Ultrasound-induced hibernation: A potential solution for long-term space travel.

Scientists have induced a torpor-like state in rats by activating neurons in the hypothalamus preoptic area of the brain using helmets that delivered ultrasonic pulses. The same system also worked on rats, which don't naturally hibernate. The study opens up the possibility of developing wearable ultrasound devices for easy access in emergency situations and could buy critical time for treating life-threatening conditions. If feasible in humans, astronauts could wear a helmet-like device designed to target the hypothalamus region for inducing a hypothermia and hypometabolism state, preventing muscle loss and reducing the size of spacecraft needed for long journeys.