A study in Japan has shown that a crying baby’s heart rate drops very quickly if the infant is picked up and carried by a familiar caregiver. Just holding the baby won’t do; the infant has to be picked up and carried.
Lead researcher and neurobiologist Dr. Kumi Kuroda, of the Riken Brain Science Institute, theorized that this is the same response that we see in other mammals, including puppies, kittens and lion cubs, all of which relax and go limp when picked up and carried with their mothers’ mouths.
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