Representation of sound pressure and particle motion information in the midbrain of the goldfish |
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| Authors: | F R Fay C M Hillery K Bolan |
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| Affiliation: | 1. Parmly Hearing Institute, Loyola University of Chicago. 6525 N. Sheridan Road, Chicago, IL 60626, U.S.A.;2. Department of Anatomy, University of Chicago, 1025 E. 57th Street, Chicago, IL 60637, U.S.A.;1. Department of Chemistry and NIS Centre, University of Turin, Via Pietro Giuria 7, Turin, Italy;2. Department of Materials Science, University of Milano-Bicocca, Via Roberto Cozzi 55, Milan, Italy;3. Institute for Heritage Science (ISPC), National Research Council (CNR), Via Roberto Cozzi 53, Milan, Italy;4. Department of Physical Chemistry, Faculty of Chemistry, University of Santiago de Compostela, Santiago de Compostela, Spain;1. University of Gothenburg, Gothenburg, Sweden;2. Chalmers University of Technology, Gothenburg, Sweden;1. Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;2. Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;3. Department of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;1. Department of Forensic Science, Fujian Police College, Fuzhou 350007, PR China;2. Engineering Research Center, Fujian Police College, Fuzhou 350007, PR China;3. Institute of Forensic Science, Nanping Bureau of Public Security, 353000, PR China |
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| Abstract: | 1. Averaged evoked responses from multiple electrodes in the goldfish midbrain (torus semicircularis) area were recorded in response to acoustic stimulation by loudspeaker and to direct vertical vibration of the head. 2. Relative pressure and displacement sensitivity was such that in the far field, the response to sound pressure would dominate the response to particle motion by 40-90 dB. 3. Swimbladder deflation caused a flat (70-1000 Hz) loss in pressure sensitivity ranging from 20 to over 50 dB, and led to an enhanced response to vibration at low frequencies. 4. The goldfish midbrain is not homogeneous with regard to relative pressure and motion sensitivity. |
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