Barry Maletzky News Today

Scientists used light to raise a mouse’s heart rate, increasing anxiety-like behaviors in the animal. The study offers a new angle for studying anxiety

The head and the heart Scientists used light to raise a mouse’sheart rate, increasing anxiety-like behaviors in the animal. Thestudy offers a new angle for studying anxiety disorders, BethanyBrookshire reported in “In mice, anxiety isn’t all in the head”(SN: 4/8/23, p. 9). Reader Barry Maletzky asked why strenuousexercise, which elevates heart rate, doesn’t typically induceanxiety. Heart rate isn’t everything, says neuroscientist KarlDeisseroth of Stanford University. The heart may r...