New study tries to decode how brains convert sounds into actions

Researchers from the Champalimaud Centre for the Unknown have discovered how the brain converts sounds to actions. These discoveries could someday help us unravel how the brain translates perceptions into actions.This is the brain’s outer layer responsible for shaping our conscious perception of the world. The cortex is a part of the brain divided into different regions, each responsible for specific functions.

The mice were trained to decide between two actions to isolate signals for specific actions. They had to determine if a sound was high or low compared to a set threshold and indicate their decision by licking one of two spouts on the left or right side.“To separate brain activity related to the sound from that related to the response, we introduced a critical half-second delay. During this interval, the mice had to withhold their decision,” Steinfeld explained.

“Signals related to sound detection appeared quickly but faded fast, vanishing around 400 milliseconds after the sound was presented, and were distributed broadly across all cortical layers,” he stressed.

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