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Schizophrenia is a complex psychiatric disorder characterized by a range of symptoms that significantly impact cognition, behavior, and emotional regulation. Among these, the positive symptoms stand out as they involve the addition or exaggeration of normal mental functions, deviating markedly from typical behavior and perception. Hallucinations and delusions are prominent positive symptoms, each profoundly affecting the individual's experience of reality.
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Synesthesia is a remarkable condition where stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway. People with synesthesia experience a blending or crossing of their senses, such as sight and sound, leading to cross-modal sensations. In this condition, the stimulation of one sense, such as hearing a number or musical note, triggers an experience of another sense, like sensing a specific color, taste, or smell. People...
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Related Experiment Video

Updated: May 12, 2026

fMRI Mapping of Brain Activity Associated with the Vocal Production of Consonant and Dissonant Intervals
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Published on: May 23, 2017

Hallucinations of musical notation.

Oliver Sacks1

  • 1NYU School of Medicine, New York, NY 10014, USA. mail@oliversacks.com

Brain : a Journal of Neurology
|March 27, 2013
PubMed
Summary

Hallucinations involving musical notation can manifest in conditions like Charles Bonnet syndrome and Parkinson's disease. This study discusses eight cases and their potential brain mechanisms.

Area of Science:

  • Neuroscience
  • Psychiatry
  • Ophthalmology

Background:

  • Hallucinations, particularly visual ones, are complex phenomena.
  • Musical notation hallucinations are a rare but documented form of visual hallucination.
  • These hallucinations can occur across diverse neurological and medical conditions.

Purpose of the Study:

  • To describe eight distinct cases of musical notation hallucinations.
  • To explore the potential underlying cerebral mechanisms contributing to these hallucinations.
  • To add to the understanding of complex visual processing and its disruptions.

Main Methods:

  • Case study analysis of eight patients experiencing musical notation hallucinations.
  • Review of patient histories, symptoms, and neurological examinations.
Keywords:
Charles Bonnet syndromeParkinson’s diseasehallucinationsmental imagerymusic

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  • Discussion of potential neurobiological correlates based on existing literature.
  • Main Results:

    • Eight cases of musical notation hallucinations were documented.
    • Hallucinations were associated with conditions including Charles Bonnet syndrome, Parkinson's disease, fever, intoxications, and sleep-related states.
    • The study provides a basis for discussing the cerebral mechanisms involved.

    Conclusions:

    • Musical notation hallucinations are linked to a spectrum of conditions affecting the brain.
    • Further research into the neurobiology of these specific hallucinations is warranted.
    • Understanding these phenomena can offer insights into visual processing and aberrant perception.