computerized tomography

The auditory anatomy of the Minke Whale (<em>Balaenoptera acutorostrata</em>): Insights into potential sound reception pathways in a baleen whale

[1431] Yamato M, Ketten DR, Arruda JJ, Cramer SR, Moore K. The auditory anatomy of the Minke Whale (Balaenoptera acutorostrata): Insights into potential sound reception pathways in a baleen whale. In: 19th Biennial Conference on the Biology of Marine Mammals. Vol Abstracts. Tampa, FL: Society for Marine Mammology; 2011. 319. Get PDF:  Abstract.pdf (format PDF / 162 KB) Ken Norris first described a potential mandibular sound reception pathway in odontocetes in 1964. To date, sound reception paths in mysticetes remain unknown. To understand hearing mechanisms in baleen whales, a thorough examination of their auditory anatomy is required. This study combines classical dissection with biomed1cal imaging techniques such as X-ray, computerized tomography (CT), and magnetic resonance imaging (MRl) to describe the anatomy of the minke whale head with a focus on the ear region. Six individuals have been examined to date.

Hearing Loss in Harbor Seals: Differential Diagnoses of Conductive and Sensorineural Losses via Auditory Evoked Potentials (AEP), Otoacoustic Emissions (OAE), and Computerized Tomography (CT)

[1430] Ketten DR, Mooney AT, Williams RC, Matassa K, Patchett K, Arruda JJ, et al. Hearing Loss in Harbor Seals: Differential Diagnoses of Conductive and Sensorineural Losses via Auditory Evoked Potentials (AEP), Otoacoustic Emissions (OAE), and Computerized Tomography (CT). In: 19th Biennial Conference on the Biology of Marine Mammals. Tampa, FL: Society for Marine Mammology; 2011. 156. Get PDF:  Abstract.pdf (format PDF / 143 KB) As concerns for noise impacts continue, more species and individuals are being tested to determine hearing ranges and peak sensitivities. In employing these results, it must be considered that data, particularly from stranded wild animals, older individuals, or high noise areas, may reflect abnormal hearing. Case studies demonstrate pinnipeds sustain a wide range of conditions that may impair hearing. Approximately 20 % of stranded seals have ear infections which if undetected and untreated may lead to septicemia.
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