vertebrate ear, which receive auditory and vestibular stimuli, establishing precise connections with central targets is necessary for discrete, simultaneous, and efficient processing. However, it is not clear how afferents of the inner ear establish central projections with their target nuclei in the hindbrain. Transplantation of ears in Xenopus laevis offer a method through which the navigational properties of inner ear afferents can be experimentally tested. Specifically, grafting of ears to novel locations allow us to assess the pathfinding capabilities of afferents following ectopic placement. In transplanting ears adjacent to the spinal cord, we found that despite variable entry points along the dorsal-ventral axis, afferents projected dorsally, similar to projections of native ears in the hindbrain. Furthermore, these afferents were able to reach the hindbrain and project into vestibular nuclei. Late stage transplantations to the spinal cord revealed ear afferent fasciculation with afferents of the lateral line, indicating an alternative navigational route. Similarly, ventral transplantations to the heart region demonstrated ear afferent projection with the vagus nerve. These results collectively suggest that inner ear afferents are molecularly guided to reach their targets in the CNS once they are in proximity to it. However, they also display a capability to project along existing nerves both within the central and peripheral nervous systems. These results provide new information into how inner ear afferents navigate to connect with the CNS.