A Micromechanical Contribution to Cochlear Tuning and Tonotopic Organization
1983; American Association for the Advancement of Science; Volume: 222; Issue: 4623 Linguagem: Inglês
10.1126/science.6623089
ISSN1095-9203
AutoresThomas Holton, A. J. Hudspeth,
Tópico(s)Acoustic Wave Phenomena Research
ResumoThe response properties of hair cells and nerve fibers in the alligator lizard cochlea are frequency selective and tonotopically organized with longitudinal position in the organ. The lengths of the hair-cell hair bundles also vary monotonically with longitudinal position. In this study, quantitative measurements were made of the motion of individual hair bundles in an excised preparation of the cochlea stimulated at auditory frequencies. The angular displacement of hair bundles is frequency selective and tonotopically organized, demonstrating the existence of a micromechanical tuning mechanism.
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