On the role of the auditory critical bands in effects of stimulus-specific adaptation in the activity of primary auditory cortex neurons in awake mice

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Аннотация

The neurophysiological effects of stimulus-specific adaptation in the single neurons’ activity in the primary fields of the awake house mice auditory cortex were firstly studied. While adaptation of neuronal responses to sound sequences consisting of four identical tones, the time intervals between which were selected so as to be similar to the temporal structure of series of mouse pups wriggling call, adult females were stimulated by a fifth tone signal, the frequency of which differed from the frequency of the first four tone pulses in the series. The presentation of deviant tone led to a complete or partial neuronal responses recovery from adaptation in responses to the fifth component of the sequence, i.e. the response to the fifth tone was stronger than ones to the 2nd – 4th signals. Localization of the frequencies of main tonal sequence components and of the deviant one in two different non-overlapping critical bands of mouse hearing was followed by the most prominent effect of release from stimulus-specific adaptation. Thus, the critical band mechanism is involved in facilitating of the novelty responses of auditory neurons in the midbrain and auditory cortex.

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Авторлар туралы

M. Egorova

Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences

Хат алмасуға жауапты Автор.
Email: ema6913@yandex.ru
Ресей, 44, M. Torez Ave., Saint Petersburg, 194223

A. Akimov

Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences

Email: ema6913@yandex.ru
Ресей, 44, M. Torez Ave., Saint Petersburg, 194223

G. Khorunzhy

Sechenov Institute of Evolutionary Physiology and Biochemistry of the Russian Academy of Sciences

Email: ema6913@yandex.ru
Ресей, 44, M. Torez Ave., Saint Petersburg, 194223

Әдебиет тізімі

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  3. Vartanian I.A., Egorova M.A., Ehret G. Proyavlenie osnovnyh svoistv criticheskih polos v neironalnoy aktivnosti zadnih holmov myshi [Critical bands properties in the mouse inferior colliculus neurons activity]. Doklady Akademii nauk [Proceedings of the Academy of sciences]. 1999. V. 368(2). P. 270–272 (in Russian).
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  5. Egorova M.A., Akimov A.G., Khorunzhii G.D. Proyavleniaya stimul-specificheskoi adaptacii v reakciyah neironov sluhovoy kory bodrstvuyuschih myshei na modeli posledovatelnostei krika diskomforta myshat [Effects of stimulus-specific adaptation in the responses of primary auditory cortex neurons in awake mice using the model of mouse pups wriggling call sequences]. Integrativnaya fiziologiya [Integrative Physiology]. 2024. V. 5(3). P. doi: 10.33910/2687-1270-2024-5-3-**-** (in Russian).
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2. Fig. 1. Examples of release from stimulus-specific adaptation of the responses of four neurons of the primary auditory cortex of the awake mouse (a-d). At the top of the figure: the frequency receptive field of the neuron. The height of each column of the diagram is proportional to the number of spikes in the neuron's response. The arrows indicate the location of the tested series in the receptive field of the neuron. In the lower part of the figure: dependence of the magnitude of the response of the same neurons to the 5th tone in the series on its frequency. The neuron's response value (number of spikes) is normalised relative to its response to the 4th tone in the series, i.e. it is equal to the ratio of the number of spikes in the neuron's response to the 5th tone to the number of spikes in the response to the 4th tone. The dotted lines indicate the approximate low-frequency and high-frequency boundaries of the critical hearing bands of the mouse.

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3. Fig. 2. Normalised values of the responses of all neurons studied to the 5th tone in the series as a function of its frequency. The magnitude of neuron responses (number of spikes) is normalised relative to their responses to the 4th tone in the series. Dotted lines indicate approximate low-frequency and high-frequency boundaries of the critical hearing bands of the mouse. * - p < 0.01; ** - p < 0.05 - ANOVA on ranks, Dunn's test. N = 53.

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