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Induced and Disrupted Synesthesia Following Posthypnotic Suggestion
University of Skövde, School of Bioscience.
2022 (English)Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In synesthesia, a stimulus evokes sensory experiences in more than one sensory modality. Although synesthesia is a well-known condition, there is little understanding of how it comes about in the brain. Two theories are currently debated upon, the disinhibition-unmasking hypothesis and the hyperconnectivity hypothesis. Previous research has been conducted using various methods (e.g., associative learning & pharmacological induction) to induce synesthesia in non-synesthetes. This systematic review examined if synesthesia can be modified by posthypnotic suggestion with an aim to attain a clearer understanding of its neural underpinnings in regard to the two theories. Successful manipulation of synesthetic experiences through posthypnotic suggestion would strengthen the disinhibition-unmasking hypothesis. All studies on induction of synesthesia in this review indicate that it is possible to induce synesthetic-like experiences in non-synesthetes. Furthermore, one case study showed that disruption of synesthesia was also possible in one synesthete. Nonetheless, there is an agreement that these synesthetic experiences are not exactly comparable to those found in natural synesthesia. Studies used in this review all have a common limitation concerning the small sample size. Additionally, these few studies are currently some of the only ones thatexamine this very issue. Future research should aim at reproducing the current studies to see if the effect seen is replicable. It would also be beneficial to establish a common methodology for these experiments so that there can be fewer confounding variables. 

Place, publisher, year, edition, pages
2022. , p. 32
Keywords [en]
synesthesia, posthypnotic suggestion, disinhibition-unmasking, hyperconnectivity
National Category
Neurosciences
Identifiers
URN: urn:nbn:se:his:diva-21785OAI: oai:DiVA.org:his-21785DiVA, id: diva2:1694231
Subject / course
Cognitive Neuroscience
Educational program
Kognitiv neurovetenskap: Medvetandet och hjärnan - magisterprogram
Supervisors
Examiners
Available from: 2022-09-08 Created: 2022-09-08 Last updated: 2022-09-08Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • apa-cv
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
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  • de-DE
  • en-GB
  • en-US
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  • sv-SE
  • Other locale
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