Sleep is a natural healer next only to Time..
If people start worrying about this, then what?
leave Sleep to its own way and Sleep Well.
“The July/August issue of Scientific American Mind made its debut online late last week. Here I divulge some of the more surprising and useful lessons from its pages.
Dozing Dangerously
Sleepwalking is one of the strangest phenomena I have ever witnessed. Despite its name, it doesn’t resemble any other kind of sleep I’ve seen. To me, it appears as if an odd imposter has temporarily inhabited the body of someone I know. The person’s eyes are open. He or she gets up, strolls or scampers around, and can hug me or grab a drinking glass. He may even talk to me. The slumbering human really seems awake—until it dawns on me that his behavior is distinctly erratic. The person may respond to me—say, take a drink when I give him a glass of juice—but in an odd manner, say, gulping the liquid as if in a huge hurry. His eyes might open wide as if he’s panic-stricken, but the cause of the panic is nowhere to be seen. And he may do nonsensical things such as pouring liquid from a cup into the trashcan.
In 1846, Albert Tirrell was acquitted of the murder of Maria Bickford because he was sleepwalking. By National Police Gazette via Wikimedia Commons.
When a person is sleepwalking, as we report in the current issue of the magazine, the brain is kind of half awake. Some parts, those involved in talking and walking, are operational. But other parts, those involved in reasoning and self-control, are pretty much in lala land, explaining why the person’s actions make no sense. Sleepwalking is apparently common (and usually benign) in children. But in some adults it turns violent (see “Are Sleepwalking Killers Conscious?” by Francesca Siclari, Guilio Tononi and Claudio Bassetti). In rare cases, sleepwalkers have committed murder, and at least half of those with sleep disorders exhibit less serious forms of unintentional violence. In some instances, the murderous sleeper has been acquitted (see illustration). But questions of culpability remain. Was it a strange imposter’s fault? Probably, but the loss of control is frightening for all concerned.
On the plus side, researchers are uncovering the biological roots of such odd actions in hopes of developing treatments. In the process, they are also gleaning clues to the origins of consciousness.
Microbial Madness
Speaking of brains subverted by demons, consider the influence of gut microbes. One parasite co-opts the intentions of mice such that they are drawn to cats, which, of course, then consume the brainwashed rodents (see “Microbes Manipulate Your Mind,” by Moheb Costandi). In humans, gut microbes can subtly change our moods and emotional states. The “brains” in our guts—a combination of 500 microorganisms that seems to vary from one person to the next—may even explain differences between people in personality as well as disparities between us in symptoms of psychiatric illnesses.
Notably, our bodies’ microbial inhabitants might make us more or less able to withstand stress. Colicky babies, we report, seem to have a less diverse array of germs in their gut, and seem to be predisposed to stress later on. But as adults, we might also be able to deliberately colonize ourselves for better mental health. Early data suggest that probiotics might be able to quell anxiety. Whenever I feel overwhelmed, I am going to make a point of indulging in live-culture yogurt, and not just for the calcium. Taking stress down a notch, after all, can improve productivity.
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