. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 258 10% or more) was observed for sinusoidal stimuli in excess of 500 uV rms. Our voltage-clamp transfer data indicate that high sensitivity in the microvolt range is a property of an isolated organ prep- aration. Further, we find that the afferent nerve firing rate sat- urates for epithelial voltages that exceed 100 i*V. Together with our harmonic analysis, these data suggest that the ampullary epithelium behaves as a linear transducer over the operating range of the afferent nerve. Supported by ONR (N00014-90-J-1137) to H.
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 258 10% or more) was observed for sinusoidal stimuli in excess of 500 uV rms. Our voltage-clamp transfer data indicate that high sensitivity in the microvolt range is a property of an isolated organ prep- aration. Further, we find that the afferent nerve firing rate sat- urates for epithelial voltages that exceed 100 i*V. Together with our harmonic analysis, these data suggest that the ampullary epithelium behaves as a linear transducer over the operating range of the afferent nerve. Supported by ONR (N00014-90-J-1137) to Literature Cited 1. Kalmijn, A. J. 1982. Science 218: 916-918. 2. Clusin, \V. T., and M. V. L. Bennett. 1977. J. Gen. Phvswl. 69: 121. 3. Fishman, H. M., and R. I. Macey. 1969. Biophys. J. 9: 127-139. 4. Murray, R. \V. 1962. J. E\p BioL 39: 119. 5. Bodznick, D., G. Hjelmstad, and M. V. L. Bennett. 1993. Jpn. J. Physwl. 43, Suppl 1: S231-S237. 6. Clusin, W. T., and M. V. L. Bennett 1979. J. Gen. Physiol. 73: 685-702. Reference: Biol. Bull 187: 258-259. (October, 1994) Directional Sensitivity of Saccular Afferents of the Toadfish to Linear Acceleration at Audio Frequencies Richard R. Fay, Peggy L. Edds-Walton, and Stephen M. Highstein (Marine Biological Laboratory) Hair cells are physiologically polarized and respond to de- flection of their stereocilia in a directional manner (1). These cells are organized in various orientations on the otolithic end- organs of fishes. Otolithic endorgans respond to linear acceler- ations of the head with the otolith providing an inertial restraint for hair cell stereocilia. In many fishes, at least one of the otolithic endorgans, the saccule. also responds to acoustic particle motion (2). We investigated whether the saccule's response to particle motion could mediate the detection and localization of sound sources in the toadfish (Opsanus tan). Both male and female toadfish produce vocalizations in social contexts, and males produce courts
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