Classification of musical hallucinations and the characters along with neural-molecular mechanisms of musical hallucinations associated with psychiatric disorders

Figure 4 Summary of the classification of musical hallucinations, the characters of musical hallucinations in psychiatric disorders, and highlight of shared and distinct mechanisms of musical and verbal-acoustic hallucinations in the field. A: Summaries the eight new classes of musical hallucinations (MHs) based on their etiological mechanisms; B: Represents the varying psychiatric diagnoses comorbid with MHs, the age difference and the gender difference in this category of the MH; C: Shows the up-to-date neuroimaging studies of brain regions and neural networks that most commonly affect MH. MH: Musical hallucinations; MDD: Major depressive disorder; ADHD: Attention deficit hyperactivity disorder; OCD: Obsessive-compulsive disorder.