Electrical activity in a region of the parietal cortex underlies the detection of a transition between two complex sounds, finds a study of human participants published in eNeuro. The research provides insight into how the brain tunes into relevant changes in the environment to optimize behavior.

The world is filled with a multitude of ever-changing sound. While some of these sounds signal important information about the environment, such as the presence of danger, many others are not so useful. Detecting changes in a natural soundscape is essential for identifying which sounds should be attended to.

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