The study, published in the October issue of Archives of General Psychiatry, uses data from functional and structural magnetic resonance imaging to identify how the areas of the brain associated with executive control and attention tend to have less activity in people who cannot be put into a hypnotic trance.
"There's never been a brain signature of being hypnotized, and we're on the verge of identifying one," said David Spiegel, MD, the paper's senior author and a professor of psychiatry and behavioral sciences. Such an advance would enable scientists to understand better the mechanisms underlying hypnosis and how it can be used more widely and effectively in clinical settings, added Spiegel, who also directs the Stanford Center for Integrative Medicine.
Spiegel estimates that one-quarter of the patients he sees cannot be hypnotized, though a person's hypnotizability is not linked with any specific personality trait. "There's got to be something going on in the brain," he said.
Hypnosis is described as a trance-like state during which a person has a heightened focus and concentration. It has been shown to help with brain control over sensation and behavior, and has been used clinically to help patients manage pain, control stress and anxiety and combat phobias.
Hypnosis works by modulating activity in brain regions associated with focused attention, and this study offers compelling new details regarding neural capacity for hypnosis.
"Our results provide novel evidence that altered functional connectivity in [the dorsolateral prefrontal cortex] and [the dorsal anterior cingulate cortex] may underlie hypnotizability," the researchers wrote in their paper.
For the study, Spiegel and his Stanford colleagues performed functional and structural MRI scans of the brains of 12 adults with high hypnotizability and 12 adults with low hypnotizability.
The researchers looked at the activity of three different networks in the brain: the default-mode network, used when one's brain is idle; the executive-control network, which is involved in making decisions; and the salience network, which is involved in deciding something is more important than something else.
The findings, Spiegel said, were clear: Both groups had an active default-mode network, but highly hypnotizable participants showed greater co-activation between components of the executive-control network and the salience network. More specifically, in the brains of the highly hypnotizable group the left dorsolateral prefrontal cortex, an executive-control region of the brain, appeared to be activated in tandem with the dorsal anterior cingulate cortex, which is part of the salience network and plays a role in focusing of attention. By contrast, there was little functional connectivity between these two areas of the brain in those with low hypnotizability.
Spiegel said he was pleased that he and his team found something so clear. "The brain is complicated, people are complicated, and it was surprising we were able to get such a clear signature," he explained.
Spiegel also said the work confirms that hypnotizability is less about personality variables and more about cognitive style. "Here we're seeing a neural trait," he said.
The authors' next step is to further explore how these functional networks change during hypnosis. Spiegel and his team have recruited high- and low-hypnotizable patients for another study during which fMRI assessment will be done during hypnotic states. Funding for that work is being provided by the National Center for Complementary and Alternative Medicine.
Funding for this study came from the Nissan Research Center, the Randolph H. Chase, MD Fund II, the Jay and Rose Phillips Family Foundation and the National Institutes of Health.
The study's first-author is Fumiko Hoeft, MD, PhD, who was formerly an instructor at Stanford's Center for Interdisciplinary Brain Sciences Research and is now an associate professor of psychiatry at UCSF. Other co-authors are John Gabrieli, PhD, a professor at MIT (then a professor of psychology at Stanford); Susan Whitfield-Gabrieli, a research scientist at MIT (then a science and engineering associate at Stanford); Brian Haas, PhD, an assistant professor at the University of Georgia (then a postdoctoral scholar in the Center for Interdisciplinary Brain Sciences Research at Stanford); Roland Bammer, PhD, associate professor of radiology; and Vinod Menon, PhD, professor of psychiatry and behavioral sciences.
Information on the medical school's Department of Psychiatry and Behavioral Sciences, which also supported this work, is available at http://psychiatry.stanford.edu/.
The Stanford University School of Medicine consistently ranks among the nation's top medical schools, integrating research, medical education, patient care and community service. For more news about the school, please visit http://mednews.stanford.edu. The medical school is part of Stanford Medicine, which includes Stanford Hospital & Clinics and Lucile Packard Children's Hospital. For information about all three, please visit http://stanfordmedicine.org/about/news.html.PRINT MEDIA CONTACT: Michelle Brandt at (650) 723-0272 (email@example.com)
Michelle Brandt | EurekAlert!
Europe’s Demographic Future. Where the Regions Are Heading after a Decade of Crises
10.08.2017 | Berlin-Institut für Bevölkerung und Entwicklung
Scientists reveal source of human heartbeat in 3-D
07.08.2017 | University of Manchester
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
23.08.2017 | Life Sciences
23.08.2017 | Life Sciences
23.08.2017 | Physics and Astronomy