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Characterization and modeling of P-type electrosensory afferent responses to amplitude modulations in a wave-type electric fish
A computationally efficient model of P-type afferent response dynamics is presented which accurately characterizes changes in afferent firing rate in response to amplitude modulations of the fish's own electric organ discharge over a wide range of AM frequencies relevant to active electrolocation. Expand
Logarithmic time course of sensory adaptation in electrosensory afferent nerve fibers in a weakly electric fish.
A new functional form for describing the time course of sensory adaptation in which the change in firing rate delta r decays logarithmically with time is introduced, which appears to accurately capture the response dynamics of P-type afferents over a wide range of behaviorally relevant AM frequencies. Expand
Acoustic response properties of lagenar nerve fibers in the sleeper goby, Dormitator latifrons
The lagena of D. latifrons plays a role in sound localization in elevation, particularly at high stimulus intensities where responses of most saccular fibers are saturated. Expand
Coding of acoustic particle motion by utricular fibers in the sleeper goby, Dormitator latifrons
Results of this study indicate that the utricle in this vertebrate plays an auditory role in azimuth and that utricular fibers extend the response dynamic range of this species in directional hearing. Expand
Effects of saccular otolith removal on hearing sensitivity of the sleeper goby (Dormitator latifrons)
  • Z. Lu, Z. Xu
  • Biology, Medicine
  • Journal of Comparative Physiology A
  • 1 September 2002
The results demonstrate that the saccule plays important roles in directional hearing and frequency responses in a teleost fish and effects of unilateral and bilateral removal of saccular otoliths on its hearing sensitivity. Expand
M-wave of the toad electroretinogram.
An ERG component, the M-wave, which had not heretofore been observed in the diffuse-flash, vitreal ERG, is described, indicating that the amphibian threshold ERG is driven by proximal retina and that GABAergic inhibition in inner retina plays an important role in retinal processing in the toad. Expand
Spatial buffering of extracellular potassium by Müller (glial) cells in the toad retina.
The results show that Müller cell K+ currents not only buffer light-evoked increases in [K+]o, but also buffer light -evoked decreases in [Bufo marinus], and thereby diminish any deleterious effects upon neuronal function that could arise in response to large changes in K+ in the plexiform layers. Expand
PII component of the toad electroretinogram.
This is the first report of the isolation of a PII component in the ERG of a nonmammalian species and hypothesize that the DC component is generated by a K+/Müller cell mechanism identical to that involved in b-wave generation. Expand