People living with synaesthesia (known as synaesthetes) experience abnormal interactions between the senses. Digit-color synaesthetes, for instance, will experience certain numbers in specific colors (for example, they might experience the number seven as red). A possible reason put forward for this phenomenon is the existence of extra connections between brain areas in synaesthetes, but the new study, published in the journal Psychological Science, suggests otherwise.
Hypnosis can induce synaesthetic experiences – where one sense triggers the involuntary use of another – according to a new study by UCL (University College London) researchers. The findings suggests that people with synaesthesia, contrary to popular belief, do not necessarily have extra connections in their brain; rather, their brains may simply do more 'cross talking' and this can be induced by changing inhibitory processes in the average brain.
To explore the alternative theory of more cross talk (disinhibition) between brain areas in synaesthetes, Dr Roi Cohen Kadosh and colleagues used posthypnotic suggestion to show that people who are not synaesthetes can be induced to have synaesthetic experiences.
After inducing digit-color synaesthesia, the volunteers reported similar experiences to those undergone by real synaesthetes in their everyday life. For example, one participant described seeing the numbers on car number plates in specific colors, while walking around under posthypnotic suggestion. Moreover, hypnotized participants failed trick tests which were also failed by real synaesthetes: in one test, when subjects were hypnotized to experience seven as red, they could not detect the number when a black seven was presented on a red background.
Dr Roi Cohen Kadosh, UCL Institute of Cognitive Neuroscience, says: "Our study shows that posthypnotic suggestion can induce synaesthetic experiences in people, suggesting that extra brain connections are not needed to experience cross-sensory interactions and that it is more cross talk within the brain that causes these experiences. This takes us one step closer to understanding the causes of synaesthesia and abnormal cross-brain interactions."
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- Thinking 'I Can Do Better' Really Can Improve Performance, Study Finds
- Brain Cancer: Why Glioblastoma Is So Difficult To Treat
- Benign Bacteria Block Mosquitoes From Transmitting Zika, Chikungunya Viruses
- Some Celiac Disease May Be Due To Viruses
- Can A New Rule Trigger A Second EU Referendum? Petition 4 Millon Signatures, Nearly 12% Of Total Votes Cast
- How A Former Naturopath Can Help Unravel The Trickery of Alternative Medicine
- Little To No Association Between Butter Consumption And Chronic Disease Or Total Mortality
- " Media Silent as Concealed Carrier Stops Mass Shooting in Progress at a South Carolina Nightclub..."
- "Thank you for your support - but since the comment you refer to was advocating the shutting down..."
- "Instead of ND, substitute DD, and you have a whole other basket of charlatans - and that comment..."
- " Some parts from my second response to Nina Teicholz article ( http://www.bmj.com/content/351/bmj..."
- "Science researchers did the CARET study, to see if vitamin A could chemo-prevent lung cancer (it..."
- The Relationship Between Alcohol and Happiness
- Psst…NRDC Stoners: Your Endocrines Are Disrupted
- College Kids Mostly Blow Off Food-Label Use, Study Finds
- Blue Birds Aren’t Blue, and This is How They Fool You
- ‘Vaxxed’: The Film That No One Saw
- Vice President Joe Biden Threatens the Scientific Community
- Consensus statement: Environmental toxins hurt brain development, action needed
- New anti-cancer strategy mobilizes both innate and adaptive immune response
- Aging population is growing ranks of cancer survivors
- UK government should fund media campaigns that promote quitting, not films that promote smoking
- Report: A host of common chemicals endanger child brain development