A Review of Multimodal Hallucinations: Categorization, Assessment, Theoretical Perspectives, and Clinical Recommendations

@article{Montagnese2020ARO,
  title={A Review of Multimodal Hallucinations: Categorization, Assessment, Theoretical Perspectives, and Clinical Recommendations},
  author={Marcella Montagnese and Pantelis Leptourgos and Charles Fernyhough and Flavie Waters and Frank Lar{\o}i and Renaud Jardri and Simon McCarthy-Jones and Neil Thomas and Robert Dudley and John-Paul Taylor and Daniel Collerton and Prabitha Urwyler},
  journal={Schizophrenia Bulletin},
  year={2020},
  volume={47},
  pages={237 - 248}
}
Abstract Hallucinations can occur in different sensory modalities, both simultaneously and serially in time. They have typically been studied in clinical populations as phenomena occurring in a single sensory modality. Hallucinatory experiences occurring in multiple sensory systems—multimodal hallucinations (MMHs)—are more prevalent than previously thought and may have greater adverse impact than unimodal ones, but they remain relatively underresearched. Here, we review and discuss: (1) the… 
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References

SHOWING 1-10 OF 103 REFERENCES
Modality-general and modality-specific processes in hallucinations
TLDR
It is suggested that a functional systems approach, inspired by some neglected aspects of the writings of A. R. Luria, can help to understand patterns of hallucinatory experience across modalities and across clinical and non-clinical groups.
A comprehensive review of auditory verbal hallucinations: lifetime prevalence, correlates and mechanisms in healthy and clinical individuals
TLDR
This review will examine the presentation of auditory hallucinations across the life span, as well as in various clinical groups, including childhood, adolescence, adult non-clinical populations, hypnagogic/hypnopompic experiences, high schizotypal traits, schizophrenia, substance induced AVH, AVH in epilepsy, and AVh in the elderly.
Repeated visual hallucinations in Parkinson's disease as disturbed external/internal perceptions: Focused review and a new integrative model
TLDR
This work suggests that VH should be considered as a dysregulation of the gating and filtering of external perception and internal image production and suggests new, testable hypotheses regarding their pathophysiology and therapy.
A comparison of visual hallucinations across disorders
Visual hallucinations in eye disease
  • D. Ffytche
  • Medicine, Psychology
    Current opinion in neurology
  • 2009
TLDR
Current research into visual hallucination is predominantly ophthalmology-led, with increasing recognition of the phenomena, their prevalence and prognosis within the specialty, and whether hallucinations require treatment and, if so, what that treatment should be remains unclear.
Hallucinations in Children and Adolescents: An Updated Review and Practical Recommendations for Clinicians
TLDR
A tailored care model for clinicians is presented by presenting assessment tools validated to measure hallucinations in children and adolescents and future challenges for research are outlined.
Very early hallucinatory experiences: a school‐based study
TLDR
The association with the presence of an IC confirms experimental findings of the likelihood of perceiving words among meaningless auditory stimuli and relations between hallucinatory experiences and theory of mind need to be addressed in longitudinal studies.
...
...