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Evoked cochlear potentials in the barn owl


, : Evoked cochlear potentials in the barn owl. Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology 193(6): 601-612

Gross electrical responses to tone bursts were measured in adult barn owls, using a single-ended wire electrode placed onto the round window. Cochlear microphonic (CM) and compound action potential (CAP) responses were evaluated separately. Both potentials were physiologically vulnerable. Selective abolishment of neural responses at high frequencies confirmed that the CAP was of neural origin, while the CM remained unaffected. CAP latencies decreased with increasing stimulus frequency and CAP amplitudes were correlated with known variations in afferent fibre numbers from the different papillar regions. This suggests a local origin of the CAP along the tonotopic gradient within the basilar papilla. The audiograms derived from CAP and CM threshold responses both showed a broad frequency region of optimal sensitivity, very similar to behavioural and single-unit data, but shifted upward in absolute sensitivity. CAP thresholds rose above 8 kHz, while CM responses showed unchanged sensitivity up to 10 kHz.

US$19.90

PMID: 17318655

DOI: 10.1007/s00359-007-0215-0


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Vázquez-Lima, H.; Guadarrama, P.; Martínez-Anaya, C., 2012: Geometric distortions on a three-coordinated T1 Cu site model as a potential strategy to modulate redox potential. A theoretical study. A model of the three-coordinated T1 Cu site from <i>Trametes versicolor</i> was considered to evaluate the effect on redox potential of geometrical distortions in the copper coordination sphere. Systematic modifications of geometrical...

Vanossi, L., 1982: Mevalonic acid from yeast. Industrie alimentari 21(1): 31-32

Wilkie, N.M.; Smellie, R.M.S., 1968: Poly ribo nucleotide synthesis by sub fractions of microsomes from rat liver enz di esterase. Biochemical Journal 109(2): 229-238

Boismare, F.; Camacho, M.; Denys, A.; Lechat, P.; Levy, J.; Michel-Ber, E., 1968: Interference of MAOI and barbiturate hypnotics. Hypothesis on the mechanisms of action. Therapie 23(4): 863-877

Wexelsen, H., 1928: Two New Mutant Characters on the Spermathecae of the Females of DROSOPHILA MELANOGASTER. Cell-Degeneration and Supernumerary Spermathecae. Genetics 13(5): 389-400

Poole D.T.; Butler T.C., 1970: Effects of valinomycin and potassium on glycolysis and intra cellular ph of ehrlich ascites tumor cells. Federation Proceedings 29(2): 807

Green, Js, 1989: APHIS Animal Damage Control Livestock guarding dog program. General technical report RM Rocky Mountain Forest and Range Experiment Station US Department of Agriculture Forest Service: (171) 50-53

Batista Filho, A.; Cruz, B.P.B.; Camargo, L.M.P.C. de A.; Oliveira, D.A., 1985: Growth of Beauveria sp., isolated from the cotton weevil (Anthonomus grandis Boheman), in natural liquid culture media. In laboratory tests in Brazil, the strain of Beauveria bassiana isolated in Campinas, Sao Paulo, in 1983 from the cotton pest Anthonomus grandis was cultured on different media; rice broth, bean broth or potato broth, sterilized water being used a...

Niemeyer, L., 1963: Weather and wine cultivation 1962 in the German Bundes territory. Weinberg Und Keller 10(1/2): 5-20

Riley, I.T.; Swart, A., 2004: Aspects of reproduction and survival of Anguina woodi. The contents of galls formed by Anguina woodi in Ehrharta villosa var. villosa from South Africa were examined. Bacterial colonisation was evident in six of 48 galls and inhibited nematode development, but did not prevent it in all cases. Galls wi...