Mice may ‘catch’ each other’s pain — and pain relief

After an hour of mingling, healthy mice mirror a companion’s pain or morphine-induced relief

mice cuddling

A new study finds connections in the brain that are critical for unharmed mice to feel when another mouse is in pain — and when that pain goes away.

Monique Smith and Boris Heifets

In pain and pain relief, mice may feel for each other.