Hypnosis can induce synesthesiaOctober 24th, 2008 - 3:55 pm ICT by ANI
Washington, Oct 24 (ANI): In a new study, scientists have established that hypnosis can trigger “synesthetic” experiences where one sense triggers the involuntary use of another within an average brain.
The findings ruled out the popular perception that people with synesthesia have extra connections in their brain.
Instead, it suggested that their brains might simply do more ”cross talking, which could be induced by changing inhibitory processes in the average brain.
Titled, “Induced cross-modal synesthetic experience without abnormal neuronal connections,” the research was conducted by an international group that includes Cohen Kadosh, previously a doctoral student at Ben-Gurion University of the Negev.
Synesthesia (known as synesthetes) patients experience abnormal interactions between the senses.
For example digit-color synesthesia, for instance, will experience certain numbers in specific colors (for example, they might experience the number seven as red).
Scientists have attributed the phenomenon to the existence of extra connections between brain areas in synesthesia, but the new study suggests otherwise.
For examining the alternative theory of more cross talk (disinhibition) between brain areas in synesthetes, Cohen Kadosh and colleagues used posthypnotic suggestion to show that people who are not synesthetes can be induced to have synesthetic experiences.
The researchers saw that after inducing digit-color synesthesia, the volunteers had similar experiences to those undergone by real synesthetes in their everyday life.
Also, hypnotized participants failed a catch test which was also failed by real synesthetes: when subjects were hypnotized to experience seven as red (for example) they could not detect the number when a black seven was presented on a red background.
“Our study shows that hypnosis can induce synesthetic experiences in people, suggesting that extra brain connections are not needed to experience cross-sensory interactions and that it is a change in inhibitory processes - more cross talk within the brain - that causes these experiences. This takes us one step closer to understanding the causes of synesthesia and abnormal cross-brain interactions, said Cohen Kadosh.
The study is published in the journal Psychological Science, the premiere publication of the Association for Psychological Society. (ANI)
- Psychologists prove existence of hypnotic state - Oct 30, 2011
- Weak at maths? Try zapping your brain! - Nov 05, 2010
- Electrical brain stimulation may boost math skills - Nov 05, 2010
- How Alzheimer's plaques lead to loss of nitric oxide in brain - Jan 11, 2011
- Researchers discover individuals who ''hear'' movement - Aug 07, 2008
- Electric shock improves academic performance - Jan 26, 2012
- Adult brain is continually modified by experience, finds study - Jun 16, 2010
- Hypnosis effective in treating irritable bowels - Apr 03, 2012
- Why normal kids with Rett syndrome become abnormal later? - Apr 14, 2011
- 'Cool' imagery lowers hot flashes in women nearing menopause - Jul 18, 2010
- Gene duplication gave humans powerful brain - May 04, 2012
- Scientists shed light on cellular basis of depression - Feb 24, 2011
- Taking an active role in learning enhances memory: Study - Dec 07, 2010
- Hypnotist to cast a spell on UK via Twitter, Facebook! - Dec 30, 2009
- Why some people easily fall into hypnotic trance - Jan 21, 2010
Tags: ben gurion university, ben gurion university of the negev, black seven, brain areas, brain connections, cross talk, disinhibition, doctoral student, hypnosis, inhibitory processes, international group, kadosh, neuronal connections, number seven, red background, synesthesia, synesthetes, synesthetic experience, synesthetic experiences, university of the negev