| the vertebrate ear as an exquisite seismic sensor. | the neotropical frog leptodactylus albilabris exhibits the greatest sensitivity to substrate-borne vibrations (seismic stimuli) reported to date for any terrestrial animal. nerve fibers from the source of this extraordinary sensitivity in the ear show clear stimulus-evoked modulations of their resting discharge rates in response to sinusoidal seismic stimuli with peak accelerations less than 0.001 cm/s2 (10(-6) g). evidence indicates that its source is the saccule, an organ of hearing in fish an ... | 1984 | 6512101 |
| spontaneous otoacoustic emissions in seven frog species. | spontaneous otoacoustic emissions were screened for in five advanced frog species (hyla cinerea, n = 10 ears; hyla chrysoscelis, n = 10; hyla versicolor, n = 7; leptodactylus albilabris, n = 2; rana pipiens pipiens, n = 8), and two primitive frog species (xenopus laevis, n = 9; bombina orientalis, n = 12). emissions were found in 90% of the advanced species' ears, whereas none of the primitive species' ears had emissions. emission frequencies ranged from 645 hz to 1680 hz. the absence of emissio ... | 1996 | 8951437 |
| molecular phylogeny and biogeography of west indian frogs of the genus leptodactylus (anura, leptodactylidae). | three endemic species of the aquatic-breeding frog genus leptodactylus are recognized from the west indies: leptodactylus albilabris (puerto rico and the virgin islands), leptodactylus dominicensis (hispaniola), and leptodactylus fallax (lesser antilles). dna sequences were obtained from several mitochondrial genes to resolve taxonomic questions involving these species and to provide insights into their origin and distribution in the islands. we found low levels of sequence divergence between l. ... | 2007 | 17196836 |
| sound and vibration sensitivity of viiith nerve fibers in the frogs leptodactylus albilabris and rana pipiens pipiens. | 1. responses of 73 fibers to dorso-ventral vibration were recorded in the saccular and utricular branchlets of rana pipiens pipiens using a ventral approach. the saccular branchlet contained nearly exclusively vibration-sensitive fibers (33 out of 36) with best frequencies (bfs) between 10 and 70 hz, whereas none of the 37 fibers encountered in the utricular branchlet responded to dorso-ventral vibrations. 2. using a dorsal approach we recorded from the viiith nerve near its entry in the brainst ... | 1993 | 8350283 |