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  • 1
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    Reformation of organized connections in the auditory system after generation of the eighth nerve (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-07-10
    Description: Binaural cells in the superior olive normally have identical frequency sensitiveness when acoustically stimulated via either ear. The precision with which central connections are reformed after auditory nerve regeneration can be determined by comparing the frequency sensitiveness of the two binaural inputs to these cells. Three months after cutting the nerve and subsequent regeneration in the leopard frog, binaural cells once again have well-matched frequency sensitivities. Thus, the specificity of central connectivity that characterizes the auditory system in normal animals is restored after regeneration.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zakon, H -- Capranica, R R -- NS 09244/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 10;213(4504):242-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6972599" target="_blank"〉PubMed〈/a〉
    Keywords: Acoustic Stimulation ; Animals ; Electric Conductivity ; Evoked Potentials ; Functional Laterality ; Hearing ; *Nerve Regeneration ; Olivary Nucleus/physiology ; Rana pipiens ; Vestibulocochlear Nerve/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Temporal selectivity in the central auditory system of the leopard frog (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-03-04
    Description: Amplitude modulation is a predominant temporal feature in many vocal signals. The leopard frog, Rana pipiens, has a class of neurons in the central auditory system that respond selectively to particular rates of amplitude modulation; these neurons can be characterized by a temporal tuning curve. Such selectivity is absent in the peripheral auditory system. This type of transformation may be fundamental in processing temporal information in the vertebrate sensory nervous system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rose, G -- Capranica, R R -- NS-09244/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1983 Mar 4;219(4588):1087-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6600522" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Communication ; Animals ; Auditory Pathways/*physiology ; Auditory Perception/*physiology ; Brain/physiology ; Rana pipiens/*physiology ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Aggressive signal in "courtship" chirps of a gregarious cricket (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-11-05
    Description: Unlike other known species of crickets, Amphiacusta maya in Central America mates in groups. Experimentally silenced males experience reduced mating success, not owing to decreased receptivity by females, but owing to increased time spent fighting with other males that persistently interrupt silent courtships. Thus, the data indicate that "courtship" chirping functions as a warning to other males, rather than as a signal to females.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boake, C R -- Capranica, R R -- New York, N.Y. -- Science. 1982 Nov 5;218(4572):580-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17842062" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Bilateral syringeal interaction in vocal production of an oscine bird sound (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-03-14
    Description: The vocal organ, or syrinx, of oscine birds has two parts, each of which has generally been presumed to operate independently of the other. A significant counter-example is now demonstrated in the production of a common vocalization by the black-capped chickadee (Parus atricapillus), in which the two acoustic sources interact in a nonlinear fashion. This bird produces a sound with multiple frequency components that are heterodyne products resulting from cross-modulation between two signals, thus providing evidence that avian phonation can involve cooperative coupling between the two syringeal sources.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nowicki, S -- Capranica, R R -- 5 T32 MH 15793-05/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1986 Mar 14;231(4743):1297-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3945824" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Birds/anatomy & histology/*physiology ; Sound Spectrography ; Vocalization, Animal/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Directional hearing of awake, unrestrained treefrogs (1986)
    Springer
    Details
    Publication Date: 1986-11-01
    Print ISSN: 0028-1042
    Electronic ISSN: 1432-1904
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Published by Springer
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  • 6
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    The evoked vocal response of the bullfrog- A study of communication by sound (1965)
    In:  CASI
    Details
    Publication Date: 2019-05-29
    Description: Evoked vocal response of bullfrog - communication by sound
    Keywords: BIOSCIENCES
    Type: NASA-CR-67962
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
    Electronic Resource
    Electronic Resource
    Spike generation in the lateral-line afferents ofXenopus laevis: Evidence favoring multiple sites of initiation (1973)
    Springer
    Journal of comparative physiology 87 (1973), S. 1-20 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. Arrival-time differences of spikes recorded simultaneously at two sites from single lateral-line afferent fibers often fall into distinct populations, or have broad distributions. These findings are consistent with the notion that spikes arise at several different points within the branches of the afferent fibers. 2. Mechanical stimulation of an individual neuromast emphasizes one class of relative arrival-times, as would be expected if there were multiple sites of spike initiation. 3. During single-neuromast mechanical stimulation, spikes belonging to the emphasized classes are more tightly locked to the stimulus than are other spikes. This finding would also be anticipated under the hypothesis of multiple spike-initiation sites. 4. Coupling the evidence for multiple loci of spike generation with previously described indications of “resetting” after each spike, we propose that sensory messages transmitted fromXenopus lateral-line organs might be characterized by order statistics. This type of sensory process has not heretofore been studied. 5. The type of operation suggested for the lateral-line organs may be relevant to other acoustico-lateralis organs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00699292
