Some of these connections transverse the entire brain from the frontal cortex back to the occipital lobe, while other white matter tracts connect adjacent regions. 1 – Connectivityīoth autism and synesthesia are characterized by increased white matter tracts connecting different parts of the brain. For more information in (hyper)connectivity in the autistic brain, have a look at our following post: Autistic brain differences pt. Autism seems to be largely characterized by these deficits and advantages. In any case, hyperconnectivity can result in certain deficits, but also in certain advantages, such as synesthesia. I will highlight a few of these and their connection to synesthesia in a moment. Is synaesthesia more common in autism?įour mechanisms have been proposed to account for neural hyperconnectivity: These connections are either diminished or absent in neurotypical individuals. The hyperconnectivity hypothesis proposes that people with synesthesia have excessive neural connections between different regions. Researchers have sought the reason behind this significant increase in synesthesia in autistic people, and found an approximate answer.īoth conditions involve atypical neural connectivity and indeed neuroimaging studies confirm that synesthesia is associated with differences in brain structure and/or function. Synesthesia Linked to Autism | PsychCentral Other common types of synesthesia were seeing color when exposed to tastes or smells. Grapheme–color synesthesia (seeing black letters as colored).Chromesthesia or sound–color synesthesia (when a sound triggers a visual experience of color).Research has found that in people who are both autistic and synesthetes, the most common types were those known as: Synesthesia Linked to Autism | PsychCentral Sensory links between autism and synesthesia pinpointed Is synaesthesia more common in autism?įurthermore, experts in both conditions published in the journal Scientific Reports found that both synesthetes and autistics experience heightened sensory sensitivity. ![]() Research has found significant phenotypic and genetic overlap between synesthesia and absolute pitch, a trait that has also been reported to occur at increased frequency in autistic people. However, synesthesia was diagnosed in an impressive 19% of autistic people, compared to 4% in the general population. Research has indicated that autistic people have a greater than average chance of having synesthesia while autism occurs in approximately 1% (to 2.5%) of the population and synesthesia occurs in 4% of the population, the co-occurrence of the conditions would statistically be 0.04% ( 4 in 10,000 people). In this post, I will explain why the two actually have a significant connection. ![]() So synesthesia is defined as a joining of the senses, where for instance music may trigger colours, or words may trigger tastes.Īt first glance, synesthesia and autism may appear to have nothing to do with each other. Is synaesthesia more common in autism? In other words, one sensory experience activates another sensory experience. ![]() Synesthesia occurs when the stimulation of one sensory modality automatically evokes a perception in another unstimulated modality. Different ways of knowing | Daniel Tammet | TED - Daniel Tammet It’s not only numbers that I see in colors.
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