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The Smell of Green Thunder: How Does Synesthesia Differ from Hallucination?

December 8, 2014
by
World Science Festival
YouTube video player
The Smell of Green Thunder: How Does Synesthesia Differ from Hallucination?

TL;DR

Synesthesia is a lifelong experience where senses are combined, while hallucinations can vary and are temporary. The overlap lies in the brain's connection between certain parts, which differ in stability and adaptability.

Transcript

I have a question I know that there are there are people such as yourself who experience things like migraine auras and and patterns on the ceiling and a certain who sanatory day-to-day experience and I also know that when people are having more isolated experiences they experience a sort of synesthesia of senses that one might see sounds or hear c... Read More

Key Insights

  • 🤔 Synesthesia is not as rare as once thought and is relatively common, affecting about one in twenty individuals.
  • 👯 It is believed that every infant experiences synesthesia in their first year of life, but the possibility is pruned out in the majority of people.
  • 💌 Synesthesia can manifest in various forms, such as color association with music or letters, indicating a connection between different brain areas.
  • 😷 Hallucinations induced by substances or certain medical conditions, like epilepsy, can also create synesthetic-like experiences, but they are unstable and vary over time.
  • 💱 Synesthesia is a consistent and lifelong experience, whereas hallucinations can change from one occurrence to another.
  • 👯 Some people with synesthesia embrace and appreciate their sensory combinations, while others may dislike or be indifferent towards them.
  • 💨 Synesthesia can provide a helpful way of connecting sensory experiences for individuals who have it.

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Questions & Answers

Q: What is the difference between synesthesia and a hallucination?

Synesthesia is a lifelong experience where senses are combined, like seeing colors when hearing music. Hallucinations, on the other hand, are temporary and can vary in content and intensity. While synesthesia is present from birth, hallucinations can be induced or a result of certain medical conditions.

Q: Can synesthetic individuals see colors that others have never seen?

Yes, individuals with synesthesia can perceive colors that they have never actually seen in the real world. For example, someone who is colorblind with color synesthesia may see "martian colors" that they have never seen in their normal vision.

Q: Is there any overlap between synesthesia and hallucinations in the brain?

There is some overlap in the brain between synesthesia and hallucinations. Certain parts of the brain responsible for color perception and reading, for example, may be connected in synesthetic individuals. However, the experiences of synesthesia and hallucinations are generally considered separate phenomena.

Q: Can synesthesia be eliminated or reduced in individuals who experience it?

While attitudes towards synesthesia vary among individuals, some may desire to have their synesthetic experiences relieved. However, the ethical question arises as to whether it would be right to alter or eliminate a natural trait like synesthesia if it were technically possible.

Summary & Key Takeaways

  • Synesthesia, a condition where senses are combined, is present in infants but is pruned out in the majority of people, leaving only a few individuals with the experience.

  • Common forms of synesthesia include seeing colors when hearing music or reading letters, and it remains the same throughout a person's life.

  • Hallucinations, on the other hand, can be induced by medications like LSD or certain epilepsies, but they are unstable and can differ with each occurrence.


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