stimuli

Not just with the world, but with our imaginations, and experiences that now live only in memory rather than being triggered by external stimuli.

Since horses are prey animals, they have evolved to respond to the subtlest of aural stimuli.

"She remained unresponsive to stimuli. Her brain continued to swell, pushing the brain out of the skull cavity," said Mrs Prior.

In one 2019 study, participants had their brains scanned while experiencing a wide range of scary stimuli.

Afterward, the animals were placed in a new setting where they could escape the stimuli.