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Echo-level compensation and delay tuning in the auditory cortex of the mustached bat

dc.contributor.authorMacías S.
dc.contributor.authorMora E.C.
dc.contributor.authorHechavarría J.C.
dc.contributor.authorKössl M.
dc.date.accessioned2020-09-02T22:21:56Z
dc.date.available2020-09-02T22:21:56Z
dc.date.issued2016
dc.identifier10.1111/ejn.13244
dc.identifier.citation43, 12, 1647-1660
dc.identifier.issn0953816X
dc.identifier.urihttps://hdl.handle.net/20.500.12728/5157
dc.descriptionDuring echolocation, bats continuously perform audio-motor adjustments to optimize detection efficiency. It has been demonstrated that bats adjust the amplitude of their biosonar vocalizations (known as ‘pulses’) to stabilize the amplitude of the returning echo. Here, we investigated this echo-level compensation behaviour by swinging mustached bats on a pendulum towards a reflective surface. In such a situation, the bats lower the amplitude of their emitted pulses to maintain the amplitude of incoming echoes at a constant level as they approach a target. We report that cortical auditory neurons that encode target distance have receptive fields that are optimized for dealing with echo-level compensation. In most cortical delay-tuned neurons, the echo amplitude eliciting the maximum response matches the echo amplitudes measured from the bats’ biosonar vocalizations while they are swung in a pendulum. In addition, neurons tuned to short target distances are maximally responsive to low pulse amplitudes while neurons tuned to long target distances respond maximally to high pulse amplitudes. Our results suggest that bats dynamically adjust biosonar pulse amplitude to match the encoding of target range and to keep the amplitude of the returning echo within the bounds of the cortical map of echo delays. © 2016 Federation of European Neuroscience Societies and John Wiley & Sons Ltd
dc.language.isoen
dc.publisherBlackwell Publishing Ltd
dc.subjectamplitude representation
dc.subjectauditory cortex
dc.subjectbats
dc.subjectecho-level compensation
dc.subjectecholocation
dc.subjectacoustic nerve fiber
dc.subjectadult
dc.subjectamplitude modulation
dc.subjectanimal behavior
dc.subjectanimal experiment
dc.subjectArticle
dc.subjectauditory cortex
dc.subjectauditory discrimination
dc.subjectauditory response
dc.subjectauditory stimulation
dc.subjectauditory system parameters
dc.subjectbat
dc.subjectcontrolled study
dc.subjectdelay tuning
dc.subjectdistance perception
dc.subjectecho level compensation
dc.subjectecholocation
dc.subjectfemale
dc.subjectfrequency modulation
dc.subjectmale
dc.subjectnonhuman
dc.subjectpriority journal
dc.subjectPteronotus parnellii
dc.subjectreceptive field
dc.subjectstimulus response
dc.titleEcho-level compensation and delay tuning in the auditory cortex of the mustached bat
dc.typeArticle


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