Synaesthesia: Reflex Hallucinations

Synesthesia is a neurological condition in which information meant to stimulate one of your senses stimulates several of your senses. People who have synesthesia are called synesthetes.

The word “Synesthesia” comes from the Greek words: “synth” (which means “together”) and “ethesia” (which means “perception)

Synesthesia is a disorder in which one sense (for example, hearing) is simultaneously perceived as though by one or more additional senses such as sight. Another type of Synesthesia connects things such as letters, shapes, numbers, or people’s names with a sensory experience such as scent, color, or taste. The term synesthesia is derived from two Greek words, syn (together) and aisthesis (perception). Therefore, Synesthesia literally means “joint perception.”


People who experience Synesthesia are usually born with it or develop it very early in childhood.

The person who is addicted to drugs especially hallucinogenic drugs common under the influence of LSD ( Lysergic Acid Diethylamide).


There are multiple types of Synesthesia, all with different symptoms. Grapheme-color Synesthesia, where you connect letters and days of the week with colors, maybe the most well-known. But there’s also sound-to-color Synesthesia, number-form Synesthesia, and many others.


  1. Involuntary perceptions that cross over between senses (tasting shapes, hearing colors, etc.)
  2. Sensory triggers that consistently and predictably cause interplay between senses (e.g., every time you see the letter A, you see it in red)
  3. Ability to describe their unusual perceptions to other people.


  • There’s no treatment for synesthesia. Anecdotally, many people seem to enjoy perceiving the world in a different way than the general population.
  • Some of them may feel good with this condition and enjoy these kinds of hallucinations.
  • And others may complain about these feelings of hallucinations and can’t explain their sensory experience.

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