Neural Coding of Sound Frequency by Cricket Auditory Receptors

Imaizumi, Kazuo; Pollack, Gerald S.

doi:10.1523/jneurosci.19-04-01508.1999

Cited by 76 publications

(51 citation statements)

References 46 publications

(51 reference statements)

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“…The response ambiguity exhibited by Ormia at the category boundary (Fig.4C) may be an effect of this broad tuning: mid-range frequencies may excite both low-and highfrequency afferents, resulting in a conflicting signal and potential lack of response. This behavior contrasts with that seen in the cricket, where few ambiguous or non-responses occur at category boundary, and where tuning curves of auditory afferents are less broad than in Ormia (Imaizumi and Pollack, 1999;Ramsauer and Robert, 2000;Zaretsky and Eibl, 1978). This neural organization could allow a strong sensory signal of a relevant frequency to reliably elicit a given motor response.…”

Section: T Oceanicusmentioning

confidence: 61%

The cost of assuming the life history of a host: acoustic startle in the parasitoid fly Ormia ochracea

Rosen

Levin

Hoy

2009

Journal of Experimental Biology

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SUMMARYIn the obligatory reproductive dependence of a parasite on its host, the parasite must trade the benefit of 'outsourcing' functions like reproduction for the risk of assuming hazards associated with the host. In the present study, we report behavioral adaptations of a parasitic fly, Ormia ochracea, that resemble those of its cricket hosts. Ormia females home in on the male cricket's songs and deposit larvae, which burrow into the cricket, feed and emerge to pupate. Because male crickets call at night, gravid female Ormia in search of hosts are subject to bat predation, in much the same way as female crickets are when responding to male song. We show that Ormia has evolved the same evasive behavior as have crickets: an acoustic startle response to bat-like ultrasound that manifests clearly only during flight. Furthermore, like crickets, Ormia has a sharp response boundary between the frequencies of song and bat cries, resembling categorical perception first described in the context of human speech. Supplementary material available online at

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Section: T Oceanicusmentioning

confidence: 61%

The cost of assuming the life history of a host: acoustic startle in the parasitoid fly Ormia ochracea

Rosen

Levin

Hoy

2009

Journal of Experimental Biology

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“…It receives direct input from two populations of receptor neurons (Hennig, 1988) that are sensitive to two separate frequency ranges (Imaizumi and Pollack, 1999). Since the requirements on coding and processing in these two contexts also differ (Marsat and Pollack, 2004), we first tested whether adaptation changes the response curve of the AN2 in a frequency-specific way.…”

Section: Changes Of the Response Curves In The Two Frequency Channelsmentioning

confidence: 99%

Multiple Arithmetic Operations in a Single Neuron: The Recruitment of Adaptation Processes in the Cricket Auditory Pathway Depends on Sensory Context

Hildebrandt

Benda²,

Hennig³

2011

J. Neurosci.

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Sensory pathways process behaviorally relevant signals in various contexts and therefore have to adapt to differing background conditions. Depending on changes in signal statistics, this adjustment might be a combination of two fundamental computational operations: subtractive adaptation shifting a neuron's threshold and divisive gain control scaling its sensitivity. The cricket auditory system has to deal with highly stereotyped conspecific songs at low carrier frequencies, and likely much more variable predator signals at high frequencies. We proposed that due to the differences between the two signal classes, the operation that is implemented by adaptation depends on the carrier frequency. We aimed to identify the biophysical basis underlying the basic computational operations of subtraction and division.We performed in vivo intracellular and extracellular recordings in a first-order auditory interneuron (AN2) that is active in both mate recognition and predator avoidance. We demonstrated subtractive shifts at the carrier frequency of conspecific songs and division at the predator-like carrier frequency. Combined application of current injection and acoustic stimuli for each cell allowed us to demonstrate the subtractive effect of cell-intrinsic adaptation currents. Pharmacological manipulation enabled us to demonstrate that presynaptic inhibition is most likely the source of divisive gain control.We showed that adjustment to the sensory context can depend on the class of signals that are relevant to the animal. We further revealed that presynaptic inhibition is a simple mechanism for divisive operations. Unlike other proposed mechanisms, it is widely available in the sensory periphery of both vertebrates and invertebrates.

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“…At the peripheral level, the mechanical system that transduces sound, the tympanum, is resonant at frequencies close to the CF (Paton et al, 1977;Larsen and Michelsen, 1978). At the next level, the auditory receptors are tuned to different frequencies, with a large number tuned to frequencies close to the CF, each with a much higher selectivity than the tympanal membrane alone (Oldfield et al, 1986;Ball et al, 1989;Larsen et al, 1989;Imaizumi and Pollack, 1999). The tuning of these two systems effectively acts as a filter set, reducing the representation of non-CF frequencies in the auditory system, making the receiver less likely to perceive heterospecific songs.…”

Section: Introductionmentioning

confidence: 99%

Matching sender and receiver: poikilothermy and frequency tuning in a tree cricket

Mhatre

Bhattacharya

Robert

et al. 2011

Journal of Experimental Biology

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SUMMARYAnimals communicate in non-ideal and noisy conditions. The primary method they use to improve communication efficiency is sender-receiver matching: the receiver's sensory mechanism filters the impinging signal based on the expected signal. In the context of acoustic communication in crickets, such a match is made in the frequency domain. The males broadcast a mate attraction signal, the calling song, in a narrow frequency band centred on the carrier frequency (CF), and the females are most sensitive to sound close to this frequency. In tree crickets, however, the CF changes with temperature. The mechanisms used by female tree crickets to accommodate this change in CF were investigated at the behavioural and biomechanical level. At the behavioural level, female tree crickets were broadly tuned and responded equally to CFs produced within the naturally occurring range of temperatures (18 to 27°C). To allow such a broad response, however, the transduction mechanisms that convert sound into mechanical and then neural signals must also have a broad response. The tympana of the female tree crickets exhibited a frequency response that was even broader than suggested by the behaviour. Their tympana vibrate with equal amplitude to frequencies spanning nearly an order of magnitude. Such a flat frequency response is unusual in biological systems and cannot be modelled as a simple mechanical system. This feature of the tree cricket auditory system not only has interesting implications for mate choice and species isolation but may also prove exciting for bio-mimetic applications such as the design of miniature low frequency microphones.

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Neural Coding of Sound Frequency by Cricket Auditory Receptors

Cited by 76 publications

References 46 publications

The cost of assuming the life history of a host: acoustic startle in the parasitoid fly Ormia ochracea

The cost of assuming the life history of a host: acoustic startle in the parasitoid fly Ormia ochracea

Multiple Arithmetic Operations in a Single Neuron: The Recruitment of Adaptation Processes in the Cricket Auditory Pathway Depends on Sensory Context

Matching sender and receiver: poikilothermy and frequency tuning in a tree cricket

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