Last, the researchers observed reduced connections between the dorsolateral prefrontal cortex and the default mode network, which includes the medial prefrontal and posterior cingulate cortex. Spiegel describes this as a brain-body connection that helps the brain process and control what’s going on in the body. Second, they saw an increase in connections between two other areas of the brain - the dorsolateral prefrontal cortex and the insula. “In hypnosis, you’re so absorbed that you’re not worrying about anything else,” Spiegel says. They saw three changes in the highly hypnotizable group while those subjects were under guided hypnosis, but not while they were at rest or recalling a memory.įirst, they saw a decrease in activity in an area called the dorsal anterior cingulate, part of the brain’s salience network. The researchers used functional magnetic resonance imaging to observe the brains of 57 subjects - 36 who were highly hypnotizable and 21 who were quite the contrary. Spiegel is the senior author of a new study, published online in July in Cerebral Cortex, showing which areas of the brain have altered activity during hypnosis. “In fact, it’s a very powerful means of changing the way we use our minds to control perception and our bodies.” You are getting sleepy, very sleepy … but why? “Hypnosis is the oldest Western form of psychotherapy, but it’s been tarred with the brush of dangling watches and purple capes,” says David Spiegel, MD, professor and associate chair of psychiatry and behavioral sciences.
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