Cochlear sensitivity in the lesser spear-nosed bat, Phyllostomus discolor

Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
Anna WittekindtM Kössl

Abstract

Behavioral auditory thresholds of Phyllostomus discolor are characterized by two threshold minima separated by an insensitive region at about 55 kHz (Esser and Daucher 1996). To investigate whether these characteristics are due to cochlear properties, we recorded distortion product otoacoustic emissions (DPOAEs) and calculated relative DPOAE threshold curves, which proved to be a good measure of cochlear sensitivity. Our results indicate that in P. discolor, cochlear sensitivity, as assessed by DPOAE recordings, does not show a threshold maximum at 55 kHz. The DPOAE threshold curves display an absolute minimum at approximately 30 kHz, and from that frequency region, the threshold continuously increases without any pronounced irregularities. The frequency tuning properties of the cochlea, as assessed by DPOAE suppression tuning curves (STCs) reveal broad filter bandwidths with Q10dB values between 3.4 and 10.7. There are no frequency-specific specializations of cochlear tuning. The characteristic pattern of subsequent threshold maxima and minima at high frequencies observed in behavioral studies seems to be shaped by transfer characteristics of the outer ear and/or neuronal processing in the ascending auditory pathway rather tha...Continue Reading

References

Nov 1, 1992·Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology·M MüllerV Bruns
May 1, 1991·The Journal of the Acoustical Society of America·R ProbstG K Martin
Aug 1, 1990·The Journal of the Acoustical Society of America·A M Brown, S A Gaskill
Jan 3, 1995·Proceedings of the National Academy of Sciences of the United States of America·M Kössl, I J Russell
Jun 1, 1996·Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology·K H Esser, A Daucher
Feb 1, 1996·Die Naturwissenschaften·M Kössl, M Vater
Sep 1, 1996·The Journal of the Acoustical Society of America·M L WhiteheadB L Lonsbury-Martin
May 1, 1997·Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology·K H Esser, B Lud
Nov 19, 1997·Progress in Neurobiology·M Ulfendahl
Nov 26, 1999·Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology·M KösslI J Russell
Nov 21, 2000·Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology·E Foeller, M Kössl
Jun 28, 2001·Physiological Reviews·L Robles, M A Ruggero
Sep 3, 2002·Hearing Research·Gimseong KoayRickye S Heffner
Sep 27, 2002·British Medical Bulletin·David T Kemp
Apr 10, 2003·Hearing Research·Gimseong KoayHenry E Heffner
Oct 14, 2003·Hearing Research·Markus Drexl, Manfred Kössl
Oct 14, 2003·Hearing Research·Rickye S HeffnerHenry E Heffner

❮ Previous
Next ❯

Citations

Jul 30, 2014·Journal of the Association for Research in Otolaryngology : JARO·D SchlentherM Kössl
Jul 5, 2007·Biological cybernetics·Arjan Boonman, Joachim Ostwald
Oct 27, 2015·PLoS Computational Biology·Dieter VanderelstHerbert Peremans
Nov 24, 2007·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Sven Schörnich, Lutz Wiegrebe
Nov 21, 2007·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Susanne HoffmannUwe Firzlaff
May 21, 2008·Biological cybernetics·Lutz Wiegrebe
Nov 28, 2012·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Daria Genzel, Lutz Wiegrebe

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.