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  • 8
    Electronic Resource
    Electronic Resource
    Encoding of phase spectra by the peripheral auditory system of the bullfrog (1994)
    Springer
    Journal of comparative physiology 174 (1994), S. 157-171 
    Details
    ISSN: 1432-1351
    Keywords: Phase spectrum ; Periodic signals ; Temporal waveform ; Auditory nerve fibers ; Anuran
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract In this study we have examined the sensitivity of auditory nerve fibers in the bullfrog (Rana catesbeiana) to changes in the phase spectrum of an equal-amplitude multi-harmonic stimulus which spanned the bullfrog's range of hearing. To assess peripheral auditory phase sensitivity, changes in the response properties of VIIIth nerve fibers were measured when the relative phase angle of a single harmonic component nearest a unit's best excitatory frequency was systematically varied. The results revealed that shifts in the phase spectrum are encoded in at least J different ways by the peripheral auditory system of the bullfrog: 1) by changes in the degree of spike synchronization of fibers from both inner ear organs (the amphibian papilla and the basilar papilla) to the fundamental waveform period; 2) by changes in the shapes of period histograms of fibers from both organs; and 3) by changes in the spike rates of amphibian papilla fibers. The presence of phase sensitivity in the peripheral auditory system of the bullfrog indicates that information regarding the fine-temporal waveshape and the underlying phase spectrum of an acoustic signal is contained within the spike trains of VIIIth nerve fibers. Similar sensitivities to changes in the phase spectra and temporal waveshapes of acoustic signals may also be present in the peripheral auditory system of other vertebrates. Such studies could provide valuable insight into the role that phase spectra and temporal waveshape may play in bioacoustic communication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193783
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  • 9
    Electronic Resource
    Electronic Resource
    Correlation between auditory evoked responses in the thalamus and species-specific call characteristics (1987)
    Springer
    Journal of comparative physiology 160 (1987), S. 477-489 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary This evoked potential study of the bullfrog's auditory thalamic area (an auditory responsive region in the posterior dorsal thalamus) shows that complex processing, distinct from that reported in lower auditory regions, occurs in this center. 1. An acoustic stimulus consisting of two tones, one which stimulates either the low-frequency or the mid-frequency sensitive population of auditory nerve fibers from the amphibian papillaand the other the high-frequency sensitive population of fibers from the basilar papilla, evoked a maximal response (Fig. 3). 2. The amplitude of the response to the simultaneous stimulation of the two auditory organs was, in some locations, much larger than the linear sum of the responses to the individual tones presented separately (Fig. 4). 3. Bimodal spectral stimuli that had relatively long rise-times (≥100 ms) evoked much larger re sponses than similar sounds with short rise-times (Fig. 6). The optimal rise-times were close to those occurring in the bullfrog's mating call. 4. The response was dependent on the waveform periodicity and harmonic content, with a fundamental frequency of 200 Hz producing a larger response than those with fundamentals of 50, 100 or 300 Hz (Fig. 9). 5. Six of the natural calls in the bullfrog's vocal repertoire were tested and the mating call (Fig. 8) and warning call (Fig. 10) were found to evoke the best responses. Each of these calls stimulate the two auditory organs simultaneously. 6. The evoked response had a long refractory period which could not be altered by lesioning the efferent telencephalic pathways (Fig. 5). 7. The type of spectral and temporal information extracted by the auditory thalamic area suggests that this center is involved in processing complex sounds and likely plays an important role in the bullfrog's detection of some of its vocal signals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00615081
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  • 10
    Electronic Resource
    Electronic Resource
    Correlation between auditory thalamic area evoked responses and species-specific call characteristics (1987)
    Springer
    Journal of comparative physiology 161 (1987), S. 407-416 
    Details
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Evoked potentials were recorded from the posterior dorsal thalamus of green treefrogs (Hyla cinerea) in response to single tones and combinations of two and three tones. 1. The responses to two tones were largest when one of the component tones was 500 Hz and when the second component was between 2000 and 4000 Hz (Fig. 3). 2. The response to 500+3000 Hz showed non-linear facilitation; i.e., the amplitude of the response was greater than the sum of the responses to the component tones alone (Figs.4, 5). This result provides evidence that cells functioning as ‘ AND ’ gates will be found in this center. 3. When a third tone around 1200 Hz was added to a stimulus of 500+3000 Hz a 65% decrease in the evoked response amplitude occurred (Fig. 6). 4. The largest evoked response amplitude to a two-tone stimulus (500+3000 Hz) occurred when the rise-time was less than 50 ms (Fig. 7). 5. The two-tone tuning was found to be temperature dependent. The optimal lower frequency tone shifted downward with decreasing temperatures (Fig. 8). 6. When the temperatures of the neurophysiological and the behavioral experiments are matched, the optimal stimuli for evoking a large response are closely correlated to the parameters of the acoustic stimuli preferred by gravidH. cinerea females in discrimination tests. This center therefore appears to be very important for the processing of complex species-specific sounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00603966
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