Sound Affects the Discrimination of Low Light Intensities in the Rabbit Visual Cortex

Polyanskii, V.B.; Alymkulov, D.E.; Evtikhin, D.V.; Chernyshev, B.V.

Авторы: Polyanskii V.B., Alymkulov D.E., Evtikhin D.V., Chernyshev B.V.
Журнал: Neuroscience and Behavioral Physiology
Том: 46
Номер: 3
Год издания: 2016
Издательство: Kluwer Academic/Plenum Publishers
Местоположение издательства: United States
Первая страница: 241
Последняя страница: 248
DOI: 10.1007/s11055-016-0224-y
Аннотация: Visual evoked potentials (VEP) recorded from the visual cortex of conscious rabbits in chronic experiments were used to study the effects of sound (2000 Hz, 70 dB, 40 msec) on the discrimination of low light intensities (0.3–1 cd/m2). Sounds were delivered with different time delays before and after replacement of one light intensity by another (range –750 to +150 msec). The sound itself did not induce any response. A total of 42 experiments on three rabbits showed that sound had a significant modulatory effect on the discrimination of low light intensities in the range of sound-light intervals from –300 to +50 msec. Sound had the strongest effect going from high light intensities (1 cd/m2) to low (0.3 cd/m2). Analysis of the phases of visual evoked potentials showed that sound had a significant influence on the light response at intervals of –300, –100, –60, –40, –20, 0, +20, and +50 msec. During the P2 phase (120–150 msec from the moment of light stimulus substitution), sound had its greatest influence on substitution of low light intensities both in terms of the number of time intervals (seven) at which the effect of sound was significant (p < 0.05) and in terms of the extent of the effect of sound on the light response. The effects of sound in the P2 phase were almost exclusively facilitatory – by 19–36% compared with responses to light, while the N1 (80–110 msec) and N2 (180–250 msec) phases included 2–3 intervals with significant sound effects, the extent of facilitation of the response to light varying over the range 8–12%. It is suggested that the action of sound on the light response over time is mediated in the visual cortex with some delay due to passage of the sound signal through the auditory cortex, parietal cortex, and superior colliculi.
Добавил в систему: Евтихин Дмитрий Владимирович

	ИСТИНА	Войти в систему Регистрация
	Интеллектуальная Система Тематического Исследования НАукометрических данных
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

Интеллектуальная Система Тематического Исследования НАукометрических данных

Sound Affects the Discrimination of Low Light Intensities in the Rabbit Visual Cortexстатья

Прикрепленные файлы