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?
- Part I: Bee Deaths Mystery Solved? Neonicotinoids (Neonics) May Actually Help Bee Health
- 3X Saturated Fat In The Diet Doesn't Increase It In Blood
- Eosinophilic Esophagitis: Genetic Clues Of Severe Food Allergy
- Still No Contact with NASA's Sun-watching Probe
- Interstellar Is A Dangerous Fantasy Of US Colonialism
- Want A Man To Help? High Heels Work
- Is Religion A Consolation Worth Having?
- "As an earlier cigarette smoker and now e-cig smoker, I can confirm they don't help you quit. As..."
- "Reality? What is reality if you use irrational arguments to justify man's cruelty toward..."
- "Always loved the Heels that showed of the instep (arches) ..."
- "By the way, I am a fan of your blog. It's one of the few places I can follow physics without getting..."
- "Hello Anon,you're entirely right, it's arbitrary and it does not provide protection against cases..."
- Gene in kidney may play role in high blood pressure
- Panel-based genetic diagnostic testing for inherited eye disease proves highly accurate
- Research finds tooth enamel fast-track in humans
- Good news for cocaine users: Caffeine counters cocaine's effects on women's estrus cycles
- Clipping proteins that package genes may limit abnormal cell growth in tumors