They're called involuntary because the person isn't consciously controlling them and is often unaware of the movement. A person with obstructive sleep apnea temporarily stops breathing during sleep because the airway becomes narrowed or blocked. Arts + Culture - Entertainment For Teens by Teens
It's also true that waking sleepwalkers can startle them but it isn't harmful , so try to guide a sleepwalker back to bed gently. Most teens have nightmares once in a while. Paying tribute to the generations of Hispanic Americans who have positively influenced and enriched our nation and society.