Lateral suppression of rhythmic evoked responses in the dolphin's auditory system
| Autor: | Vladimir V. Popov, Vladimir O. Klishin, Alexander Ya. Supin |
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| Rok vydání: | 1998 |
| Předmět: |
Male
Periodicity medicine.medical_specialty Auditory Pathways Time Factors Dolphins Paired stimulation Audiology Stimulus (physiology) Functional Laterality Rhythm Evoked Potentials Auditory Brain Stem medicine Animals Auditory system Physics Carrier signal Neural Inhibition Sensory Systems Electrophysiology medicine.anatomical_structure Auditory brainstem response Amplitude Acoustic Stimulation Female Brain Stem |
| Zdroj: | Hearing Research. 126:126-134 |
| ISSN: | 0378-5955 |
| DOI: | 10.1016/s0378-5955(98)00155-5 |
| Popis: | In the auditory system of bottlenose dolphins (Tursiops truncatus), a brain-evoked response to rhythmic sound amplitude modulations (the envelope-following response) was markedly suppressed by addition of another sound with a frequency 5–20 kHz higher and an intensity down to 40 dB lower than that of the amplitude-modulated signal. This effect was called paradoxical lateral suppression. This phenomenon was primarily observed when the amplitude-modulated stimulus had a carrier frequency above 30 kHz and modulation rates above 500 Hz. Only the sustained rhythmic response was suppressed, while the transient on-response was not. This indicates that the suppression influenced the ability of evoked potentials to follow rapid amplitude modulations. This prevents weak sounds from being masked by stronger ones. |
| Databáze: | OpenAIRE |
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