Study: The rough sound of salience enhances aversion through neural synchronisation

Why is is that children’s screams affect us so much? Crying is one thing. But, a scream gets adrenaline revved up and someone is going to die. These researchers looked at why.

They define how the physical properties of a scream differ from other similar sounds. It fits in 30–150 Hz, is loud, and has fast repetitive flicker like effects. These combine to capture attention due to the unpleasantness.

They used iEEG electrodes to measure brain activity. They looked at a small number of patients.

One of the areas that lit up is used in processing language and emotional context. While the superior temporal gyrus is in a part of the brain associated with sound, when analyzing facial expressions, we also leverage this area to understand emotions.

Arnal, LHKleinschmidt, A, et al. “The rough sound of salience enhances aversion through neural synchronisation” Nature Communications volume 10, Article number: 3671 (2019)

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