Open the neurons, allowing to perceive new sounds

Open the neurons, allowing to perceive new soundsA new discovery made by scientists at the University of Washington and the University of Salamanca explains the human ability not to take the ticking of the clock and the hum of the motor. A group of Spanish and American neurologists discovered neurons that respond exclusively to new, unusual sounds, allowing mammals, in that the number of man, not to be distracted by monotonous repetitive sounds. "New detector neurons is able to stop the transmission of electrical impulses in the case of repetition of the same sounds or sound and quickly resume when changing, writes The European Journal of Neuroscience. The study of neurons was performed on rats, scientists at Washington University and researchers from the University of Salamanca (Spain). Previously, these neurons were found in the brain of the frog, in mammals, they discovered for the first time. The researchers believe that a similar detector neurons are present in the brains of all mammals, including humans. "New" neurons are localized in the subcortical center hearing, which raspored in the lower hills of the mid-brain. It is known that neurons are able to perceive the change in the height, volume and duration as a single sound or series of sounds. Frequency spectrum that is perceived by a person is from 20 Hz to 20 KHz, the highest sensitivity was in the range from 2 to 4 KHz. The frequency range of human speech ranges from 500 Hz to 2 KHz. New data suggest that the "detector" neurons necessary to draw attention to unexpected sounds that may require quick reflex response. Simultaneously neurons play the role of a filter that separates the relevant and irrelevant to human sounds, allowing you to ignore unnecessary information, such as the ticking of the clock or the sound of the motor when driving. At the same time, these sounds can attract a person's attention to unusual sounds in the motor or phone call. The last opening gives way to new experiments that will allow us to better investigate the mechanisms underlying memory, prediction and selective attention. Mednovosti.ru.



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